diff --git a/packages/pug-code-gen/index.js b/packages/pug-code-gen/index.js
index a75929ce9..02d3d61c1 100644
--- a/packages/pug-code-gen/index.js
+++ b/packages/pug-code-gen/index.js
@@ -8,7 +8,14 @@ var compileAttrs = require('pug-attrs');
 var selfClosing = require('void-elements');
 var constantinople = require('constantinople');
 var stringify = require('js-stringify');
-var addWith = require('with');
+
+var findGlobals = require('with/lib/globals.js').default;
+
+var t = require('@babel/types');
+var gen = require('@babel/generator');
+var babylon = require('@babel/parser');
+var babelTemplate = require('@babel/template').default;
+var babel = require('@babel/core');
 
 // This is used to prevent pretty printing inside certain tags
 var WHITE_SPACE_SENSITIVE_TAGS = {
@@ -26,6 +33,22 @@ var INTERNAL_VARIABLES = [
   'pug_html',
 ];
 
+var push = Array.prototype.push;
+var unshift = Array.prototype.unshift;
+var concat = Array.prototype.concat;
+
+var tpl_json_interp = JSON.stringify(
+  babelTemplate.ast(`null == (pug_interp = VALUE) ? "" : pug_interp`)
+);
+
+var tpl_json_interp_escape = JSON.stringify(
+  babelTemplate.ast(`escape(null == (pug_interp = VALUE) ? "" : pug_interp)`)
+);
+
+var tpl_json_buffer = JSON.stringify(
+  babelTemplate.ast(`pug_html = pug_html + placeholder`)
+);
+
 module.exports = generateCode;
 module.exports.CodeGenerator = Compiler;
 function generateCode(ast, options) {
@@ -50,7 +73,6 @@ function toConstant(src) {
 function Compiler(node, options) {
   this.options = options = options || {};
   this.node = node;
-  this.bufferedConcatenationCount = 0;
   this.hasCompiledDoctype = false;
   this.hasCompiledTag = false;
   this.pp = options.pretty || false;
@@ -70,6 +92,12 @@ function Compiler(node, options) {
   if (this.debug && this.inlineRuntimeFunctions) {
     this.runtimeFunctionsUsed.push('rethrow');
   }
+  this.codeBuffer = 'plug=function*(){';
+  this.codeMarker = {};
+  this.codeIndex = -1;
+
+  this.useGenerators = false;
+  this.templateVars = ['locals'];
 }
 
 /**
@@ -77,12 +105,14 @@ function Compiler(node, options) {
  */
 
 Compiler.prototype = {
-  runtime: function(name) {
+  runtime: function(name, asAST) {
     if (this.inlineRuntimeFunctions) {
       this.runtimeFunctionsUsed.push(name);
-      return 'pug_' + name;
+      return asAST ? t.identifier('pug_' + name) : 'pug_' + name;
     } else {
-      return 'pug.' + name;
+      return asAST
+        ? t.memberExpression(t.identifier('pug'), t.identifier(name))
+        : 'pug.' + name;
     }
   },
 
@@ -95,6 +125,192 @@ Compiler.prototype = {
     throw err;
   },
 
+  parseExpr: function(expr) {
+    //return babylon.parse('function*g(){return e='+expr+'}').program.body[0].body.body[0].argument.right;
+    return babylon.parseExpression(expr);
+  },
+  parseArgs: function(args) {
+    return babylon.parse('a(' + args + ')').program.body.pop().expression
+      .arguments;
+  },
+  ast_variableDeclaration: function() {
+    return t.variableDeclaration('var', [
+      t.variableDeclarator(t.identifier('pug_html'), t.stringLiteral('')),
+      t.variableDeclarator(t.identifier('pug_mixins'), t.objectExpression([])),
+      t.variableDeclarator(t.identifier('pug_interp'), null),
+    ]);
+  },
+  ast_return: function() {
+    return [t.returnStatement(t.identifier('pug_html'))];
+  },
+  wrapCallExpression: function(node) {
+    return node;
+  },
+  ast_buffer: function(ast) {
+    const o = JSON.parse(tpl_json_buffer);
+    o.expression.right.right = ast;
+    return o;
+  },
+  ast_with: function(ast) {
+    let exclude = this.options.globals
+      ? this.options.globals.concat(INTERNAL_VARIABLES)
+      : INTERNAL_VARIABLES;
+    exclude = exclude.concat(
+      this.runtimeFunctionsUsed.map(function(name) {
+        return 'pug_' + name;
+      })
+    );
+    exclude.push('undefined', 'this', 'locals');
+    let vars = findGlobals(t.program(ast))
+      .map(function(v) {
+        return v.name;
+      })
+      .filter(function(v) {
+        return exclude.indexOf(v) === -1;
+      });
+    if (vars.length > 0) {
+      let bag = 'locals';
+      ast = [
+        t.expressionStatement(
+          t.callExpression(
+            t.memberExpression(
+              t.functionExpression(
+                null,
+                vars.map(function(v) {
+                  return t.identifier(v);
+                }),
+                t.blockStatement(ast)
+              ),
+              t.identifier('call')
+            ),
+            [t.thisExpression()].concat(
+              vars.map(function(v) {
+                return t.conditionalExpression(
+                  t.binaryExpression(
+                    'in',
+                    t.stringLiteral(v),
+                    t.logicalExpression(
+                      '||',
+                      t.identifier(bag),
+                      t.objectExpression([])
+                    )
+                  ),
+                  t.memberExpression(
+                    t.logicalExpression(
+                      '||',
+                      t.identifier(bag),
+                      t.objectExpression([])
+                    ),
+                    t.identifier(v)
+                  ),
+                  t.conditionalExpression(
+                    t.binaryExpression(
+                      '!==',
+                      t.unaryExpression('typeof', t.identifier(v)),
+                      t.stringLiteral('undefined')
+                    ),
+                    t.identifier(v),
+                    t.identifier('undefined')
+                  )
+                );
+              })
+            )
+          )
+        ),
+      ];
+    }
+    return ast;
+  },
+  /**
+   * This method is called once the AST is built in
+   * order to apply transformations
+   * nb: a custom AST walk/replace was written because
+   * the babel plugin architecture
+   * Currently it this transformation :
+   *  - compacts sequential pug_html = pug_html + any (max of 100)
+   *  - further compacts sequential pug_html = pug_html + stringLiteral
+   */
+
+  ast_postprocess: function(ast) {
+    let needCompaction = function(c) {
+      return (
+        t.isExpressionStatement(c) &&
+        t.isAssignmentExpression(c.expression) &&
+        c.expression.left.name === 'pug_html' &&
+        t.isBinaryExpression(c.expression.right) &&
+        c.expression.right.left.name === 'pug_html'
+      );
+    };
+
+    let walk = function(node) {
+      Object.keys(node).forEach(function(k) {
+        var child = node[k];
+        if (child && typeof child === 'object' && child.length) {
+          let i, j;
+          for (i = 0; i < child.length; i++) {
+            let start, end;
+            let fragment = [t.identifier('pug_html')];
+            if (needCompaction(child[i])) {
+              start = i;
+              end = i;
+              // locate sequential buffer operations
+              while (
+                needCompaction(child[end]) &&
+                end < child.length &&
+                fragment.length < 101
+              ) {
+                fragment.push(child[end].expression.right.right);
+                end++;
+              }
+
+              // join adjacent stringLiterals
+              for (j = 0; j < fragment.length; j++) {
+                let start, end;
+                if (t.isStringLiteral(fragment[j])) {
+                  start = j;
+                  end = j;
+                  while (
+                    t.isStringLiteral(fragment[end]) &&
+                    end < fragment.length
+                  ) {
+                    end++;
+                  }
+                  let lit = t.stringLiteral(
+                    fragment
+                      .slice(start, end)
+                      .map(function(v) {
+                        return v.value;
+                      })
+                      .join('')
+                  );
+                  //lit.extra = {rawValue: lit.value, raw: stringify(lit.value)};
+                  fragment.splice(start, end - start, lit);
+                }
+              }
+
+              // join fragments
+              let expr = t.expressionStatement(
+                t.assignmentExpression(
+                  '=',
+                  t.identifier('pug_html'),
+                  fragment.reduce(function(acc, val) {
+                    return t.binaryExpression('+', acc, val);
+                  })
+                )
+              );
+              child.splice(start, end - start, expr);
+            } else if (child[i] && typeof child[i].type === 'string') {
+              walk(child[i]);
+            }
+          }
+        } else if (child && typeof child.type === 'string') {
+          walk(child);
+        }
+      });
+    };
+    walk(ast);
+    return ast;
+  },
   /**
    * Compile parse tree to JavaScript.
    *
@@ -102,10 +318,17 @@ Compiler.prototype = {
    */
 
   compile: function() {
-    this.buf = [];
-    if (this.pp) this.buf.push('var pug_indent = [];');
-    this.lastBufferedIdx = -1;
-    this.visit(this.node);
+    var ast = [];
+    if (this.pp) {
+      ast.push(
+        t.variableDeclaration('var', [
+          t.variableDeclarator(t.identifier('pug_indent'), t.arrayExpression()),
+        ])
+      );
+    }
+
+    push.apply(ast, this.visit(this.node));
+
     if (!this.dynamicMixins) {
       // if there are no dynamic mixins we can remove any un-used mixins
       var mixinNames = Object.keys(this.mixins);
@@ -113,62 +336,100 @@ Compiler.prototype = {
         var mixin = this.mixins[mixinNames[i]];
         if (!mixin.used) {
           for (var x = 0; x < mixin.instances.length; x++) {
-            for (
-              var y = mixin.instances[x].start;
-              y < mixin.instances[x].end;
-              y++
-            ) {
-              this.buf[y] = '';
-            }
+            mixin.instances[x].stmt.type = 'EmptyStatement';
+            delete mixin.instances[x].stmt.expression;
           }
         }
       }
     }
-    var js = this.buf.join('\n');
-    var globals = this.options.globals
-      ? this.options.globals.concat(INTERNAL_VARIABLES)
-      : INTERNAL_VARIABLES;
+
     if (this.options.self) {
-      js = 'var self = locals || {};' + js;
+      ast = [
+        t.variableDeclaration('var', [
+          t.variableDeclarator(
+            t.identifier('self'),
+            t.logicalExpression(
+              '||',
+              t.identifier('locals'),
+              t.objectExpression([])
+            )
+          ),
+        ]),
+      ].concat(ast);
     } else {
-      js = addWith(
-        'locals || {}',
-        js,
-        globals.concat(
-          this.runtimeFunctionsUsed.map(function(name) {
-            return 'pug_' + name;
-          })
-        )
-      );
+      // transform `ast` into `with(locals || {}) { ast }`
+      ast = this.ast_with(ast);
     }
+
     if (this.debug) {
       if (this.options.includeSources) {
-        js =
-          'var pug_debug_sources = ' +
-          stringify(this.options.includeSources) +
-          ';\n' +
-          js;
+        ast.unshift(
+          t.variableDeclaration('var', [
+            t.variableDeclarator(
+              t.identifier('pug_debug_sources'),
+              this.parseExpr(stringify(this.options.includeSources))
+            ),
+          ])
+        );
+      }
+
+      var rethrowArgs = [
+        t.identifier('err'),
+        t.identifier('pug_debug_filename'),
+        t.identifier('pug_debug_line'),
+      ];
+      if (this.options.includeSources) {
+        rethrowArgs.push(
+          t.memberExpression(
+            t.identifier('pug_debug_sources'),
+            t.identifier('pug_debug_filename'),
+            true
+          )
+        );
       }
-      js =
-        'var pug_debug_filename, pug_debug_line;' +
-        'try {' +
-        js +
-        '} catch (err) {' +
-        (this.inlineRuntimeFunctions ? 'pug_rethrow' : 'pug.rethrow') +
-        '(err, pug_debug_filename, pug_debug_line' +
-        (this.options.includeSources
-          ? ', pug_debug_sources[pug_debug_filename]'
-          : '') +
-        ');' +
-        '}';
+      ast = [
+        t.variableDeclaration('var', [
+          t.variableDeclarator(t.identifier('pug_debug_filename'), null),
+          t.variableDeclarator(t.identifier('pug_debug_line'), null),
+        ]),
+        t.tryStatement(
+          t.blockStatement(ast),
+          t.catchClause(
+            t.identifier('err'),
+            t.blockStatement([
+              t.expressionStatement(
+                t.callExpression(
+                  this.inlineRuntimeFunctions
+                    ? t.identifier('pug_rethrow')
+                    : t.memberExpression(
+                        t.identifier('pug'),
+                        t.identifier('rethrow')
+                      ),
+                  rethrowArgs
+                )
+              ),
+            ])
+          )
+        ),
+      ];
     }
+
+    ast = t.functionDeclaration(
+      t.identifier(this.options.templateName || 'template'),
+      this.templateVars.map(function(v) {
+        return t.identifier(v);
+      }),
+      t.blockStatement(
+        [this.ast_variableDeclaration()].concat(ast, this.ast_return())
+      )
+    );
+
+    ast = this.ast_postprocess(ast);
+
     return (
       buildRuntime(this.runtimeFunctionsUsed) +
-      'function ' +
-      (this.options.templateName || 'template') +
-      '(locals) {var pug_html = "", pug_mixins = {}, pug_interp;' +
-      js +
-      ';return pug_html;}'
+      gen.default(ast, {compact: true, jsescOption: {isScriptContext: true}})
+        .code
     );
   },
 
@@ -196,34 +457,9 @@ Compiler.prototype = {
    */
 
   buffer: function(str) {
-    var self = this;
-
-    str = stringify(str);
-    str = str.substr(1, str.length - 2);
-
-    if (
-      this.lastBufferedIdx == this.buf.length &&
-      this.bufferedConcatenationCount < 100
-    ) {
-      if (this.lastBufferedType === 'code') {
-        this.lastBuffered += ' + "';
-        this.bufferedConcatenationCount++;
-      }
-      this.lastBufferedType = 'text';
-      this.lastBuffered += str;
-      this.buf[this.lastBufferedIdx - 1] =
-        'pug_html = pug_html + ' +
-        this.bufferStartChar +
-        this.lastBuffered +
-        '";';
-    } else {
-      this.bufferedConcatenationCount = 0;
-      this.buf.push('pug_html = pug_html + "' + str + '";');
-      this.lastBufferedType = 'text';
-      this.bufferStartChar = '"';
-      this.lastBuffered = str;
-      this.lastBufferedIdx = this.buf.length;
-    }
+    const lit = t.stringLiteral(str);
+    //lit.extra = {rawValue: lit.value, raw: stringify(lit.value)};
+    return this.ast_buffer(lit);
   },
 
   /**
@@ -237,27 +473,13 @@ Compiler.prototype = {
     if (isConstant(src)) {
       return this.buffer(toConstant(src) + '');
     }
-    if (
-      this.lastBufferedIdx == this.buf.length &&
-      this.bufferedConcatenationCount < 100
-    ) {
-      this.bufferedConcatenationCount++;
-      if (this.lastBufferedType === 'text') this.lastBuffered += '"';
-      this.lastBufferedType = 'code';
-      this.lastBuffered += ' + (' + src + ')';
-      this.buf[this.lastBufferedIdx - 1] =
-        'pug_html = pug_html + (' +
-        this.bufferStartChar +
-        this.lastBuffered +
-        ');';
-    } else {
-      this.bufferedConcatenationCount = 0;
-      this.buf.push('pug_html = pug_html + (' + src + ');');
-      this.lastBufferedType = 'code';
-      this.bufferStartChar = '';
-      this.lastBuffered = '(' + src + ')';
-      this.lastBufferedIdx = this.buf.length;
-    }
+    var body = this.parseExpr(src);
+    var ast = this.ast_buffer(body);
+    return ast;
+  },
+
+  bufferAST: function(ast) {
+    return this.ast_buffer(ast);
   },
 
   /**
@@ -270,11 +492,27 @@ Compiler.prototype = {
    */
 
   prettyIndent: function(offset, newline) {
+    var ast;
     offset = offset || 0;
     newline = newline ? '\n' : '';
-    this.buffer(newline + Array(this.indents + offset).join(this.pp));
-    if (this.parentIndents)
-      this.buf.push('pug_html = pug_html + pug_indent.join("");');
+    ast = concat.apply(
+      [],
+      [
+        this.buffer(newline + Array(this.indents + offset).join(this.pp)),
+        this.parentIndents
+          ? this.ast_buffer(
+              t.callExpression(
+                t.memberExpression(
+                  t.identifier('pug_indent'),
+                  t.identifier('join')
+                ),
+                [t.stringLiteral('')]
+              )
+            )
+          : [],
+      ]
+    );
+    return ast;
   },
 
   /**
@@ -284,9 +522,13 @@ Compiler.prototype = {
    * @api public
    */
 
+  visitCacheLine: JSON.stringify(babelTemplate.ast(`pug_debug_line = 1;`)),
+  visitCacheFilename: JSON.stringify(
+    babelTemplate.ast(`pug_debug_filename = "";`)
+  ),
   visit: function(node, parent) {
+    var ast = [];
     var debug = this.debug;
-
     if (!node) {
       var msg;
       if (parent) {
@@ -307,10 +549,17 @@ Compiler.prototype = {
 
     if (debug && node.debug !== false && node.type !== 'Block') {
       if (node.line) {
-        var js = ';pug_debug_line = ' + node.line;
-        if (node.filename)
-          js += ';pug_debug_filename = ' + stringify(node.filename);
-        this.buf.push(js + ';');
+        const astLine = JSON.parse(this.visitCacheLine);
+        astLine.expression.right.value = node.line;
+        astLine.expression.right.extra = null;
+        ast.push(astLine);
+
+        if (node.filename) {
+          const astFile = JSON.parse(this.visitCacheFilename);
+          astFile.expression.right.value = node.filename;
+          astFile.expression.right.extra = null;
+          ast.push(astFile);
+        }
       }
     }
 
@@ -345,7 +594,9 @@ Compiler.prototype = {
       throw new TypeError(msg);
     }
 
-    this.visitNode(node);
+    const res = this.visitNode(node, parent);
+    unshift.apply(res, ast);
+    return res;
   },
 
   /**
@@ -355,8 +606,9 @@ Compiler.prototype = {
    * @api public
    */
 
-  visitNode: function(node) {
-    return this['visit' + node.type](node);
+  visitNode: function(node, parent) {
+    //console.log('visit', node.type)
+    return this['visit' + node.type](node, parent);
   },
 
   /**
@@ -367,9 +619,11 @@ Compiler.prototype = {
    */
 
   visitCase: function(node) {
-    this.buf.push('switch (' + node.expr + '){');
-    this.visit(node.block, node);
-    this.buf.push('}');
+    var stmt = t.switchStatement(
+      node.astExpr || this.parseExpr(node.expr),
+      this.visit(node.block, node)
+    );
+    return [stmt];
   },
 
   /**
@@ -380,15 +634,17 @@ Compiler.prototype = {
    */
 
   visitWhen: function(node) {
-    if ('default' == node.expr) {
-      this.buf.push('default:');
-    } else {
-      this.buf.push('case ' + node.expr + ':');
+    var test = null;
+    if ('default' != node.expr) {
+      test = node.astExpr || this.parseExpr(node.expr);
     }
+    var consequent = [];
     if (node.block) {
-      this.visit(node.block, node);
-      this.buf.push('  break;');
+      consequent = this.visit(node.block, node);
+      consequent.push(t.breakStatement());
     }
+    var c = t.switchCase(test, consequent);
+    return [c];
   },
 
   /**
@@ -399,7 +655,7 @@ Compiler.prototype = {
    */
 
   visitLiteral: function(node) {
-    this.buffer(node.str);
+    return this.buffer(node.str);
   },
 
   visitNamedBlock: function(block) {
@@ -415,7 +671,7 @@ Compiler.prototype = {
   visitBlock: function(block) {
     var escapePrettyMode = this.escapePrettyMode;
     var pp = this.pp;
-
+    var ast = [];
     // Pretty print multi-line text
     if (
       pp &&
@@ -424,10 +680,13 @@ Compiler.prototype = {
       block.nodes[0].type === 'Text' &&
       block.nodes[1].type === 'Text'
     ) {
-      this.prettyIndent(1, true);
+      push.apply(ast, this.prettyIndent(1, true));
     }
+    //console.log('start block')
+    const blocks = Array(2 * block.nodes.length);
     for (var i = 0; i < block.nodes.length; ++i) {
       // Pretty print text
+      blocks[2 * i] = [];
       if (
         pp &&
         i > 0 &&
@@ -436,10 +695,13 @@ Compiler.prototype = {
         block.nodes[i - 1].type === 'Text' &&
         /\n$/.test(block.nodes[i - 1].val)
       ) {
-        this.prettyIndent(1, false);
+        blocks[2 * i] = this.prettyIndent(1, false);
       }
-      this.visit(block.nodes[i], block);
+      const b = this.visit(block.nodes[i], block);
+      blocks[2 * i + 1] = b;
     }
+    ast = ast.concat.apply(ast, blocks);
+    return ast;
   },
 
   /**
@@ -450,12 +712,40 @@ Compiler.prototype = {
    */
 
   visitMixinBlock: function(block) {
-    if (this.pp)
-      this.buf.push(
-        "pug_indent.push('" + Array(this.indents + 1).join(this.pp) + "');"
+    var ast = [];
+    if (this.pp) {
+      ast.push(
+        t.expressionStatement(
+          t.callExpression(
+            t.memberExpression(
+              t.identifier('pug_indent'),
+              t.identifier('push')
+            ),
+            [t.stringLiteral(Array(this.indents + 1).join(this.pp))]
+          )
+        )
+      );
+    }
+    ast.push(
+      t.expressionStatement(
+        t.logicalExpression(
+          '&&',
+          t.identifier('block'),
+          this.wrapCallExpression(t.callExpression(t.identifier('block'), []))
+        )
+      )
+    );
+    if (this.pp) {
+      ast.push(
+        t.expressionStatement(
+          t.callExpression(
+            t.memberExpression(t.identifier('pug_indent'), t.identifier('pop')),
+            []
+          )
+        )
       );
-    this.buf.push('block && block();');
-    if (this.pp) this.buf.push('pug_indent.pop();');
+    }
+    return ast;
   },
 
   /**
@@ -468,12 +758,14 @@ Compiler.prototype = {
    */
 
   visitDoctype: function(doctype) {
+    var ast = [];
     if (doctype && (doctype.val || !this.doctype)) {
       this.setDoctype(doctype.val || 'html');
     }
 
-    if (this.doctype) this.buffer(this.doctype);
+    if (this.doctype) ast = [this.buffer(this.doctype)];
     this.hasCompiledDoctype = true;
+    return ast;
   },
 
   /**
@@ -485,6 +777,8 @@ Compiler.prototype = {
    */
 
   visitMixin: function(mixin) {
+    var ast = [];
+    var self = this;
     var name = 'pug_mixins[';
     var args = mixin.args || '';
     var block = mixin.block;
@@ -498,33 +792,77 @@ Compiler.prototype = {
       (dynamic
         ? mixin.name.substr(2, mixin.name.length - 3)
         : '"' + mixin.name + '"') + ']';
-
+    var mixinName = dynamic
+      ? mixin.astName ||
+        this.parseExpr(mixin.name.substr(2, mixin.name.length - 3))
+      : t.stringLiteral(mixin.name);
     this.mixins[key] = this.mixins[key] || {used: false, instances: []};
+
+    // mixin invocation
     if (mixin.call) {
       this.mixins[key].used = true;
-      if (pp)
-        this.buf.push(
-          "pug_indent.push('" + Array(this.indents + 1).join(pp) + "');"
+      if (pp) {
+        ast.push(
+          t.expressionStatement(
+            t.callExpression(
+              t.memberExpression(
+                t.identifier('pug_indent'),
+                t.identifier('push')
+              ),
+              [t.stringLiteral(Array(this.indents + 1).join(pp))]
+            )
+          )
         );
+      }
       if (block || attrs.length || attrsBlocks.length) {
-        this.buf.push(name + '.call({');
+        var astArgs = [];
+        ast.push(
+          t.expressionStatement(
+            this.wrapCallExpression(
+              t.callExpression(
+                t.memberExpression(
+                  t.memberExpression(
+                    t.identifier('pug_mixins'),
+                    mixinName,
+                    true
+                  ),
+                  t.identifier('call')
+                ),
+                astArgs
+              )
+            )
+          )
+        );
+
+        var astObj, astKey;
+        if (block || attrsBlocks.length || attrs.length) {
+          astKey = [];
+          astObj = t.objectExpression(astKey);
+          astArgs.push(astObj);
+        }
 
         if (block) {
-          this.buf.push('block: function(){');
+          var astFunc = [];
 
           // Render block with no indents, dynamically added when rendered
           this.parentIndents++;
           var _indents = this.indents;
           this.indents = 0;
-          this.visit(mixin.block, mixin);
+          push.apply(astFunc, this.visit(mixin.block, mixin));
           this.indents = _indents;
           this.parentIndents--;
 
-          if (attrs.length || attrsBlocks.length) {
-            this.buf.push('},');
-          } else {
-            this.buf.push('}');
-          }
+          astKey.push(
+            t.objectProperty(
+              t.identifier('block'),
+              t.functionExpression(
+                null,
+                [],
+                t.blockStatement(astFunc),
+                this.useGenerators
+              )
+            )
+          );
         }
 
         if (attrsBlocks.length) {
@@ -533,32 +871,68 @@ Compiler.prototype = {
             attrsBlocks.unshift(val);
           }
           if (attrsBlocks.length > 1) {
-            this.buf.push(
-              'attributes: ' +
-                this.runtime('merge') +
-                '([' +
-                attrsBlocks.join(',') +
-                '])'
+            astKey.push(
+              t.objectProperty(
+                t.identifier('attributes'),
+                t.callExpression(
+                  this.runtime('merge', true),
+                  attrsBlocks.map(function(b) {
+                    return self.parseExpr(b);
+                  })
+                )
+              )
             );
           } else {
-            this.buf.push('attributes: ' + attrsBlocks[0]);
+            astKey.push(
+              t.objectProperty(
+                t.identifier('attributes'),
+                this.parseExpr(attrsBlocks[0])
+              )
+            );
           }
         } else if (attrs.length) {
           var val = this.attrs(attrs);
-          this.buf.push('attributes: ' + val);
+          astKey.push(
+            t.objectProperty(t.identifier('attributes'), this.parseExpr(val))
+          );
         }
 
         if (args) {
-          this.buf.push('}, ' + args + ');');
-        } else {
-          this.buf.push('});');
+          args = args ? args.split(',') : [];
+          Array.prototype.push.apply(
+            astArgs,
+            mixin.astArgs || this.parseArgs(args)
+          );
         }
       } else {
-        this.buf.push(name + '(' + args + ');');
+        var astArgs = mixin.astArgs || this.parseArgs(args);
+        ast.push(
+          t.expressionStatement(
+            this.wrapCallExpression(
+              t.callExpression(
+                t.memberExpression(t.identifier('pug_mixins'), mixinName, true),
+                astArgs
+              )
+            )
+          )
+        );
       }
-      if (pp) this.buf.push('pug_indent.pop();');
-    } else {
-      var mixin_start = this.buf.length;
+      if (pp) {
+        ast.push(
+          t.expressionStatement(
+            t.callExpression(
+              t.memberExpression(
+                t.identifier('pug_indent'),
+                t.identifier('pop')
+              ),
+              []
+            )
+          )
+        );
+      }
+    }
+    // mixin definition
+    else {
       args = args ? args.split(',') : [];
       var rest;
       if (args.length && /^\.\.\./.test(args[args.length - 1].trim())) {
@@ -567,29 +941,104 @@ Compiler.prototype = {
           .trim()
           .replace(/^\.\.\./, '');
       }
+      var astArgs = args.map(function(arg) {
+        return t.identifier(arg.trim());
+      });
       // we need use pug_interp here for v8: https://code.google.com/p/v8/issues/detail?id=4165
       // once fixed, use this: this.buf.push(name + ' = function(' + args.join(',') + '){');
-      this.buf.push(name + ' = pug_interp = function(' + args.join(',') + '){');
-      this.buf.push(
-        'var block = (this && this.block), attributes = (this && this.attributes) || {};'
+      var astMixin = [];
+
+      astMixin.push(
+        t.variableDeclaration('var', [
+          t.variableDeclarator(
+            t.identifier('block'),
+            t.logicalExpression(
+              '&&',
+              t.thisExpression(),
+              t.memberExpression(t.thisExpression(), t.identifier('block'))
+            )
+          ),
+          t.variableDeclarator(
+            t.identifier('attributes'),
+            t.logicalExpression(
+              '||',
+              t.logicalExpression(
+                '&&',
+                t.thisExpression(),
+                t.memberExpression(
+                  t.thisExpression(),
+                  t.identifier('attributes')
+                )
+              ),
+              t.objectExpression([])
+            )
+          ),
+        ])
       );
+
       if (rest) {
-        this.buf.push('var ' + rest + ' = [];');
-        this.buf.push(
-          'for (pug_interp = ' +
-            args.length +
-            '; pug_interp < arguments.length; pug_interp++) {'
+        astMixin.push(
+          t.variableDeclaration('var', [
+            t.variableDeclarator(t.identifier(rest), t.arrayExpression([])),
+          ])
+        );
+        astMixin.push(
+          t.forStatement(
+            t.assignmentExpression(
+              '=',
+              t.identifier('pug_interp'),
+              t.numericLiteral(args.length)
+            ),
+            t.binaryExpression(
+              '<',
+              t.identifier('pug_interp'),
+              t.memberExpression(
+                t.identifier('arguments'),
+                t.identifier('length')
+              )
+            ),
+            t.updateExpression('++', t.identifier('pug_interp'), false),
+            t.expressionStatement(
+              t.callExpression(
+                t.memberExpression(t.identifier(rest), t.identifier('push')),
+                [
+                  t.memberExpression(
+                    t.identifier('arguments'),
+                    t.identifier('pug_interp'),
+                    true
+                  ),
+                ]
+              )
+            )
+          )
         );
-        this.buf.push('  ' + rest + '.push(arguments[pug_interp]);');
-        this.buf.push('}');
       }
+
       this.parentIndents++;
-      this.visit(block, mixin);
+      push.apply(astMixin, this.visit(block, mixin));
       this.parentIndents--;
-      this.buf.push('};');
-      var mixin_end = this.buf.length;
-      this.mixins[key].instances.push({start: mixin_start, end: mixin_end});
+
+      var mixinStmt = t.expressionStatement(
+        t.assignmentExpression(
+          '=',
+          t.memberExpression(t.identifier('pug_mixins'), mixinName, true),
+          t.assignmentExpression(
+            '=',
+            t.identifier('pug_interp'),
+            t.functionExpression(
+              null,
+              astArgs,
+              t.blockStatement(astMixin),
+              this.useGenerators
+            )
+          )
+        )
+      );
+      ast.push(mixinStmt);
+
+      this.mixins[key].instances.push({stmt: mixinStmt});
     }
+    return ast;
   },
 
   /**
@@ -601,15 +1050,18 @@ Compiler.prototype = {
    * @api public
    */
 
-  visitTag: function(tag, interpolated) {
+  visitTag: function(tag, parent, interpolated) {
     this.indents++;
     var name = tag.name,
       pp = this.pp,
       self = this;
+    var ast = [];
 
     function bufferName() {
-      if (interpolated) self.bufferExpression(tag.expr);
-      else self.buffer(name);
+      if (interpolated) {
+        if (tag.astExpr) return self.bufferAST(tag.astExpr);
+        return self.bufferExpression(tag.expr);
+      } else return self.buffer(name);
     }
 
     if (WHITE_SPACE_SENSITIVE_TAGS[tag.name] === true)
@@ -617,25 +1069,23 @@ Compiler.prototype = {
 
     if (!this.hasCompiledTag) {
       if (!this.hasCompiledDoctype && 'html' == name) {
-        this.visitDoctype();
+        push.apply(ast, this.visitDoctype());
       }
       this.hasCompiledTag = true;
     }
-
     // pretty print
-    if (pp && !tag.isInline) this.prettyIndent(0, true);
+    if (pp && !tag.isInline) push.apply(ast, this.prettyIndent(0, true));
     if (tag.selfClosing || (!this.xml && selfClosing[tag.name])) {
-      this.buffer('<');
-      bufferName();
-      this.visitAttributes(
-        tag.attrs,
-        this.attributeBlocks(tag.attributeBlocks)
-      );
-      if (this.terse && !tag.selfClosing) {
-        this.buffer('>');
-      } else {
-        this.buffer('/>');
-      }
+      ast = concat.apply(ast, [
+        this.buffer('<'),
+        bufferName(),
+        this.visitAttributes(
+          tag.attrs,
+          this.attributeBlocks(tag.attributeBlocks)
+        ),
+        this.buffer(this.terse && !tag.selfClosing ? '>' : '/>'),
+      ]);
+
       // if it is non-empty throw an error
       if (
         tag.code ||
@@ -656,36 +1106,46 @@ Compiler.prototype = {
       }
     } else {
       // Optimize attributes buffering
-      this.buffer('<');
-      bufferName();
-      this.visitAttributes(
-        tag.attrs,
-        this.attributeBlocks(tag.attributeBlocks)
-      );
-      this.buffer('>');
-      if (tag.code) this.visitCode(tag.code);
-      this.visit(tag.block, tag);
-
-      // pretty print
-      if (
+      ast = concat.apply(ast, [
+        this.buffer('<'),
+        bufferName(),
+        this.visitAttributes(
+          tag.attrs,
+          this.attributeBlocks(tag.attributeBlocks)
+        ),
+        this.buffer('>'),
+        tag.code ? this.visitCode(tag.code) : [],
+        this.visit(tag.block, tag),
         pp &&
         !tag.isInline &&
         WHITE_SPACE_SENSITIVE_TAGS[tag.name] !== true &&
         !tagCanInline(tag)
-      )
-        this.prettyIndent(0, true);
-
-      this.buffer('</');
-      bufferName();
-      this.buffer('>');
+          ? this.prettyIndent(0, true)
+          : [],
+        this.buffer('</'),
+        bufferName(),
+        this.buffer('>'),
+      ]);
     }
 
     if (WHITE_SPACE_SENSITIVE_TAGS[tag.name] === true)
       this.escapePrettyMode = false;
 
     this.indents--;
+    return ast;
   },
 
+  /**
+   *  Compile attribute blocks.
+   */
+  attributeBlocks: function(attributeBlocks) {
+    return (
+      attributeBlocks &&
+      attributeBlocks.slice().map(function(attrBlock) {
+        return attrBlock.val;
+      })
+    );
+  },
   /**
    * Visit InterpolatedTag.
    *
@@ -693,8 +1153,8 @@ Compiler.prototype = {
    * @api public
    */
 
-  visitInterpolatedTag: function(tag) {
-    return this.visitTag(tag, true);
+  visitInterpolatedTag: function(tag, parent) {
+    return this.visitTag(tag, parent, true);
   },
 
   /**
@@ -705,7 +1165,7 @@ Compiler.prototype = {
    */
 
   visitText: function(text) {
-    this.buffer(text.val);
+    return this.buffer(text.val);
   },
 
   /**
@@ -717,8 +1177,13 @@ Compiler.prototype = {
 
   visitComment: function(comment) {
     if (!comment.buffer) return;
-    if (this.pp) this.prettyIndent(1, true);
-    this.buffer('<!--' + comment.val + '-->');
+    return concat.apply(
+      [],
+      [
+        this.pp ? this.prettyIndent(1, true) : [],
+        this.buffer('<!--' + comment.val + '-->'),
+      ]
+    );
   },
 
   /**
@@ -730,7 +1195,9 @@ Compiler.prototype = {
    * @api public
    */
 
-  visitYieldBlock: function(block) {},
+  visitYieldBlock: function(block) {
+    return [];
+  },
 
   /**
    * Visit a `BlockComment`.
@@ -740,12 +1207,16 @@ Compiler.prototype = {
    */
 
   visitBlockComment: function(comment) {
+    var ast = [];
     if (!comment.buffer) return;
-    if (this.pp) this.prettyIndent(1, true);
-    this.buffer('<!--' + (comment.val || ''));
-    this.visit(comment.block, comment);
-    if (this.pp) this.prettyIndent(1, true);
-    this.buffer('-->');
+    ast = ast.concat.apply(ast, [
+      this.pp ? this.prettyIndent(1, true) : [],
+      this.buffer('<!--' + (comment.val || '')),
+      this.visit(comment.block, comment),
+      this.pp ? this.prettyIndent(1, true) : [],
+      this.buffer('-->'),
+    ]);
+    return ast;
   },
 
   /**
@@ -757,28 +1228,84 @@ Compiler.prototype = {
    * @api public
    */
 
-  visitCode: function(code) {
+  visitCode: function(code, ctx) {
     // Wrap code blocks with {}.
     // we only wrap unbuffered code blocks ATM
     // since they are usually flow control
-
     // Buffer code
+    //
+    var ast = [];
     if (code.buffer) {
       var val = code.val.trim();
-      val = 'null == (pug_interp = ' + val + ') ? "" : pug_interp';
-      if (code.mustEscape !== false)
-        val = this.runtime('escape') + '(' + val + ')';
-      this.bufferExpression(val);
+      if (code.mustEscape !== false) {
+        ast = JSON.parse(tpl_json_interp_escape).expression;
+        ast.callee = this.runtime('escape', true);
+        ast.arguments[0].test.right.right =
+          code.astVal || this.parseExpr(code.val);
+      } else {
+        ast = JSON.parse(tpl_json_interp).expression;
+        ast.test.right.right = code.astVal || this.parseExpr(code.val);
+      }
+      ast = [this.bufferAST(ast)];
     } else {
-      this.buf.push(code.val);
-    }
+      var val = code.val.trim();
+      this.codeBuffer += '\n' + val;
+
+      if (code.block) {
+        this.codeIndex++;
+        var marker = 'PUGMARKER' + this.codeIndex;
+        this.codeBuffer += '\n{' + marker + '}\n';
+        // snaphsot current unbuffered code level
+        // this is necessary to accept embedded code blocks
+        // - if (true) {
+        //   - var a = 1;
+        // - }
+        // but breaks the "should be reasonably fast" compile test
+        // note: we should add a test for this in pug
+        var savedCodeBuffer = this.codeBuffer;
+        var savedCodeMarker = this.codeMarker;
+        var savedCodeIndex = this.codeIndex;
+
+        this.codeBuffer = 'plug=function*(){';
+        this.codeMarker = {};
+        this.codeIndex = -1;
+
+        var body = this.visit(code.block, code);
+
+        this.codeBuffer = savedCodeBuffer;
+        this.codeMarker = savedCodeMarker;
+        this.codeIndex = savedCodeIndex;
+
+        this.codeMarker[marker] = body;
+      }
 
-    // Block support
-    if (code.block) {
-      if (!code.buffer) this.buf.push('{');
-      this.visit(code.block, code);
-      if (!code.buffer) this.buf.push('}');
+      var idx = ctx.nodes.indexOf(code) + 1;
+      if (
+        idx == ctx.nodes.length ||
+        ctx.nodes[idx].type != 'Code' ||
+        ctx.nodes[idx].buffer
+      ) {
+        try {
+          var src = this.codeBuffer + '}';
+          var tpl = babelTemplate(src);
+          push.apply(ast, tpl(this.codeMarker).expression.right.body.body);
+          this.codeBuffer = 'plug=function*(){';
+          this.codeIndex = -1;
+          this.codeMarker = {};
+        } catch (e) {
+          var codeError = this.codeBuffer.substr(14).trim();
+          this.error(
+            'Unbuffered code structure could not be parsed; ' +
+              e.message +
+              ' in ' +
+              codeError,
+            codeError,
+            code
+          );
+        }
+      }
     }
+    return ast;
   },
 
   /**
@@ -790,19 +1317,22 @@ Compiler.prototype = {
 
   visitConditional: function(cond) {
     var test = cond.test;
-    this.buf.push('if (' + test + ') {');
-    this.visit(cond.consequent, cond);
-    this.buf.push('}');
+
+    var blockConsequent = this.visit(cond.consequent, cond);
+    var c = t.ifStatement(
+      cond.astTest || this.parseExpr(test),
+      t.blockStatement(blockConsequent)
+    );
+
     if (cond.alternate) {
       if (cond.alternate.type === 'Conditional') {
-        this.buf.push('else');
-        this.visitConditional(cond.alternate);
+        c.alternate = this.visitConditional(cond.alternate)[0];
       } else {
-        this.buf.push('else {');
-        this.visit(cond.alternate, cond);
-        this.buf.push('}');
+        var blockAlternate = this.visit(cond.alternate, cond);
+        c.alternate = t.blockStatement(blockAlternate);
       }
     }
+    return [c];
   },
 
   /**
@@ -814,9 +1344,12 @@ Compiler.prototype = {
 
   visitWhile: function(loop) {
     var test = loop.test;
-    this.buf.push('while (' + test + ') {');
-    this.visit(loop.block, loop);
-    this.buf.push('}');
+    var whileBlock = this.visit(loop.block, loop);
+    var w = t.whileStatement(
+      loop.astTest || this.parseExpr(test),
+      t.blockStatement(whileBlock)
+    );
+    return [w];
   },
 
   /**
@@ -827,93 +1360,148 @@ Compiler.prototype = {
    */
 
   visitEach: function(each) {
+    var ast = [];
     var indexVarName = each.key || 'pug_index' + this.eachCount;
     this.eachCount++;
 
-    this.buf.push(
-      '' +
-        '// iterate ' +
-        each.obj +
-        '\n' +
-        ';(function(){\n' +
-        '  var $$obj = ' +
-        each.obj +
-        ';\n' +
-        "  if ('number' == typeof $$obj.length) {"
+    var body = [
+      t.variableDeclaration('var', [
+        t.variableDeclarator(
+          t.identifier('$$obj'),
+          each.astObj || this.parseExpr(each.obj)
+        ),
+      ]),
+    ];
+
+    var func = t.expressionStatement(
+      this.wrapCallExpression(
+        t.callExpression(
+          t.memberExpression(
+            t.functionExpression(
+              null,
+              [],
+              t.blockStatement(body),
+              this.useGenerators
+            ),
+            t.identifier('call')
+          ),
+          [t.thisExpression()]
+        )
+      )
     );
+    ast.push(func);
+
+    var blockEach = [
+      t.variableDeclaration('var', [
+        t.variableDeclarator(
+          t.identifier(each.val),
+          t.memberExpression(
+            t.identifier('$$obj'),
+            t.identifier(indexVarName),
+            true
+          )
+        ),
+      ]),
+    ];
+    var blockAlt = [];
+
+    push.apply(blockEach, this.visit(each.block, each));
+    var arrayLoop = t.blockStatement([
+      t.forStatement(
+        t.variableDeclaration('var', [
+          t.variableDeclarator(t.identifier(indexVarName), t.numericLiteral(0)),
+          t.variableDeclarator(
+            t.identifier('$$l'),
+            t.memberExpression(t.identifier('$$obj'), t.identifier('length'))
+          ),
+        ]),
+        t.binaryExpression(
+          '<',
+          t.identifier(indexVarName),
+          t.identifier('$$l')
+        ),
+        t.updateExpression('++', t.identifier(indexVarName), false),
+        t.blockStatement(blockEach)
+      ),
+    ]);
+
+    var blockObj = [
+      t.expressionStatement(
+        t.updateExpression('++', t.identifier('$$l'), false)
+      ),
+      t.variableDeclaration('var', [
+        t.variableDeclarator(
+          t.identifier(each.val),
+          t.memberExpression(
+            t.identifier('$$obj'),
+            t.identifier(indexVarName),
+            true
+          )
+        ),
+      ]),
+    ];
+    var blockObjAlt = [];
+
+    push.apply(blockObj, this.visit(each.block, each));
+    var objectLoop = t.blockStatement([
+      t.variableDeclaration('var', [
+        t.variableDeclarator(t.identifier('$$l'), t.numericLiteral(0)),
+      ]),
+      t.forInStatement(
+        t.variableDeclaration('var', [
+          t.variableDeclarator(t.identifier(indexVarName)),
+        ]),
+        t.identifier('$$obj'),
+        t.blockStatement(blockObj)
+      ),
+    ]);
 
     if (each.alternate) {
-      this.buf.push('    if ($$obj.length) {');
+      push.apply(blockAlt, this.visit(each.alternate, each));
+      arrayLoop = t.ifStatement(
+        t.memberExpression(t.identifier('$$obj'), t.identifier('length')),
+        arrayLoop,
+        t.blockStatement(blockAlt)
+      );
     }
 
-    this.buf.push(
-      '' +
-        '      for (var ' +
-        indexVarName +
-        ' = 0, $$l = $$obj.length; ' +
-        indexVarName +
-        ' < $$l; ' +
-        indexVarName +
-        '++) {\n' +
-        '        var ' +
-        each.val +
-        ' = $$obj[' +
-        indexVarName +
-        '];'
-    );
-
-    this.visit(each.block, each);
-
-    this.buf.push('      }');
-
     if (each.alternate) {
-      this.buf.push('    } else {');
-      this.visit(each.alternate, each);
-      this.buf.push('    }');
+      push.apply(blockObjAlt, this.visit(each.alternate, each));
+      objectLoop.body.push(
+        t.ifStatement(
+          t.binaryExpression('===', t.identifier('$$l'), t.numericLiteral(0)),
+          t.blockStatement(blockObjAlt)
+        )
+      );
     }
 
-    this.buf.push(
-      '' +
-        '  } else {\n' +
-        '    var $$l = 0;\n' +
-        '    for (var ' +
-        indexVarName +
-        ' in $$obj) {\n' +
-        '      $$l++;\n' +
-        '      var ' +
-        each.val +
-        ' = $$obj[' +
-        indexVarName +
-        '];'
+    var it = t.ifStatement(
+      t.binaryExpression(
+        '==',
+        t.stringLiteral('number'),
+        t.unaryExpression(
+          'typeof',
+          t.memberExpression(t.identifier('$$obj'), t.identifier('length'))
+        )
+      ),
+      arrayLoop,
+      objectLoop
     );
+    body.push(it);
 
-    this.visit(each.block, each);
-
-    this.buf.push('    }');
-    if (each.alternate) {
-      this.buf.push('    if ($$l === 0) {');
-      this.visit(each.alternate, each);
-      this.buf.push('    }');
-    }
-    this.buf.push('  }\n}).call(this);\n');
+    return ast;
   },
 
   visitEachOf: function(each) {
-    this.buf.push(
-      '' +
-        '// iterate ' +
-        each.obj +
-        '\n' +
-        'for (const ' +
-        each.val +
-        ' of ' +
-        each.obj +
-        ') {\n'
+    const forOfBlock = this.visit(each.block, each);
+    const forOf = t.forOfStatement(
+      t.variableDeclaration('var', [
+        t.variableDeclarator(t.identifier(each.val)),
+      ]),
+      t.identifier(each.obj),
+      t.blockStatement(forOfBlock)
     );
-
-    this.visit(each.block, each);
-
-    this.buf.push('}\n');
+    return forOf;
   },
 
   /**
@@ -924,13 +1512,14 @@ Compiler.prototype = {
    */
 
   visitAttributes: function(attrs, attributeBlocks) {
+    let ast = [];
     if (attributeBlocks.length) {
       if (attrs.length) {
         var val = this.attrs(attrs);
         attributeBlocks.unshift(val);
       }
       if (attributeBlocks.length > 1) {
-        this.bufferExpression(
+        ast = this.bufferExpression(
           this.runtime('attrs') +
             '(' +
             this.runtime('merge') +
@@ -941,7 +1530,7 @@ Compiler.prototype = {
             ')'
         );
       } else {
-        this.bufferExpression(
+        ast = this.bufferExpression(
           this.runtime('attrs') +
             '(' +
             attributeBlocks[0] +
@@ -951,8 +1540,9 @@ Compiler.prototype = {
         );
       }
     } else if (attrs.length) {
-      this.attrs(attrs, true);
+      ast = this.bufferExpression(this.attrs(attrs, true));
     }
+    return ast;
   },
 
   /**
@@ -965,24 +1555,8 @@ Compiler.prototype = {
       format: buffer ? 'html' : 'object',
       runtime: this.runtime.bind(this),
     });
-    if (buffer) {
-      this.bufferExpression(res);
-    }
     return res;
   },
-
-  /**
-   * Compile attribute blocks.
-   */
-
-  attributeBlocks: function(attributeBlocks) {
-    return (
-      attributeBlocks &&
-      attributeBlocks.slice().map(function(attrBlock) {
-        return attrBlock.val;
-      })
-    );
-  },
 };
 
 function tagCanInline(tag) {
diff --git a/packages/pug-code-gen/package.json b/packages/pug-code-gen/package.json
index e0f3d9991..0ef4e8066 100644
--- a/packages/pug-code-gen/package.json
+++ b/packages/pug-code-gen/package.json
@@ -6,6 +6,11 @@
     "pug"
   ],
   "dependencies": {
+    "@babel/core": "^7.10.2",
+    "@babel/generator": "^7.10.2",
+    "@babel/template": "^7.10.1",
+    "@babel/types": "^7.10.2",
+    "@babel/parser": "^7.10.2",
     "constantinople": "^4.0.1",
     "doctypes": "^1.1.0",
     "js-stringify": "^1.0.2",
@@ -13,7 +18,7 @@
     "pug-error": "^1.3.3",
     "pug-runtime": "^2.0.5",
     "void-elements": "^3.1.0",
-    "with": "^7.0.0"
+    "with": "^7.0.2"
   },
   "files": [
     "index.js"
diff --git a/packages/pug-lexer/index.js b/packages/pug-lexer/index.js
index 07afac50e..fda17706c 100644
--- a/packages/pug-lexer/index.js
+++ b/packages/pug-lexer/index.js
@@ -1,7 +1,7 @@
 'use strict';
 
 var assert = require('assert');
-var isExpression = require('is-expression');
+var babylon = require('@babel/parser');
 var characterParser = require('character-parser');
 var error = require('pug-error');
 
@@ -72,21 +72,17 @@ Lexer.prototype = {
     if (!value) this.error('ASSERT_FAILED', message);
   },
 
-  isExpression: function(exp) {
-    return isExpression(exp, {
-      throw: true,
-    });
+  parseExpression: function(exp) {
+    return babylon.parseExpression(exp);
   },
 
   assertExpression: function(exp, noThrow) {
     //this verifies that a JavaScript expression is valid
     try {
-      this.callLexerFunction('isExpression', exp);
-      return true;
+      return this.callLexerFunction('parseExpression', exp);
     } catch (ex) {
       if (noThrow) return false;
 
-      // not coming from acorn
       if (!ex.loc) throw ex;
 
       this.incrementLine(ex.loc.line - 1);
@@ -118,7 +114,7 @@ Lexer.prototype = {
    * @api private
    */
 
-  tok: function(type, val) {
+  tok: function(type, val, ast) {
     var res = {
       type: type,
       loc: {
@@ -131,6 +127,7 @@ Lexer.prototype = {
     };
 
     if (val !== undefined) res.val = val;
+    if (ast !== undefined) res.ast = ast;
 
     return res;
   },
@@ -367,13 +364,14 @@ Lexer.prototype = {
    */
 
   interpolation: function() {
+    var ast;
     if (/^#\{/.test(this.input)) {
       var match = this.bracketExpression(1);
       this.consume(match.end + 1);
-      var tok = this.tok('interpolation', match.src);
+      ast = this.assertExpression(match.src);
+      var tok = this.tok('interpolation', match.src, ast);
       this.tokens.push(tok);
       this.incrementColumn(2); // '#{'
-      this.assertExpression(match.src);
 
       var splitted = match.src.split('\n');
       var lines = splitted.length - 1;
@@ -619,7 +617,7 @@ Lexer.prototype = {
       tok.mustEscape = matchOfStringInterp[2] === '#';
       tok.buffer = true;
       tok.val = range.src;
-      this.assertExpression(range.src);
+      tok.ast = this.assertExpression(range.src);
 
       if (range.end + 1 < rest.length) {
         rest = rest.substr(range.end + 1);
@@ -851,7 +849,7 @@ Lexer.prototype = {
     var tok = this.scanEndOfLine(/^case +([^\n]+)/, 'case');
     if (tok) {
       this.incrementColumn(-tok.val.length);
-      this.assertExpression(tok.val);
+      tok.ast = this.assertExpression(tok.val);
       this.incrementColumn(tok.val.length);
       this.tokens.push(this.tokEnd(tok));
       return true;
@@ -880,7 +878,7 @@ Lexer.prototype = {
       }
 
       this.incrementColumn(-tok.val.length);
-      this.assertExpression(tok.val);
+      tok.ast = this.assertExpression(tok.val);
       this.incrementColumn(tok.val.length);
       this.tokens.push(this.tokEnd(tok));
       return true;
@@ -913,7 +911,7 @@ Lexer.prototype = {
    */
 
   call: function() {
-    var tok, captures, increment;
+    var tok, ast, captures, increment;
     if ((captures = /^\+(\s*)(([-\w]+)|(#\{))/.exec(this.input))) {
       // try to consume simple or interpolated call
       if (captures[3]) {
@@ -926,8 +924,8 @@ Lexer.prototype = {
         var match = this.bracketExpression(2 + captures[1].length);
         increment = match.end + 1;
         this.consume(increment);
-        this.assertExpression(match.src);
-        tok = this.tok('call', '#{' + match.src + '}');
+        ast = this.assertExpression(match.src);
+        tok = this.tok('call', '#{' + match.src + '}', ast);
       }
 
       this.incrementColumn(increment);
@@ -941,7 +939,7 @@ Lexer.prototype = {
           this.incrementColumn(1);
           this.consume(range.end + 1);
           tok.args = range.src;
-          this.assertExpression('[' + tok.args + ']');
+          tok.ast_args = this.assertExpression('[' + tok.args + ']').elements;
           for (var i = 0; i <= tok.args.length; i++) {
             if (tok.args[i] === '\n') {
               this.incrementLine(1);
@@ -989,11 +987,11 @@ Lexer.prototype = {
       switch (type) {
         case 'if':
         case 'else-if':
-          this.assertExpression(js);
+          tok.ast = this.assertExpression(js);
           break;
         case 'unless':
-          this.assertExpression(js);
           tok.val = '!(' + js + ')';
+          tok.ast = this.assertExpression(tok.val);
           tok.type = 'if';
           break;
         case 'else':
@@ -1016,11 +1014,11 @@ Lexer.prototype = {
    */
 
   while: function() {
-    var captures, tok;
+    var captures, ast, tok;
     if ((captures = /^while +([^\n]+)/.exec(this.input))) {
       this.consume(captures[0].length);
-      this.assertExpression(captures[1]);
-      tok = this.tok('while', captures[1]);
+      ast = this.assertExpression(captures[1]);
+      tok = this.tok('while', captures[1], ast);
       this.incrementColumn(captures[0].length);
       this.tokens.push(this.tokEnd(tok));
       return true;
@@ -1045,7 +1043,7 @@ Lexer.prototype = {
       var tok = this.tok('each', captures[1]);
       tok.key = captures[2] || null;
       this.incrementColumn(captures[0].length - captures[3].length);
-      this.assertExpression(captures[3]);
+      tok.ast = this.assertExpression(captures[3]);
       tok.code = captures[3];
       this.incrementColumn(captures[3].length);
       this.tokens.push(this.tokEnd(tok));
@@ -1172,7 +1170,7 @@ Lexer.prototype = {
       // ----               captures[0] - captures[2]
       //     ^              after colno
       this.incrementColumn(captures[0].length - captures[2].length);
-      if (tok.buffer) this.assertExpression(code);
+      if (tok.buffer) tok.ast = this.assertExpression(code);
       this.tokens.push(tok);
 
       // p #[!=    abc] hey
@@ -1271,6 +1269,7 @@ Lexer.prototype = {
 
     if (valueResponse.val) {
       tok.val = valueResponse.val;
+      tok.ast = valueResponse.ast;
       tok.mustEscape = valueResponse.mustEscape;
     } else {
       // was a boolean attribute (ex: `input(disabled)`)
@@ -1312,6 +1311,7 @@ Lexer.prototype = {
     var state = characterParser.defaultState();
     var col = this.colno;
     var line = this.lineno;
+    var ast;
 
     // consume all whitespace before the equals sign
     for (i = 0; i < str.length; i++) {
@@ -1420,12 +1420,17 @@ Lexer.prototype = {
       }
     }
 
-    this.assertExpression(val);
+    ast = this.assertExpression(val);
 
     this.lineno = line;
     this.colno = col;
 
-    return {val: val, mustEscape: escapeAttr, remainingSource: str.substr(i)};
+    return {
+      val: val,
+      ast: ast,
+      mustEscape: escapeAttr,
+      remainingSource: str.substr(i),
+    };
   },
 
   /**
diff --git a/packages/pug-lexer/package.json b/packages/pug-lexer/package.json
index 42b120792..5029d0643 100644
--- a/packages/pug-lexer/package.json
+++ b/packages/pug-lexer/package.json
@@ -6,13 +6,11 @@
     "pug"
   ],
   "dependencies": {
+    "@babel/parser": "^7.10.2",
     "character-parser": "^2.2.0",
-    "is-expression": "^4.0.0",
     "pug-error": "^1.3.3"
   },
   "devDependencies": {
-    "acorn": "^7.1.1",
-    "acorn-walk": "^7.1.1"
   },
   "files": [
     "index.js",
diff --git a/packages/pug-lexer/test/__snapshots__/index.test.js.snap b/packages/pug-lexer/test/__snapshots__/index.test.js.snap
index caea3836a..0fb474613 100644
--- a/packages/pug-lexer/test/__snapshots__/index.test.js.snap
+++ b/packages/pug-lexer/test/__snapshots__/index.test.js.snap
@@ -78,6 +78,84 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 66,
+      "errors": Array [],
+      "expressions": Array [
+        Object {
+          "end": 63,
+          "loc": Object {
+            "end": Object {
+              "column": 63,
+              "line": 1,
+            },
+            "identifierName": "avatar",
+            "start": Object {
+              "column": 57,
+              "line": 1,
+            },
+          },
+          "name": "avatar",
+          "start": 57,
+          "type": "Identifier",
+        },
+      ],
+      "loc": Object {
+        "end": Object {
+          "column": 66,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "quasis": Array [
+        Object {
+          "end": 55,
+          "loc": Object {
+            "end": Object {
+              "column": 55,
+              "line": 1,
+            },
+            "start": Object {
+              "column": 1,
+              "line": 1,
+            },
+          },
+          "start": 1,
+          "tail": false,
+          "type": "TemplateElement",
+          "value": Object {
+            "cooked": "background-image: url(https://www.gravatar.com/avatar/",
+            "raw": "background-image: url(https://www.gravatar.com/avatar/",
+          },
+        },
+        Object {
+          "end": 65,
+          "loc": Object {
+            "end": Object {
+              "column": 65,
+              "line": 1,
+            },
+            "start": Object {
+              "column": 64,
+              "line": 1,
+            },
+          },
+          "start": 64,
+          "tail": true,
+          "type": "TemplateElement",
+          "value": Object {
+            "cooked": ")",
+            "raw": ")",
+          },
+        },
+      ],
+      "start": 0,
+      "type": "TemplateLiteral",
+    },
     "loc": Object {
       "end": Object {
         "column": 88,
@@ -245,6 +323,61 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 13,
+      "errors": Array [],
+      "left": Object {
+        "end": 8,
+        "extra": Object {
+          "raw": "'/user/'",
+          "rawValue": "/user/",
+        },
+        "loc": Object {
+          "end": Object {
+            "column": 8,
+            "line": 1,
+          },
+          "start": Object {
+            "column": 0,
+            "line": 1,
+          },
+        },
+        "start": 0,
+        "type": "StringLiteral",
+        "value": "/user/",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 13,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "operator": "+",
+      "right": Object {
+        "end": 13,
+        "loc": Object {
+          "end": Object {
+            "column": 13,
+            "line": 1,
+          },
+          "identifierName": "id",
+          "start": Object {
+            "column": 11,
+            "line": 1,
+          },
+        },
+        "name": "id",
+        "start": 11,
+        "type": "Identifier",
+      },
+      "start": 0,
+      "type": "BinaryExpression",
+    },
     "loc": Object {
       "end": Object {
         "column": 21,
@@ -262,6 +395,28 @@ Array [
     "val": "'/user/' + id",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 8,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "'button'",
+        "rawValue": "button",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 8,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "button",
+    },
     "loc": Object {
       "end": Object {
         "column": 37,
@@ -336,6 +491,61 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 13,
+      "errors": Array [],
+      "left": Object {
+        "end": 8,
+        "extra": Object {
+          "raw": "'/user/'",
+          "rawValue": "/user/",
+        },
+        "loc": Object {
+          "end": Object {
+            "column": 8,
+            "line": 1,
+          },
+          "start": Object {
+            "column": 0,
+            "line": 1,
+          },
+        },
+        "start": 0,
+        "type": "StringLiteral",
+        "value": "/user/",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 13,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "operator": "+",
+      "right": Object {
+        "end": 13,
+        "loc": Object {
+          "end": Object {
+            "column": 13,
+            "line": 1,
+          },
+          "identifierName": "id",
+          "start": Object {
+            "column": 11,
+            "line": 1,
+          },
+        },
+        "name": "id",
+        "start": 11,
+        "type": "Identifier",
+      },
+      "start": 0,
+      "type": "BinaryExpression",
+    },
     "loc": Object {
       "end": Object {
         "column": 25,
@@ -353,6 +563,28 @@ Array [
     "val": "'/user/' + id",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 8,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "'button'",
+        "rawValue": "button",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 8,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "button",
+    },
     "loc": Object {
       "end": Object {
         "column": 45,
@@ -427,6 +659,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 8,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "'answer'",
+        "rawValue": "answer",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 8,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "answer",
+    },
     "loc": Object {
       "end": Object {
         "column": 18,
@@ -444,6 +698,41 @@ Array [
     "val": "'answer'",
   },
   Object {
+    "ast": Object {
+      "arguments": Array [],
+      "callee": Object {
+        "end": 6,
+        "loc": Object {
+          "end": Object {
+            "column": 6,
+            "line": 1,
+          },
+          "identifierName": "answer",
+          "start": Object {
+            "column": 0,
+            "line": 1,
+          },
+        },
+        "name": "answer",
+        "start": 0,
+        "type": "Identifier",
+      },
+      "comments": Array [],
+      "end": 8,
+      "errors": Array [],
+      "loc": Object {
+        "end": Object {
+          "column": 8,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "CallExpression",
+    },
     "loc": Object {
       "end": Object {
         "column": 34,
@@ -518,6 +807,65 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "elements": Array [
+        Object {
+          "end": 9,
+          "extra": Object {
+            "raw": "'class1'",
+            "rawValue": "class1",
+          },
+          "loc": Object {
+            "end": Object {
+              "column": 9,
+              "line": 1,
+            },
+            "start": Object {
+              "column": 1,
+              "line": 1,
+            },
+          },
+          "start": 1,
+          "type": "StringLiteral",
+          "value": "class1",
+        },
+        Object {
+          "end": 19,
+          "extra": Object {
+            "raw": "'class2'",
+            "rawValue": "class2",
+          },
+          "loc": Object {
+            "end": Object {
+              "column": 19,
+              "line": 1,
+            },
+            "start": Object {
+              "column": 11,
+              "line": 1,
+            },
+          },
+          "start": 11,
+          "type": "StringLiteral",
+          "value": "class2",
+        },
+      ],
+      "end": 20,
+      "errors": Array [],
+      "loc": Object {
+        "end": Object {
+          "column": 20,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "ArrayExpression",
+    },
     "loc": Object {
       "end": Object {
         "column": 31,
@@ -607,6 +955,65 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "elements": Array [
+        Object {
+          "end": 9,
+          "extra": Object {
+            "raw": "'class1'",
+            "rawValue": "class1",
+          },
+          "loc": Object {
+            "end": Object {
+              "column": 9,
+              "line": 1,
+            },
+            "start": Object {
+              "column": 1,
+              "line": 1,
+            },
+          },
+          "start": 1,
+          "type": "StringLiteral",
+          "value": "class1",
+        },
+        Object {
+          "end": 19,
+          "extra": Object {
+            "raw": "'class2'",
+            "rawValue": "class2",
+          },
+          "loc": Object {
+            "end": Object {
+              "column": 19,
+              "line": 1,
+            },
+            "start": Object {
+              "column": 11,
+              "line": 1,
+            },
+          },
+          "start": 11,
+          "type": "StringLiteral",
+          "value": "class2",
+        },
+      ],
+      "end": 20,
+      "errors": Array [],
+      "loc": Object {
+        "end": Object {
+          "column": 20,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "ArrayExpression",
+    },
     "loc": Object {
       "end": Object {
         "column": 41,
@@ -681,6 +1088,61 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 13,
+      "errors": Array [],
+      "left": Object {
+        "end": 8,
+        "extra": Object {
+          "raw": "'/user/'",
+          "rawValue": "/user/",
+        },
+        "loc": Object {
+          "end": Object {
+            "column": 8,
+            "line": 1,
+          },
+          "start": Object {
+            "column": 0,
+            "line": 1,
+          },
+        },
+        "start": 0,
+        "type": "StringLiteral",
+        "value": "/user/",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 13,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "operator": "+",
+      "right": Object {
+        "end": 13,
+        "loc": Object {
+          "end": Object {
+            "column": 13,
+            "line": 1,
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@@ -698,6 +1160,28 @@ Array [
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@@ -772,6 +1256,61 @@ Array [
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+      "errors": Array [],
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@@ -789,6 +1328,28 @@ Array [
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+      "errors": Array [],
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@@ -863,6 +1424,28 @@ Array [
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@@ -880,6 +1463,41 @@ Array [
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@@ -954,6 +1572,65 @@ Array [
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@@ -1043,6 +1720,65 @@ Array [
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@@ -1117,6 +1853,25 @@ Array [
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@@ -1237,6 +1992,23 @@ Array [
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@@ -1254,6 +2026,25 @@ Array [
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@@ -1434,6 +2225,28 @@ Array [
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@@ -1508,6 +2321,28 @@ Array [
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@@ -1599,6 +2434,28 @@ Array [
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@@ -1633,6 +2490,28 @@ Array [
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@@ -1726,6 +2605,28 @@ Array [
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@@ -1815,6 +2716,28 @@ Array [
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@@ -2027,6 +2950,28 @@ Array [
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@@ -2044,6 +2989,28 @@ Array [
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@@ -2118,6 +3085,28 @@ Array [
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@@ -2135,6 +3124,85 @@ Array [
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@@ -2239,6 +3307,28 @@ Array [
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@@ -2362,6 +3452,28 @@ Array [
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@@ -2451,6 +3563,28 @@ Array [
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@@ -2525,6 +3659,28 @@ Array [
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@@ -2599,6 +3755,28 @@ Array [
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@@ -2688,6 +3866,28 @@ Array [
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@@ -2900,6 +4100,28 @@ Array [
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@@ -2917,6 +4139,28 @@ Array [
     "val": "'foo, bar, baz'",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 1,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "1",
+        "rawValue": 1,
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 1,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "NumericLiteral",
+      "value": 1,
+    },
     "loc": Object {
       "end": Object {
         "column": 28,
@@ -2991,6 +4235,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 9,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "'((foo))'",
+        "rawValue": "((foo))",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 9,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "((foo))",
+    },
     "loc": Object {
       "end": Object {
         "column": 16,
@@ -3008,6 +4274,85 @@ Array [
     "val": "'((foo))'",
   },
   Object {
+    "ast": Object {
+      "alternate": Object {
+        "end": 11,
+        "extra": Object {
+          "raw": "0",
+          "rawValue": 0,
+        },
+        "loc": Object {
+          "end": Object {
+            "column": 11,
+            "line": 1,
+          },
+          "start": Object {
+            "column": 10,
+            "line": 1,
+          },
+        },
+        "start": 10,
+        "type": "NumericLiteral",
+        "value": 0,
+      },
+      "comments": Array [],
+      "consequent": Object {
+        "end": 7,
+        "extra": Object {
+          "raw": "1",
+          "rawValue": 1,
+        },
+        "loc": Object {
+          "end": Object {
+            "column": 7,
+            "line": 1,
+          },
+          "start": Object {
+            "column": 6,
+            "line": 1,
+          },
+        },
+        "start": 6,
+        "type": "NumericLiteral",
+        "value": 1,
+      },
+      "end": 11,
+      "errors": Array [],
+      "loc": Object {
+        "end": Object {
+          "column": 11,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "test": Object {
+        "end": 2,
+        "extra": Object {
+          "parenStart": 0,
+          "parenthesized": true,
+          "raw": "1",
+          "rawValue": 1,
+        },
+        "loc": Object {
+          "end": Object {
+            "column": 2,
+            "line": 1,
+          },
+          "start": Object {
+            "column": 1,
+            "line": 1,
+          },
+        },
+        "start": 1,
+        "type": "NumericLiteral",
+        "value": 1,
+      },
+      "type": "ConditionalExpression",
+    },
     "loc": Object {
       "end": Object {
         "column": 33,
@@ -3112,6 +4457,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 5,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "'foo'",
+        "rawValue": "foo",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 5,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "foo",
+    },
     "loc": Object {
       "end": Object {
         "column": 21,
@@ -3235,6 +4602,28 @@ Array [
     "val": true,
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 5,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "'bar'",
+        "rawValue": "bar",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 5,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "bar",
+    },
     "loc": Object {
       "end": Object {
         "column": 30,
@@ -3324,6 +4713,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 8,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "\\"class:\\"",
+        "rawValue": "class:",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 8,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "class:",
+    },
     "loc": Object {
       "end": Object {
         "column": 15,
@@ -3398,6 +4809,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 6,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "'\\\\\\\\S+'",
+        "rawValue": "\\\\S+",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 6,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "\\\\S+",
+    },
     "loc": Object {
       "end": Object {
         "column": 21,
@@ -3472,6 +4905,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 6,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "\\"true\\"",
+        "rawValue": "true",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 6,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "true",
+    },
     "loc": Object {
       "end": Object {
         "column": 17,
@@ -3546,6 +5001,62 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "arguments": Array [
+        Object {
+          "end": 10,
+          "extra": Object {
+            "raw": "0",
+            "rawValue": 0,
+          },
+          "loc": Object {
+            "end": Object {
+              "column": 10,
+              "line": 1,
+            },
+            "start": Object {
+              "column": 9,
+              "line": 1,
+            },
+          },
+          "start": 9,
+          "type": "NumericLiteral",
+          "value": 0,
+        },
+      ],
+      "callee": Object {
+        "end": 8,
+        "loc": Object {
+          "end": Object {
+            "column": 8,
+            "line": 1,
+          },
+          "identifierName": "Date",
+          "start": Object {
+            "column": 4,
+            "line": 1,
+          },
+        },
+        "name": "Date",
+        "start": 4,
+        "type": "Identifier",
+      },
+      "comments": Array [],
+      "end": 11,
+      "errors": Array [],
+      "loc": Object {
+        "end": Object {
+          "column": 11,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "NewExpression",
+    },
     "loc": Object {
       "end": Object {
         "column": 21,
@@ -4241,6 +5752,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 5,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "'foo'",
+        "rawValue": "foo",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 5,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "foo",
+    },
     "loc": Object {
       "end": Object {
         "column": 12,
@@ -4258,6 +5791,28 @@ Array [
     "val": "'foo'",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 5,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "\\"bar\\"",
+        "rawValue": "bar",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 5,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "bar",
+    },
     "loc": Object {
       "end": Object {
         "column": 24,
@@ -4332,6 +5887,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 5,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "'foo'",
+        "rawValue": "foo",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 5,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "foo",
+    },
     "loc": Object {
       "end": Object {
         "column": 12,
@@ -4349,6 +5926,28 @@ Array [
     "val": "'foo'",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 5,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "'bar'",
+        "rawValue": "bar",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 5,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "bar",
+    },
     "loc": Object {
       "end": Object {
         "column": 24,
@@ -4442,6 +6041,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 17,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "'text/x-template'",
+        "rawValue": "text/x-template",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 17,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "text/x-template",
+    },
     "loc": Object {
       "end": Object {
         "column": 30,
@@ -4517,6 +6138,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 21,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "'user-<%= user.id %>'",
+        "rawValue": "user-<%= user.id %>",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 21,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "user-<%= user.id %>",
+    },
     "loc": Object {
       "end": Object {
         "column": 32,
@@ -4700,6 +6343,25 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 4,
+      "errors": Array [],
+      "loc": Object {
+        "end": Object {
+          "column": 4,
+          "line": 1,
+        },
+        "identifierName": "user",
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "name": "user",
+      "start": 0,
+      "type": "Identifier",
+    },
     "loc": Object {
       "end": Object {
         "column": 19,
@@ -4774,6 +6436,85 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "elements": Array [
+        Object {
+          "end": 2,
+          "extra": Object {
+            "raw": "1",
+            "rawValue": 1,
+          },
+          "loc": Object {
+            "end": Object {
+              "column": 2,
+              "line": 1,
+            },
+            "start": Object {
+              "column": 1,
+              "line": 1,
+            },
+          },
+          "start": 1,
+          "type": "NumericLiteral",
+          "value": 1,
+        },
+        Object {
+          "end": 4,
+          "extra": Object {
+            "raw": "2",
+            "rawValue": 2,
+          },
+          "loc": Object {
+            "end": Object {
+              "column": 4,
+              "line": 1,
+            },
+            "start": Object {
+              "column": 3,
+              "line": 1,
+            },
+          },
+          "start": 3,
+          "type": "NumericLiteral",
+          "value": 2,
+        },
+        Object {
+          "end": 6,
+          "extra": Object {
+            "raw": "3",
+            "rawValue": 3,
+          },
+          "loc": Object {
+            "end": Object {
+              "column": 6,
+              "line": 1,
+            },
+            "start": Object {
+              "column": 5,
+              "line": 1,
+            },
+          },
+          "start": 5,
+          "type": "NumericLiteral",
+          "value": 3,
+        },
+      ],
+      "end": 7,
+      "errors": Array [],
+      "loc": Object {
+        "end": Object {
+          "column": 7,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "ArrayExpression",
+    },
     "loc": Object {
       "end": Object {
         "column": 23,
@@ -4848,6 +6589,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 6,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "'tobi'",
+        "rawValue": "tobi",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 6,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "tobi",
+    },
     "loc": Object {
       "end": Object {
         "column": 25,
@@ -4922,6 +6685,80 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 24,
+      "errors": Array [],
+      "loc": Object {
+        "end": Object {
+          "column": 24,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "properties": Array [
+        Object {
+          "computed": false,
+          "end": 23,
+          "key": Object {
+            "end": 8,
+            "loc": Object {
+              "end": Object {
+                "column": 8,
+                "line": 1,
+              },
+              "identifierName": "message",
+              "start": Object {
+                "column": 1,
+                "line": 1,
+              },
+            },
+            "name": "message",
+            "start": 1,
+            "type": "Identifier",
+          },
+          "loc": Object {
+            "end": Object {
+              "column": 23,
+              "line": 1,
+            },
+            "start": Object {
+              "column": 1,
+              "line": 1,
+            },
+          },
+          "method": false,
+          "shorthand": false,
+          "start": 1,
+          "type": "ObjectProperty",
+          "value": Object {
+            "end": 23,
+            "extra": Object {
+              "raw": "\\"Let's rock!\\"",
+              "rawValue": "Let's rock!",
+            },
+            "loc": Object {
+              "end": Object {
+                "column": 23,
+                "line": 1,
+              },
+              "start": Object {
+                "column": 10,
+                "line": 1,
+              },
+            },
+            "start": 10,
+            "type": "StringLiteral",
+            "value": "Let's rock!",
+          },
+        },
+      ],
+      "start": 0,
+      "type": "ObjectExpression",
+    },
     "loc": Object {
       "end": Object {
         "column": 42,
@@ -4996,6 +6833,80 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 40,
+      "errors": Array [],
+      "loc": Object {
+        "end": Object {
+          "column": 40,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "properties": Array [
+        Object {
+          "computed": false,
+          "end": 39,
+          "key": Object {
+            "end": 8,
+            "loc": Object {
+              "end": Object {
+                "column": 8,
+                "line": 1,
+              },
+              "identifierName": "message",
+              "start": Object {
+                "column": 1,
+                "line": 1,
+              },
+            },
+            "name": "message",
+            "start": 1,
+            "type": "Identifier",
+          },
+          "loc": Object {
+            "end": Object {
+              "column": 39,
+              "line": 1,
+            },
+            "start": Object {
+              "column": 1,
+              "line": 1,
+            },
+          },
+          "method": false,
+          "shorthand": false,
+          "start": 1,
+          "type": "ObjectProperty",
+          "value": Object {
+            "end": 39,
+            "extra": Object {
+              "raw": "\\"a quote: &quot; this & that\\"",
+              "rawValue": "a quote: &quot; this & that",
+            },
+            "loc": Object {
+              "end": Object {
+                "column": 39,
+                "line": 1,
+              },
+              "start": Object {
+                "column": 10,
+                "line": 1,
+              },
+            },
+            "start": 10,
+            "type": "StringLiteral",
+            "value": "a quote: &quot; this & that",
+          },
+        },
+      ],
+      "start": 0,
+      "type": "ObjectExpression",
+    },
     "loc": Object {
       "end": Object {
         "column": 60,
@@ -5070,6 +6981,62 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "arguments": Array [
+        Object {
+          "end": 10,
+          "extra": Object {
+            "raw": "0",
+            "rawValue": 0,
+          },
+          "loc": Object {
+            "end": Object {
+              "column": 10,
+              "line": 1,
+            },
+            "start": Object {
+              "column": 9,
+              "line": 1,
+            },
+          },
+          "start": 9,
+          "type": "NumericLiteral",
+          "value": 0,
+        },
+      ],
+      "callee": Object {
+        "end": 8,
+        "loc": Object {
+          "end": Object {
+            "column": 8,
+            "line": 1,
+          },
+          "identifierName": "Date",
+          "start": Object {
+            "column": 4,
+            "line": 1,
+          },
+        },
+        "name": "Date",
+        "start": 4,
+        "type": "Identifier",
+      },
+      "comments": Array [],
+      "end": 11,
+      "errors": Array [],
+      "loc": Object {
+        "end": Object {
+          "column": 11,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "NewExpression",
+    },
     "loc": Object {
       "end": Object {
         "column": 26,
@@ -5624,6 +7591,25 @@ Array [
     "type": "newline",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 4,
+      "errors": Array [],
+      "loc": Object {
+        "end": Object {
+          "column": 4,
+          "line": 1,
+        },
+        "identifierName": "list",
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "name": "list",
+      "start": 0,
+      "type": "Identifier",
+    },
     "code": "list",
     "key": null,
     "loc": Object {
@@ -5829,6 +7815,25 @@ Array [
     "val": "li",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 6,
+      "errors": Array [],
+      "loc": Object {
+        "end": Object {
+          "column": 6,
+          "line": 1,
+        },
+        "identifierName": "string",
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "name": "string",
+      "start": 0,
+      "type": "Identifier",
+    },
     "buffer": true,
     "loc": Object {
       "end": Object {
@@ -5967,6 +7972,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 3,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "'#'",
+        "rawValue": "#",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 3,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
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+      "type": "Identifier",
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     "key": null,
     "loc": Object {
@@ -14295,6 +17871,58 @@ Array [
     "val": "li",
   },
   Object {
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+      "computed": false,
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+      "errors": Array [],
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+            "line": 1,
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+        "loc": Object {
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+          },
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     "buffer": true,
     "loc": Object {
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@@ -14445,6 +18073,25 @@ Array [
     "type": "newline",
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+      "errors": Array [],
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+          "line": 1,
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+      "name": "users",
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+      "type": "Identifier",
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     "loc": Object {
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@@ -14505,6 +18152,25 @@ Array [
     "val": 4,
   },
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+    "ast": Object {
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+      "errors": Array [],
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+          "line": 1,
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+          "line": 1,
+        },
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+      "name": "users",
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+      "type": "Identifier",
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     "code": "users",
     "key": null,
     "loc": Object {
@@ -14552,6 +18218,58 @@ Array [
     "val": "li",
   },
   Object {
+    "ast": Object {
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+      "computed": false,
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+      "errors": Array [],
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+            "line": 1,
+          },
+        },
+        "name": "user",
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+        "type": "Identifier",
+      },
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+        "loc": Object {
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+            "line": 1,
+          },
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+            "line": 1,
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+      "type": "MemberExpression",
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     "buffer": true,
     "loc": Object {
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@@ -14746,6 +18464,25 @@ Array [
     "val": 2,
   },
   Object {
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+      "errors": Array [],
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+          "line": 1,
+        },
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+      "name": "user",
+      "start": 0,
+      "type": "Identifier",
+    },
     "code": "user",
     "key": "key",
     "loc": Object {
@@ -14793,6 +18530,25 @@ Array [
     "val": "li",
   },
   Object {
+    "ast": Object {
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+      "end": 3,
+      "errors": Array [],
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+          "line": 1,
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+      "name": "key",
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+      "type": "Identifier",
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     "buffer": true,
     "loc": Object {
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@@ -14825,6 +18581,25 @@ Array [
     "val": ": ",
   },
   Object {
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+      "errors": Array [],
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+      "type": "Identifier",
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     "buffer": true,
     "loc": Object {
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@@ -15005,6 +18780,25 @@ Array [
     "val": 2,
   },
   Object {
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+      "errors": Array [],
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+          "line": 1,
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+          "line": 1,
+        },
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+      "name": "user",
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+      "type": "Identifier",
+    },
     "code": "user",
     "key": "key",
     "loc": Object {
@@ -15052,6 +18846,25 @@ Array [
     "val": "li",
   },
   Object {
+    "ast": Object {
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+      "end": 3,
+      "errors": Array [],
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+        "identifierName": "key",
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+          "line": 1,
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+      "name": "key",
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+      "type": "Identifier",
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     "buffer": true,
     "loc": Object {
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@@ -15084,6 +18897,25 @@ Array [
     "val": ": ",
   },
   Object {
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+      "errors": Array [],
+      "loc": Object {
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+      "type": "Identifier",
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     "buffer": true,
     "loc": Object {
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@@ -15295,6 +19127,25 @@ Array [
     "val": 2,
   },
   Object {
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+      "errors": Array [],
+      "loc": Object {
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+          "line": 1,
+        },
+        "identifierName": "user",
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+          "line": 1,
+        },
+      },
+      "name": "user",
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+      "type": "Identifier",
+    },
     "code": "user",
     "key": "key",
     "loc": Object {
@@ -15342,6 +19193,25 @@ Array [
     "val": "li",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 3,
+      "errors": Array [],
+      "loc": Object {
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+        "identifierName": "key",
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+          "line": 1,
+        },
+      },
+      "name": "key",
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+      "type": "Identifier",
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     "buffer": true,
     "loc": Object {
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@@ -15374,6 +19244,25 @@ Array [
     "val": ": ",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 3,
+      "errors": Array [],
+      "loc": Object {
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+          "line": 1,
+        },
+      },
+      "name": "val",
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+      "type": "Identifier",
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     "buffer": true,
     "loc": Object {
       "end": Object {
@@ -15836,6 +19725,25 @@ Array [
     "type": "newline",
   },
   Object {
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+      "end": 3,
+      "errors": Array [],
+      "loc": Object {
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+          "line": 1,
+        },
+        "identifierName": "txt",
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "name": "txt",
+      "start": 0,
+      "type": "Identifier",
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     "buffer": true,
     "loc": Object {
       "end": Object {
@@ -15943,6 +19851,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 12,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "\\"<%= bar %>\\"",
+        "rawValue": "<%= bar %>",
+      },
+      "loc": Object {
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+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "<%= bar %>",
+    },
     "loc": Object {
       "end": Object {
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@@ -16017,6 +19947,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 12,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "\\"<%= bar %>\\"",
+        "rawValue": "<%= bar %>",
+      },
+      "loc": Object {
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+          "line": 1,
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+        "start": Object {
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+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "<%= bar %>",
+    },
     "loc": Object {
       "end": Object {
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@@ -16091,6 +20043,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 12,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "\\"<%= bar %>\\"",
+        "rawValue": "<%= bar %>",
+      },
+      "loc": Object {
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+        "start": Object {
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+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "<%= bar %>",
+    },
     "loc": Object {
       "end": Object {
         "column": 23,
@@ -16165,6 +20139,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 12,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "\\"<%= bar %>\\"",
+        "rawValue": "<%= bar %>",
+      },
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+        "start": Object {
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+        },
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+      "start": 0,
+      "type": "StringLiteral",
+      "value": "<%= bar %>",
+    },
     "loc": Object {
       "end": Object {
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@@ -16239,6 +20235,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
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+      "end": 21,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "\\"<%= bar %> lol rofl\\"",
+        "rawValue": "<%= bar %> lol rofl",
+      },
+      "loc": Object {
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+          "line": 1,
+        },
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+        },
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+      "start": 0,
+      "type": "StringLiteral",
+      "value": "<%= bar %> lol rofl",
+    },
     "loc": Object {
       "end": Object {
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@@ -16313,6 +20331,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
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+      "end": 33,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "\\"<%= bar %> lol rofl <%= lmao %>\\"",
+        "rawValue": "<%= bar %> lol rofl <%= lmao %>",
+      },
+      "loc": Object {
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+          "line": 1,
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+        },
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+      "start": 0,
+      "type": "StringLiteral",
+      "value": "<%= bar %> lol rofl <%= lmao %>",
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     "loc": Object {
       "end": Object {
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@@ -16477,6 +20517,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
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+      "end": 17,
+      "errors": Array [],
+      "extra": Object {
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+        "rawValue": "text/javascript",
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+          "line": 1,
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+        },
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+      "start": 0,
+      "type": "StringLiteral",
+      "value": "text/javascript",
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     "loc": Object {
       "end": Object {
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@@ -16624,6 +20686,24 @@ Array [
     "type": "start-attributes",
   },
   Object {
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+      "errors": Array [],
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+      "type": "BooleanLiteral",
+      "value": true,
+    },
     "loc": Object {
       "end": Object {
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@@ -16849,6 +20929,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
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+      "end": 5,
+      "errors": Array [],
+      "extra": Object {
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     "loc": Object {
       "end": Object {
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@@ -16866,6 +20968,28 @@ Array [
     "val": "'val'",
   },
   Object {
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+      "errors": Array [],
+      "extra": Object {
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     "loc": Object {
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@@ -17207,6 +21331,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
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+      "end": 5,
+      "errors": Array [],
+      "extra": Object {
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     "loc": Object {
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@@ -17224,6 +21370,28 @@ Array [
     "val": "'val'",
   },
   Object {
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+      "end": 1,
+      "errors": Array [],
+      "extra": Object {
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+      "loc": Object {
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+    },
     "loc": Object {
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@@ -17522,6 +21690,24 @@ Array [
     "type": "start-attributes",
   },
   Object {
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+      "errors": Array [],
+      "loc": Object {
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+      "type": "BooleanLiteral",
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     "loc": Object {
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@@ -17670,6 +21856,24 @@ Array [
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+      "errors": Array [],
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@@ -17988,6 +22192,28 @@ Array [
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   Object {
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+      "errors": Array [],
+      "extra": Object {
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+        "rawValue": "text/css",
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+      "value": "text/css",
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     "loc": Object {
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@@ -18907,6 +23133,28 @@ Array [
     "type": "start-attributes",
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   Object {
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+      "end": 10,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "\\"text/css\\"",
+        "rawValue": "text/css",
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+      "type": "StringLiteral",
+      "value": "text/css",
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     "loc": Object {
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@@ -19371,6 +23619,25 @@ Array [
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+      "errors": Array [],
+      "loc": Object {
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+      "name": "users",
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+      "type": "Identifier",
+    },
     "code": "users",
     "key": null,
     "loc": Object {
@@ -19432,6 +23699,58 @@ Array [
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   },
   Object {
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+      "errors": Array [],
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@@ -30334,6 +36140,28 @@ Array [
     "val": "'foo'",
   },
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+      "end": 5,
+      "errors": Array [],
+      "extra": Object {
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+      "type": "StringLiteral",
+      "value": "bar",
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@@ -30486,6 +36314,28 @@ Array [
     "type": "start-attributes",
   },
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+      "end": 5,
+      "errors": Array [],
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+        "rawValue": "baz",
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@@ -30503,6 +36353,25 @@ Array [
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   },
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+      "errors": Array [],
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@@ -30520,6 +36389,25 @@ Array [
     "val": "val",
   },
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+      "errors": Array [],
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@@ -30537,6 +36425,25 @@ Array [
     "val": "val",
   },
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@@ -30688,6 +36595,25 @@ Array [
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+      "errors": Array [],
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     "buffer": true,
     "loc": Object {
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@@ -30720,6 +36646,28 @@ Array [
   },
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+        "extra": Object {
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@@ -30749,6 +36697,28 @@ Array [
     "type": "start-attributes",
   },
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+      "errors": Array [],
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     "loc": Object {
       "end": Object {
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@@ -30766,6 +36736,28 @@ Array [
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   },
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+      "errors": Array [],
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@@ -30857,6 +36849,25 @@ Array [
     "val": "p",
   },
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     "buffer": true,
     "loc": Object {
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@@ -30903,6 +36914,25 @@ Array [
     "val": "p",
   },
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+      "errors": Array [],
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     "loc": Object {
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@@ -30949,6 +36979,25 @@ Array [
     "val": "p",
   },
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     "loc": Object {
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@@ -30995,6 +37044,25 @@ Array [
     "val": "p",
   },
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     "buffer": true,
     "loc": Object {
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@@ -31056,6 +37124,28 @@ Array [
     "type": "start-attributes",
   },
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+      "errors": Array [],
+      "extra": Object {
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+        "rawValue": "qux",
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     "loc": Object {
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@@ -31073,6 +37163,28 @@ Array [
     "val": "\\"qux\\"",
   },
   Object {
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+      "errors": Array [],
+      "extra": Object {
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@@ -31124,6 +37236,88 @@ Array [
   '3',
       '4'
 ",
+    "ast_args": Array [
+      Object {
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+        "extra": Object {
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+        "extra": Object {
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+        "extra": Object {
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     "loc": Object {
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@@ -31277,6 +37471,25 @@ Array [
     "val": "h1",
   },
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+      "loc": Object {
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     "buffer": true,
     "loc": Object {
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@@ -31411,6 +37624,28 @@ Array [
   },
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+        "extra": Object {
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     "loc": Object {
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@@ -31589,6 +37824,25 @@ Array [
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   },
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     "buffer": true,
     "loc": Object {
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@@ -31767,6 +38021,28 @@ Array [
   },
   Object {
     "args": "'Something'",
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+      Object {
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+        "extra": Object {
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+          "rawValue": "Something",
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+            "line": 1,
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+            "line": 1,
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+        "type": "StringLiteral",
+        "value": "Something",
+      },
+    ],
     "loc": Object {
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@@ -32076,6 +38352,25 @@ Array [
     "type": "start-attributes",
   },
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+      "errors": Array [],
+      "loc": Object {
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       "end": Object {
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@@ -32093,6 +38388,25 @@ Array [
     "val": "method",
   },
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+      "errors": Array [],
+      "loc": Object {
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+      "name": "action",
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+      "type": "Identifier",
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     "loc": Object {
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@@ -32199,6 +38513,28 @@ Array [
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   },
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+      "errors": Array [],
+      "extra": Object {
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+      "type": "StringLiteral",
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+    },
     "loc": Object {
       "end": Object {
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@@ -32216,6 +38552,28 @@ Array [
     "val": "'hidden'",
   },
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+      "end": 7,
+      "errors": Array [],
+      "extra": Object {
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+        "rawValue": "_csrf",
+      },
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+      "start": 0,
+      "type": "StringLiteral",
+      "value": "_csrf",
+    },
     "loc": Object {
       "end": Object {
         "column": 38,
@@ -32233,6 +38591,25 @@ Array [
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   },
   Object {
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+      "errors": Array [],
+      "loc": Object {
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+          "line": 1,
+        },
+        "identifierName": "csrf_token_from_somewhere",
+        "start": Object {
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+          "line": 1,
+        },
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+      "name": "csrf_token_from_somewhere",
+      "start": 0,
+      "type": "Identifier",
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     "loc": Object {
       "end": Object {
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@@ -32381,6 +38758,48 @@ Array [
   },
   Object {
     "args": "'GET', '/search'",
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+        "extra": Object {
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+          "rawValue": "GET",
+        },
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+          },
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+        "type": "StringLiteral",
+        "value": "GET",
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+        "extra": Object {
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     "loc": Object {
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@@ -32440,6 +38859,28 @@ Array [
     "type": "start-attributes",
   },
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+      "errors": Array [],
+      "extra": Object {
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     "loc": Object {
       "end": Object {
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@@ -32457,6 +38898,28 @@ Array [
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   },
   Object {
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+      "errors": Array [],
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+      "type": "StringLiteral",
+      "value": "query",
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     "loc": Object {
       "end": Object {
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@@ -32474,6 +38937,28 @@ Array [
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   },
   Object {
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+      "end": 8,
+      "errors": Array [],
+      "extra": Object {
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+        "rawValue": "Search",
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+      "type": "StringLiteral",
+      "value": "Search",
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     "loc": Object {
       "end": Object {
         "column": 60,
@@ -32548,6 +39033,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
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+      "end": 8,
+      "errors": Array [],
+      "extra": Object {
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+      "start": 0,
+      "type": "StringLiteral",
+      "value": "submit",
+    },
     "loc": Object {
       "end": Object {
         "column": 26,
@@ -32565,6 +39072,28 @@ Array [
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   },
   Object {
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+      "end": 8,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "'Search'",
+        "rawValue": "Search",
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+      "type": "StringLiteral",
+      "value": "Search",
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     "loc": Object {
       "end": Object {
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@@ -32699,6 +39228,48 @@ Array [
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   Object {
     "args": "'POST', '/search'",
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+        "extra": Object {
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+          "rawValue": "POST",
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+            "line": 1,
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@@ -32775,6 +39368,28 @@ Array [
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@@ -32792,6 +39407,28 @@ Array [
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@@ -32866,6 +39503,28 @@ Array [
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@@ -34879,6 +41693,25 @@ Array [
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@@ -36012,6 +42967,61 @@ Array [
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@@ -36530,6 +43776,28 @@ Array [
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@@ -40598,6 +48795,25 @@ Array [
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@@ -40642,6 +48858,25 @@ Array [
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@@ -40671,6 +48906,28 @@ Array [
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@@ -40731,6 +48988,80 @@ Array [
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@@ -40881,6 +49212,58 @@ Array [
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@@ -41000,6 +49383,25 @@ Array [
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@@ -41206,6 +49608,25 @@ Array [
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@@ -41352,6 +49773,28 @@ Array [
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@@ -41426,6 +49869,28 @@ Array [
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@@ -41609,6 +50074,89 @@ Array [
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@@ -41669,6 +50217,28 @@ Array [
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@@ -41967,6 +50559,28 @@ Array [
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@@ -42099,6 +50713,28 @@ Array [
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@@ -42159,6 +50795,28 @@ Array [
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@@ -42202,6 +50860,28 @@ Array [
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@@ -42231,6 +50911,28 @@ Array [
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@@ -42290,6 +50992,28 @@ Array [
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@@ -42334,6 +51058,28 @@ Array [
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@@ -42363,6 +51109,28 @@ Array [
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@@ -42571,6 +51339,28 @@ Array [
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@@ -42664,6 +51454,28 @@ Array [
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@@ -42871,6 +51683,28 @@ Array [
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@@ -43065,6 +51899,28 @@ Array [
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@@ -44446,6 +53302,28 @@ Array [
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@@ -44463,6 +53341,28 @@ Array [
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@@ -44582,6 +53482,28 @@ Array [
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@@ -44599,6 +53521,28 @@ Array [
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@@ -44817,6 +53761,25 @@ Array [
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+      "type": "Identifier",
+    },
     "loc": Object {
       "end": Object {
         "column": 13,
@@ -44834,6 +53797,25 @@ Array [
     "val": "list",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 3,
+      "errors": Array [],
+      "loc": Object {
+        "end": Object {
+          "column": 3,
+          "line": 1,
+        },
+        "identifierName": "foo",
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "name": "foo",
+      "start": 0,
+      "type": "Identifier",
+    },
     "loc": Object {
       "end": Object {
         "column": 21,
@@ -44954,6 +53936,61 @@ Array [
     "val": 2,
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 6,
+      "errors": Array [],
+      "left": Object {
+        "end": 1,
+        "loc": Object {
+          "end": Object {
+            "column": 1,
+            "line": 1,
+          },
+          "identifierName": "x",
+          "start": Object {
+            "column": 0,
+            "line": 1,
+          },
+        },
+        "name": "x",
+        "start": 0,
+        "type": "Identifier",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 6,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "operator": "<",
+      "right": Object {
+        "end": 6,
+        "extra": Object {
+          "raw": "10",
+          "rawValue": 10,
+        },
+        "loc": Object {
+          "end": Object {
+            "column": 6,
+            "line": 1,
+          },
+          "start": Object {
+            "column": 4,
+            "line": 1,
+          },
+        },
+        "start": 4,
+        "type": "NumericLiteral",
+        "value": 10,
+      },
+      "start": 0,
+      "type": "BinaryExpression",
+    },
     "loc": Object {
       "end": Object {
         "column": 15,
@@ -45030,6 +54067,25 @@ Array [
     "val": "li",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 1,
+      "errors": Array [],
+      "loc": Object {
+        "end": Object {
+          "column": 1,
+          "line": 1,
+        },
+        "identifierName": "x",
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "name": "x",
+      "start": 0,
+      "type": "Identifier",
+    },
     "buffer": true,
     "loc": Object {
       "end": Object {
@@ -45161,6 +54217,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 11,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "'some term'",
+        "rawValue": "some term",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 11,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "some term",
+    },
     "loc": Object {
       "end": Object {
         "column": 26,
@@ -45402,6 +54480,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 13,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "'/caustic.js'",
+        "rawValue": "/caustic.js",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 13,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "/caustic.js",
+    },
     "loc": Object {
       "end": Object {
         "column": 31,
@@ -45476,6 +54576,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 9,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "'/app.js'",
+        "rawValue": "/app.js",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 9,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "/app.js",
+    },
     "loc": Object {
       "end": Object {
         "column": 27,
@@ -45701,6 +54823,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 13,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "'/caustic.js'",
+        "rawValue": "/caustic.js",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 13,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "/caustic.js",
+    },
     "loc": Object {
       "end": Object {
         "column": 31,
@@ -45775,6 +54919,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 9,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "'/app.js'",
+        "rawValue": "/app.js",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 9,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "/app.js",
+    },
     "loc": Object {
       "end": Object {
         "column": 27,
@@ -45926,6 +55092,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 12,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "'/jquery.js'",
+        "rawValue": "/jquery.js",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 12,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "/jquery.js",
+    },
     "loc": Object {
       "end": Object {
         "column": 26,
@@ -45999,6 +55187,24 @@ Array [
     "type": "newline",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 5,
+      "errors": Array [],
+      "loc": Object {
+        "end": Object {
+          "column": 5,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "BooleanLiteral",
+      "value": false,
+    },
     "loc": Object {
       "end": Object {
         "column": 11,
@@ -46058,6 +55264,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 15,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "'/jquery.ui.js'",
+        "rawValue": "/jquery.ui.js",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 15,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "/jquery.ui.js",
+    },
     "loc": Object {
       "end": Object {
         "column": 31,
@@ -46195,6 +55423,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 12,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "'/jquery.js'",
+        "rawValue": "/jquery.js",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 12,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "/jquery.js",
+    },
     "loc": Object {
       "end": Object {
         "column": 26,
@@ -46297,6 +55547,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 15,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "'/jquery.ui.js'",
+        "rawValue": "/jquery.ui.js",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 15,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "/jquery.ui.js",
+    },
     "loc": Object {
       "end": Object {
         "column": 29,
@@ -46658,6 +55930,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 12,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "'/jquery.js'",
+        "rawValue": "/jquery.js",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 12,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "/jquery.js",
+    },
     "loc": Object {
       "end": Object {
         "column": 26,
@@ -46732,6 +56026,28 @@ Array [
     "type": "start-attributes",
   },
   Object {
+    "ast": Object {
+      "comments": Array [],
+      "end": 15,
+      "errors": Array [],
+      "extra": Object {
+        "raw": "'/jquery.ui.js'",
+        "rawValue": "/jquery.ui.js",
+      },
+      "loc": Object {
+        "end": Object {
+          "column": 15,
+          "line": 1,
+        },
+        "start": Object {
+          "column": 0,
+          "line": 1,
+        },
+      },
+      "start": 0,
+      "type": "StringLiteral",
+      "value": "/jquery.ui.js",
+    },
     "loc": Object {
       "end": Object {
         "column": 29,
diff --git a/packages/pug-lexer/test/check-lexer-functions.test.js b/packages/pug-lexer/test/check-lexer-functions.test.js
index 361212884..31614427e 100644
--- a/packages/pug-lexer/test/check-lexer-functions.test.js
+++ b/packages/pug-lexer/test/check-lexer-functions.test.js
@@ -32,7 +32,7 @@ var lexerFunctions = {
   include: true,
   indent: true,
   interpolation: true,
-  isExpression: true,
+  parseExpression: true,
   mixin: true,
   mixinBlock: true,
   path: true,
diff --git a/packages/pug-parser/index.js b/packages/pug-parser/index.js
index abd531ed5..9930cdf6d 100644
--- a/packages/pug-parser/index.js
+++ b/packages/pug-parser/index.js
@@ -315,6 +315,7 @@ Parser.prototype = {
           tags.push({
             type: 'Code',
             val: tok.val,
+            astVal: tok.ast,
             buffer: tok.buffer,
             mustEscape: tok.mustEscape !== false,
             isInline: true,
@@ -430,6 +431,7 @@ Parser.prototype = {
     var node = {
       type: 'Case',
       expr: tok.val,
+      astExpr: tok.ast,
       line: tok.loc.start.line,
       column: tok.loc.start.column,
       filename: this.filename,
@@ -478,6 +480,7 @@ Parser.prototype = {
       return {
         type: 'When',
         expr: tok.val,
+        astExpr: tok.ast,
         block: this.parseBlockExpansion(),
         debug: false,
         line: tok.loc.start.line,
@@ -488,6 +491,7 @@ Parser.prototype = {
       return {
         type: 'When',
         expr: tok.val,
+        astExpr: tok.ast,
         debug: false,
         line: tok.loc.start.line,
         column: tok.loc.start.column,
@@ -526,6 +530,7 @@ Parser.prototype = {
     var node = {
       type: 'Code',
       val: tok.val,
+      astVal: tok.ast,
       buffer: tok.buffer,
       mustEscape: tok.mustEscape !== false,
       isInline: !!noBlock,
@@ -560,6 +565,7 @@ Parser.prototype = {
     var node = {
       type: 'Conditional',
       test: tok.val,
+      astTest: tok.ast,
       consequent: this.emptyBlock(tok.loc.start.line),
       alternate: null,
       line: tok.loc.start.line,
@@ -581,6 +587,7 @@ Parser.prototype = {
         currentNode = currentNode.alternate = {
           type: 'Conditional',
           test: tok.val,
+          astTest: tok.ast,
           consequent: this.emptyBlock(tok.loc.start.line),
           alternate: null,
           line: tok.loc.start.line,
@@ -608,6 +615,7 @@ Parser.prototype = {
     var node = {
       type: 'While',
       test: tok.val,
+      astTest: tok.ast,
       line: tok.loc.start.line,
       column: tok.loc.start.column,
       filename: this.filename,
@@ -782,6 +790,7 @@ Parser.prototype = {
     var node = {
       type: 'Each',
       obj: tok.code,
+      astObj: tok.ast,
       val: tok.val,
       key: tok.key,
       block: this.block(),
@@ -947,7 +956,9 @@ Parser.prototype = {
     var mixin = {
       type: 'Mixin',
       name: name,
+      astName: tok.ast,
       args: args,
+      astArgs: tok.ast_args,
       block: this.emptyBlock(tok.loc.start.line),
       call: true,
       attrs: [],
@@ -974,13 +985,13 @@ Parser.prototype = {
     var tok = this.expect('mixin');
     var name = tok.val;
     var args = tok.args;
-
     if ('indent' == this.peek().type) {
       this.inMixin++;
       var mixin = {
         type: 'Mixin',
         name: name,
         args: args,
+        astArgs: tok.ast_args,
         block: this.block(),
         call: false,
         line: tok.loc.start.line,
@@ -1091,6 +1102,7 @@ Parser.prototype = {
     var tag = {
       type: 'InterpolatedTag',
       expr: tok.val,
+      astExpr: tok.ast,
       selfClosing: false,
       block: this.emptyBlock(tok.loc.start.line),
       attrs: [],
diff --git a/packages/pug/test/__snapshots__/pug.test.js.snap b/packages/pug/test/__snapshots__/pug.test.js.snap
index dd3ef1968..d73da3af6 100644
--- a/packages/pug/test/__snapshots__/pug.test.js.snap
+++ b/packages/pug/test/__snapshots__/pug.test.js.snap
@@ -10,12 +10,12 @@ function template(locals) {
   try {
     var self = locals || {};
     pug_debug_line = 1;
-    pug_html = pug_html + '\\\\u003Cdiv class=\\"bar\\"\\\\u003E';
+    pug_html = pug_html + '<div class=\\"bar\\">';
     pug_debug_line = 1;
     pug_html =
       pug_html +
       pug.escape(null == (pug_interp = self.foo) ? \\"\\" : pug_interp) +
-      \\"\\\\u003C\\\\u002Fdiv\\\\u003E\\";
+      \\"</div>\\";
   } catch (err) {
     pug.rethrow(err, pug_debug_filename, pug_debug_line);
   }
@@ -90,12 +90,12 @@ function template(locals) {
   try {
     var self = locals || {};
     pug_debug_line = 1;
-    pug_html = pug_html + '\\\\u003Cdiv class=\\"bar\\"\\\\u003E';
+    pug_html = pug_html + '<div class=\\"bar\\">';
     pug_debug_line = 1;
     pug_html =
       pug_html +
       pug_escape(null == (pug_interp = self.foo) ? \\"\\" : pug_interp) +
-      \\"\\\\u003C\\\\u002Fdiv\\\\u003E\\";
+      \\"</div>\\";
   } catch (err) {
     pug_rethrow(err, pug_debug_filename, pug_debug_line);
   }