Consistent Representation Language Framework (crlf)

Use JSON encoding to communicate language-specific abstract syntax trees. Possible uses include:

• Packaging code for remote execution
• Intermediate format for language tool-chains
• Embedding language fragments within another language

{
    "lang": <language identifier>,
    "ast": <abstract syntax tree>
}

The value of the lang property specifies the interpretation of the value of the ast property.

lang value	Description
JSON	JavaScript Object Notation
VO	Abstract Value-Object Expressions
lambda	Untyped Lambda-calculus
PEG	Parsing Expression Grammars
actor	Primitive actions for the Actor-model of computation
BART	Blockly Actor Run-Time
Humus	Humus Actor-Programming Language

Abstract Compilation

The ast property value represents the source language for a particular type of crlf object. This source consists entirely of abstract values which can be represented by JSON:

• null
• Boolean (true and false)
• Number
• String
• Array
• Object

The lang property value specifies a compiler for this type of crlf object. The compiler translates the source value into an implementation-specific object. The abstract semantics of this object are defined by each language.