CHANGELOG.md

Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[Unreleased]

Added

• Added support for the :decorators meta key in anonymous fns (#1178)

Changed

• import now returns nil instead of the last module's string representation (#1174)
• The :decorators key now works in defn when passed as a metadata name key, expanding its support to defn-derived macros like defasync (#1178).
• Change Python import machinery to be centered around Python code, rather than Basilisp namespaces (#1155, #1165)

Fixed

• Fix a bug in defn where the attr-map? and function metdata were merged into a seq instead of a map, causing macroexpand to fail in some cases (#1186)
• Fix a bug where basilisp.process/exec threw an exception when inheriting the stdout stream from the current process (#1190)
• Fix a bug where condp threw an exception in certain cases (#1194)

v0.3.5

Changed

• alter-var-root now returns the new value to align with Clojure behavior. Updated the docstring to highlight side effects of direct linking optimization (#1166)

Fixed

• Fix a regression introduced in #1161 which prevented passing namespace metadata on the name in the ns macro (#1173)

v0.3.4

Added

• Added support for the optional attr-map? on the ns macro (#1159)
• Added support for the optional pre- and post-conditions in fn forms (#1167)

Fixed

• Fix a bug where # characters were not legal in keywords and symbols (#1149)
• Fix a bug where seqs were not considered valid input for matching clauses of the case macro (#1148)
• Fix a bug where py->lisp did not keywordize string keys potentially containing namespaces (#1156)
• Fix a bug where anonymous functions using the #(...) reader syntax were not properly expanded in a syntax quote (#1160)
• Fix a bug where certain types of objects (such as objects created via deftype) could not be unquoted correctly in macros (#1153)

v0.3.3

Added

• Added support for a subset of qualified method syntax introduced in Clojure 1.12 (#1109)
• Added the basilisp.process namespace (#1108)

Changed

• The Custom Data Readers Loader will only now examine the top directory and up to its immediate subdirectories of each sys.path entry, instead of recursive descending into every subdirectory, improving start up performance (#1135)

Fixed

• Fix a bug where tags in data readers were resolved as Vars within syntax quotes, rather than using standard data readers rules (#1129)
• Fix a bug where keyword and symbol functions did not treat string arguments as potentially namespaced (#1131)
• Fix a bug where condp would throw an exception if a result expression was nil (#1137)
• Fix a bug where integer division which resulted in an integer would return a fractions.Fraction (#1140)
• Fix a bug where basilisp.core/time would fail to expand with macroexpand-all in a nested macro call (#1143)
• Fix a bug where defn and defmacro forms containing multiple arities could not be emitted by macros (#1163)

v0.3.2

Added

• Added support for constructing a data representation of reader conditionals (#1125)

Fixed

• Fix a bug where basilisp test command fails due to an invalid argparse configuration (#1119)
• Fix a bug where basilisp.walk/walk (and any functions that depend on it) did not preserve collection metadata (#1123)
• Fix a bug where the private postwalk implementation in the reader did not preserve collection metadata (#1123)
• Fix a bug where unknown data reader tags in non-selected reader conditional branches prevented reading the forms (#1118)

v0.3.1

Added

• Added support for the :param-tags reader metadata syntax ^[tag ...] from Clojure 1.12 (#1111)
• Add support for tagged literals (#1104)

Changed

• Types generated by reify may optionally be marked as ^:mutable now to prevent attrs.exceptions.FrozenInstanceErrors being thrown when mutating methods inherited from the supertype(s) are called (#1088)

Fixed

• Fix a bug where symbols and keyword containing : characters in the name were rejected by the reader (#1105)
• Fix a bug where records did not support reducing via reduce-kv (#1102)
• Fix a bug where collection modifying library functions such as conj, disj, assoc, dissoc, and empty would not preserve collection metadata (#1103)

v0.3.0

Added

• Added support for Python 3.13 (#1056)
• Added support for .cljc files (#1097)

Fixed

• Fix an issue with basilisp test standard streams output that can lead to failures on MS-Windows (#1080)
• Fix an issue where destructuring a vector would throw an exception rather than returning nil for invalid key types (#1090)
• Fix an issue where destructuring default values would take precedence over falsey values in the source data structure (#1078)
• Fix a bug where imported Python names containing - (in lieu of _) could not be referenced using the - syntax (#1085)
• Fix a compatibility issue where *print-length* defaulted to 50 instead of nil (#1093)

Removed

• Removed support for Python 3.8 (#1083)

v0.2.4

Added

• Added functions to basilisp.test for using and combining test fixtures (#980)
• Added the importing-resolve function for dynamically importing and resolving a Python name (#1065, #1070)
• Added support for highlighting matching parens, brackets, and braces at the REPL (#1074)
• Added the -p/--include-path argument to basilisp test CLI subcommand (#1075)
• Added an empty entry to sys.path for basilisp test CLI subcommand (#1075)

Fixed

• Fix a bug where the reader was double counting the CRLF newline seq in metadata (#1063)
• Conform to the cider-nrepl info ops spec by ensuring result's :file is URI, also added missing :column number (#1066)
• Fix a bug with basilisp.edn/write-string where nested double quotes were not escaped properly (#1071)
• Fix a bug where additional arguments to basilisp test CLI subcommand were not being passed correctly to Pytest (#1075)

v0.2.3

Added

• Added a compiler metadata flag for suppressing warnings when Var indirection is unavoidable (#1052)
• Added the --emit-generated-python CLI argument to control whether generated Python code strings are stored by the runtime for each compiled namespace (#1045)
• Added the ability to reload namespaces using the :reload flag on require (#1060)

Changed

• The compiler will issue a warning when adding any alias that might conflict with any other alias (#1045)
• The compiler is now capable of unrolling top level do forms (not including do forms emitted by macros) (#1028)

Fixed

• Fix a bug where Basilisp did not respect the value of Python's sys.dont_write_bytecode flag when generating bytecode (#1054)
• Fix a bug where Basilisp import names existed in the same namespace as def names, which caused some unexpected behavior (#1045)

v0.2.2

Added

• Added the -p/--include-path CLI command to prepend entries to the sys.path as an alternative to PYTHONPATH (#1027)
• Added an empty entry to sys.path for all CLI entrypoints (basilisp run, basilisp repl, etc.) (#1027)
• Added command line arguments for enabling the development logger and configuring the logging level (#1047)

Changed

• The compiler will no longer require Var indirection for top-level do forms unless those forms specify ^:use-var-indirection metadata (which currently is only used in the ns macro) (#1034)
• nREPL server no longer sends ANSI color escape sequences in exception messages to clients (#1039)

Fixed

• Fix a bug where the compiler would always generate inline function definitions even if the inline-functions compiler option is disabled (#1023)
• Fix a bug where defrecord/deftype constructors could not be used in the type's methods (#1025)
• Fix a bug where keys and vals would fail for records (#1030)
• Fix a bug where operations on records created by defrecord failed for fields whose Python-safe names were mangled by the Python compiler (#1029)
• Fix incorrect line numbers for compiler exceptions in nREPL when evaluating forms in loaded files (#1037)
• Fix issue where the compiler exception message from the nREPL server could refer to the initially loaded file instead of the updated one (#1042)

v0.2.1

Changed

• Exceptions occurring during inlining during macroexpansion are no longer obscured by the outer macroexpansion exception (#1013)

Fixed

• Fix the behaviour of nil with several collection functions (#1011)
• Fix a bug where keys and vals did not yield keys and values from sequences of map entries (#1018)
• Fix a bug where set and vec do not produce collections of map entries when called on map arguments (#1020)
• Fix lazy sequences not propagating AttributeError (#1019)

v0.2.0

Added

• Added the CollReduce and KVReduce protocols in basilisp.core.protocols and implemented reduce in terms of those protocols (#927)
• Added support for custom data readers (#924)
• Added *default-data-reader-fn* (#924)
• Added basilisp.pprint/print-table function (#983)
• Added basilisp.core/read-seq function (#986, #999)
• Added various compiler arguments to CLI commands (#989)
• Added support for destructuring namespaced symbols using the :ns/syms syntax and non-keyword values in standard associative destructuring forms (#836)

Changed

• Improved on the nREPL server exception messages by matching that of the REPL user-friendly format (#968)
• Types created via deftype and reify may declare supertypes as abstract (taking precedence over true abc.ABC types) and specify their member list using ^:abstract-members metadata (#942)
• Load functions (load, load-file, load-reader, etc.) now return the value of the last form evaluated. (#984)
• nREPL server no longer hangs waiting for client connections to close on exit (#1002)
• Align basilisp.core/deref with Clojure to by updating the timeout input argument to be in milliseconds instead of seconds (#1007)

Fixed

• Fix inconsistent behavior with basilisp.core/with when the body contains more than one form (#981)
• Fix an issue with basilisp.core/time failing when called outside basilisp.core (#991)
• Fix an issue with basilisp.core/promise where a thread waiting for a value from another thread might not wake up immediately upon delivery (#983).
• Fix using keyword as a function not returning the default value in some cases (#997)
• Fix an issue where Python SyntaxWarnings would be emitted for certain compiled code (#996)
• Fix an issue where 2- and 3-arity range invocations returned unexpected results (#1004)

Removed

• Removed python-dateutil and readerwriterlock as dependencies, switching to standard library components instead (#976)

Other

• Run PyPy CI checks on Github Actions rather than CircleCI (#971)

v0.1.1

Added

• Added several missing functions to basilisp.core (#956)

Fixed

• Fixed an issue where attempting to run a namespace from the CLI could fail in certain cases (#957)
• Fixed an issue with keep and keep-indexed two-arity forms not preserving the transformed values (#962)
• Fixed an issue with basilisp.test/is where the expected value was misreported on failure of non (= ...) expr (#965)

v0.1.0

Added

• Added :end-line and :end-col metadata to forms during compilation (#903)
• Added basilisp.repl/source to allow inspecting source code from the REPL (#205)
• Added conj 1 and 0 arities (#954)

Changed

• Updated dozens of type annotations in the compiler to satisfy MyPy 1.11 (#910)
• Update the StreamReader methods to stop using the term "token" to refer to individual UTF-8 characters (#915)
• Update the list of Python dunder methods which are allowed to be implemented for all deftype* and reify* types (#943)
• ISeq now inherits from IPersistentCollection so coll?, empty, and conj can now be used with sequences (#954)

Fixed

• Fix a bug where . characters were not allowed in keyword names (#899)
• Fix a bug where nested quotation marks were not escaped properly by various print functions and at the REPL (#894)
• Fix a bug that caused a syntax error when presenting any filepath that includes the MS-Windows \ file separator to the cli run command (#912)
• Fix a bug where the core functions symbol and keyword would not accept non-string data types (#911)
• Fix a bug where the compiler would emit warnings on when a Var was redef'ed even if that Var was initially defined with ^:redef metadata (#916)
• Fix a bug where reader column offset numbering began at 1, rather than 0 (#905)
• Fix a bug where basilisp.core/boolean was returning the boolean coercions like Python rather than like Basilisp (#928)
• Fix a bug where Basilisp vectors were not callable (#932)
• Fix a bug where basilisp.lang.seq.LazySeq instances were not thread-safe (#934)
• Fix a bug where Seqs wrapping Python Iterable instances were not thread-safe (#936)
• Fix several bugs where code was being executed from a string with interpolated variables, which could've allowed for code injection (#938)
• Fix a bug where record types and data readers whose fully qualified name started with a "b" could not be read (#947)

Other

• Add several sections to Concepts documentation module (#666)
• Add REPL documentation module (#250)
• Add documentation module for Basilisp interfaces (#920)
• Add GitHub source links to generated API documentation (#921)
• Update Concepts documentation module with See Also links for most sections (#925)
• Update Sphinx documentation theme (#909)
• Update documentation to directly reference Python documentation and fix many other minor issues and misspellings (#907, #919)

v0.1.0b2

Added

• Added filename metadata to compiler exceptions (#844)
• Added a compile-time warning for attempting to call a function with an unsupported number of arguments (#671)
• Added support for explicit cause exception chaining to the throw special form (#862)
• Added basilisp.stacktrace namespace (#721)
• Added support for *flush-on-newline* to flush the prn and println output stream after the last newline (#865)
• Added support for binding destructuring in for bindings (#774)
• Added == as an alias to = (#859)
• Added custom exception formatting for basilisp.lang.compiler.exception.CompilerException and basilisp.lang.reader.SyntaxError to show more useful details to users on errors (#870)
• Added merge-with core function (#860)
• Added fnext core function (#879)
• Added INamed interface for Keywords and Symbols (#884)
• Added *print-namespace-maps* dynamic var support (#882)

Changed

• Cause exceptions arising from compilation issues during macroexpansion will no longer be nested for each level of macroexpansion (#852)
• Support for optional metadata argument in defmulti (#857)
• Aligned rem and quot methodologies with corresponding Clojure fns (#848)

Fixed

• Fix a bug where basilisp.lang.compiler.exception.CompilerException would nearly always suppress line information in it's data map (#845)
• Fix a bug where the function returned by partial retained the meta, arities, and with_meta method of the wrapped function rather than creating new ones (#847)
• Fix a bug where exceptions arising while reading reader conditional forms did not include line and column information (#854)
• Fix a bug where names def'ed without reader metadata would cause the compiler to throw an exception (#850)
• Fix an issue where concat on maps was iterating over the keys instead of the key/value pairs (#871)
• Fix a bug where the compiler would throw an exception partially macroexpanding forms with recur forms provided as arguments (#856)
• Fix a bug where the original (var ...) form is not retained during analysis, causing it to be lost in calls to macroexpand (#888)
• Fix issue with the reader var macro failing in syntax quote when unquoting a symbol, e.g. `(#'~symbol) (#889)
• Fix issue where (str seq) was printing seq string items without quotation marks (#891)
• Fix issue where interop failed to access property name matching a builtins name (#896)

v0.1.0b1

Added

• Added support for passing through :tag metadata to the generated Python AST (#354)
• Added support for calling symbols as functions on maps and sets (#775)
• Added support for passing command line arguments to Basilisp (#779)
• Added support for autocompleting names in the python/ pseudo-namespace for Python builtins at the REPL (#787)
• Added a subcommand for bootstrapping the Python installation with Basilisp (#790)
• Added support for executing Basilisp namespaces directly via basilisp run and by python -m (#791)
• Added the memoize core fn (#812)
• Added support for thrown-with-msg? assertions to basilisp.test/is (#831)
• Added support for reading scientific notation literals, octal and hex integer literals, and arbitrary base (2-36) integer literals (#769)
• Added support for passing trailing maps to functions which accept Basilisp keyword arguments (#663)
• Added support for loading namespaces as an alias only (#664)

Changed

• Optimize calls to Python's operator module into their corresponding native operators (#754)
• Allow vars to be callable to adhere to Clojure conventions (#767)
• Adjust input path compatibility in basilisp.core/load input path to be relative to the namespace or the root path (#782)
• No longer warn on unused bindings when their name begins with _ (#756)
• Improve the Python generation for do, if, let*, and letfn* forms to avoid unnecessary extra assignments (#793, #794, #799)
• Generate Python classes for deftype* and reify* forms using modern @attr.define, @attr.frozen, and @attr.field APIs (#799)
• Generate Protocol functions with nicer names based on the protocol function and dispatch type (#803)
• Loosen the dependency specification for Immutables and Pyrsistent to allow for a wider version range (#805)
• Allow case forms with only a default expression (#807)
• Make pr a dynamic variable (#820)
• Emit OS specific line endings for the println and prn fns (#810)
• Support any character in character literals (#816)
• Loosen typing-extensions dependency's minimal version to 4.7.0 (#809)

Fixed

• Fix issue with (count nil) throwing an exception (#759)
• Fix issue with keywords not testing for membership in sets when used as a function (#762)
• Fix an issue for executing Basilisp scripts via a shebang where certain platforms may not support more than one argument in the shebang line (#764)
• Fix issue with keywords throwing TypeError when used as a function on vectors (#770)
• Fix an issue where the constructors of types created by deftype and defrecord could not be called if they contained - characters (#777)
• Fix issue with the variadic ampersand operator treated as a binding in macros (#772)
• Fix a bug the variadic arg symbol was not correctly bound to nil when no variadic arguments were provided (#801)
• Fix a bug where the quotient of very large numbers was incorrect (#822)
• Fix a bug where basilisp.test/is may fail to generate expected/actual info on failures when declared inside a macro (#829)
• Fix a bug where sequential destructuring bindings do not bind names correctly when nested within associative destructuring bindings (#834)

Removed

• Removed support for PyPy 3.8 (#785)

Other

• Improve the state of the Python type hints in basilisp.lang.* (#797, #784)
• Update Sphinx and its associated contrib libraries to ^7.1.0 (#815)

v0.1.0b0

Added

• Added rudimentary support for clojure.stacktrace with print-cause-trace (part of #721)
• Added support for bytes literals using a #b prefix (#732)
• Added support for Python 3.12 (#734)
• Added a default reader conditional for the current platform (windows, darwin, linux, etc.) (#692)
• Added support for bencode binary encoding (part of #412)
• Ported nbb's nrepl-server module to basilisp (#412)

Changed

• Basilisp now supports PyTest 7.0+ (#660)

Fixed

• Fix issue with case evaluating all of its clauses expressions (#699)
• Fix issue with relative paths dropping their first character on MS-Windows (#703)
• Fix incompatibility with (str nil) returning "nil" (#706)
• Fix sort-by support for maps and boolean comparator fns (#709)
• Fix sort support for maps and boolean comparator fns (#711)
• Fix (is (= exp act)) should only evaluate its args once on failure (#712)
• Fix issue with with failing with a traceback error when an exception is thrown (#714)
• Fix issue with sort-* family of funtions returning an error on an empty seq (#716)
• Fix issue with intern failing when used (#725)
• Fix issue with ns not being available after in-ns on the REPL (#718)
• Fixed issue with import modules aliasing using ns eval (#719)
• Fix issue with ns-resolve throwing an error on macros (#720)
• Fix issue with py module readerwritelock locks handling (#722)
• Fix issue with basilisp.io/writer :append mode not working (#741)
• Fix issue with attempting to inline functions which reference other Python modules that aren't available in the inline destination (#746)

Removed

• Removed the dependency astor for versions of Python 3.9+ (#736)
• Removed basilisp.__version__ in favor of using importlib.metadata for version info (#617)
• Removed a shim to Python's ast module to support compatibility with Python 3.6 and 3.7 (#749)

Other

• Switch to PyLint and Ruff for linting from Prospector (#739)

v0.1.0a2

Added

• Added support for fixtures in basilisp.test (#654)
• Added support for Python 3.10 and 3.11 (#659, #693)
• Added a Sphinx autodoc plugin for generating API documentation for Basilisp namespaces (#658)
• Added support for rewriting required namespaces starting with clojure. as basilisp. if the original name isn't found on the import path (#670, #676)
• Added support for inlining simple functions (#673)
• Added the clojure.core functions from v1.11 (#672)

Changed

• Set tighter bounds on dependency version ranges (#657)
• Improved on and completed several different sections of the documentation (#661, #669)
• Delete unused utility functions after they are generated and executed by the REPL to save memory (#674)

Fixed

• Fixed the with macro definition to match the Python language spec (#656)
• Fixed a bug where py->lisp did not convert map keys or values into Basilisp objects (#679)

Other

• Run CPython CI checks on Github Actions rather than CircleCI (#683)
• Remove support for Python 3.6 and 3.7, which are both EOL (#691)
• Fix test suite failures on Windows and add Github Actions runners for testing on Windows (#688)
• Update Prospector version for linting (#694)

v0.1.0a1

Added

• Added a bootstrapping function for easily bootstrapping Basilisp projects from Python (#620)
• Added support for watchers and validator functions on Atoms and Vars (#627)
• Added support for Taps (#631)
• Added support for hierarchies (#633)
• Added support for several more utility Namespace and Var utility functions (#636)
• Added basilisp.io namespace with polymorphic reader and writer functions (#645)
• Added support for coroutines and generators using yield syntax (#652)

Changed

• PyTest is now an optional extra dependency, rather than a required dependency (#622)
• Generated Python functions corresponding to nested functions are now prefixed with the containing function name, if one exists (#632)
• basilisp.test/are docstring now indicates that line numbers may be suppressed on assertion failures created using are (#643)
• Multimethods now support providing a custom hierarchy and dispatch to registered values using isa? (#644)

Fixed

• Fixed a bug where seqing co-recursive lazy sequences would cause a stack overflow (#632)
• Fixed a spurious failure in the test runner and switched to using macro forms for test line numbers (#631)
• Fixed a bug that allowed dynamic Vars to be set! even if they weren't thread-bound (#638)
• Fixed a bug where it was impossible to specify negative CLI options for the compiler flags (#638)
• Fixed a bug where it was impossible to use more than a single body expression in a try special form (#640)
• Fixed a bug where re-defing a Var (regardless of ^:redef metadata) would not update metadata or dynamic flag (#642)
• Fixed a bug where private Vars could be resolved from the source namespace of a public macro during macroexpansion (#648)
• Fixed a bug where trailing quotes were not allowed in Symbols and Keywords (#650)

Removed

• Removed Click as a dependency in favor of builtin argparse (#622, #624, #636)
• Removed Atomos as a dependency in favor of readerwriterlock (#624)

v0.1.dev15

Added

• Added support for auto-resolving namespaces for keyword from the current namespace using the ::kw syntax (#576)
• Added support for namespaced map syntax (#577)
• Added support for numeric constant literals for NaN, positive infinity, and negative infinity (#582)
• Added *basilisp-version* and *python-version* Vars to basilisp.core (#584)
• Added support for function decorators to defn (#585)
• Added the current Python version (:lpy36, :lpy37, etc.) as a default reader feature for reader conditionals (#585)
• Added default reader features for matching Python version ranges (:lpy36+, :lpy38-, etc.) (#593)
• Added lazy-cat function for lazily concatenating sequences (#588)
• Added support for writing EDN strings from basilisp.edn (#600)
• Added a persistent queue data type (#606)
• Added support for transducers (#601)
• Added support for Python 3.9 (#608)
• Added support for 3-way comparators (#609)

Changed

• Moved basilisp.lang.runtime.to_seq to basilisp.lang.seq so it can be used within that module and by basilisp.lang.runtime without circular import (#588)
• Keyword hashes are now pre-computed when they are created, so they do not need to be recomputed again to be fetched from the intern cache (#592)
• The compiler now uses the pre-computed hash to lookup keywords directly, which should improve lookup time for repeated invocations (#592)
• Symbol hashes are now pre-computed when they are created (#592)
• Moved basilisp.core.template to basilisp.template to match Clojure (#599)
• Refactor compiler to use functools.singledispatch for type based dispatch (#605)
• Rename List, Map, Set, and Vector to PersistentList, PersistentMap, PersistentSet, and PersistentVector respectively (#605)

Fixed

• Fixed a bug where def forms did not permit recursive references to the def'ed Vars (#578)
• Fixed a bug where concat could cause a RecursionEror if used on a LazySeq instance which itself calls concat (#588)
• Fixed a bug where map literals in function reader macro forms caused errors during reading (#599)
• Fixed a bug where some-> and some->> threading macros would thread nil first arguments (#599)

Removed

• Removed pyfunctional dependency in favor of Python standard library functions (#589)

Other

• Basilisp uses poetry for dependency and virtual environment management, as well as for publishing to PyPI (#616)

v0.1.dev14 - 2020-06-18

Added

• Added support for futures (#441)
• Added support for calling Python functions and methods with keyword arguments (#531)
• Added support for Lisp functions being called with keyword arguments (#528)
• Added support for multi-arity methods on deftypes (#534)
• Added metadata about the function or method context of a Lisp AST node in the NodeEnv (#548)
• Added reify* special form (#425)
• Added support for multi-arity methods on definterface (#538)
• Added support for Protocols (#460)
• Added support for Volatiles (#460)
• Added JSON encoder and decoder in basilisp.json namespace (#484)
• Added support for generically diffing Basilisp data structures in basilisp.data namespace (#555)
• Added support for artificially abstract bases classes in deftype, defrecord, and reify types (#565)
• Added support for transient maps, sets, and vectors (#568)

Changed

• Basilisp set and map types are now backed by the HAMT provided by immutables (#557)
• get now responds nil (or its default) for any unsupported types (#570)
• nth now supports only sequential collections (or nil) and will throw an exception for any invalid types (#570)
• Use functools.singledispatch for to achieve higher performance polymorphism on most runtime functions (#552, #559)
• Update the keyword cache to use a Python threading.Lock rather than an Atom (#552)
• rest no longer returns nil, it always returns an empty sequence (#558)

Fixed

• Fixed a bug where the Basilisp AST nodes for return values of deftype members could be marked as statements rather than expressions, resulting in an incorrect nil return (#523)
• Fixed a bug where defonce would throw a Python SyntaxError due to a superfluous global statement in the generated Python (#525)
• Fixed a bug where Basilisp would throw an exception when comparing seqs by = to non-seqable values (#530)
• Fixed a bug where aliased Python submodule imports referred to the top-level module rather than the submodule (#533)
• Fixed a bug where static methods and class methods on types created by deftype could not be referred to directly (defeating the purpose of the static or class method) (#537)
• Fixed a bug where deftype forms could not be declared without at least one field (#540)
• Fixed a bug where not all builtin Basilisp types could be pickled (#518)
• Fixed a bug where deftype forms could not be created interfaces declared not at the top-level of a code block in a namespace (#376)
• Fixed multiple bugs relating to symbol resolution of imported symbols in various contexts (#544)
• Fixed a bug where the = function did not respect the equality partition for various builtin collection types (#556)
• Fixed a bug where collection types could evaluate as boolean false (#566)
• Fixed a bug where reduce required a 1-arity function for the variant with an initial value, rather than returning that initial value (#567)

v0.1.dev13 - 2020-03-16

Added

• Added support for Shebang-style line comments (#469)
• Added multiline REPL support using prompt-toolkit (#467)
• Added node syntactic location (statement or expression) to Basilisp AST nodes emitted by the analyzer (#463)
• Added letfn special form (#473)
• Added defn-, declare, and defonce macros (#480)
• Added EDN reader in the basilisp.edn namespace (#477)
• Added line, column, and file information to reader SyntaxErrors (#488)
• Added context information to the CompilerException string output (#493)
• Added Array (Python list) functions (#504, #509)
• Added shell function in basilisp.shell namespace (#515)
• Added apply-template function to basilisp.core.template namespace (#516)

Changed

• Change the default user namespace to basilisp.user (#466)
• Changed multi-methods to use a threading.Lock internally rather than an Atom (#478)
• Changed the Basilisp module type from types.ModuleType to a custom subtype with support for custom attributes (#482)
• Basilisp's runtime function Namespace.get_or_create no longer refers basilisp.core by default, which allows callers to exclude basilisp.core names in the ns macro (#481)
• Namespaces now use a single internal lock rather than putting each property inside of an Atom (#494)
• Refactor the testrunner to use fewer atoms in basilisp.test (#495)

Fixed

• Fixed a reader bug where no exception was being thrown splicing reader conditional forms appeared outside of valid splicing contexts (#470)
• Fixed a bug where fully Namespace-qualified symbols would not resolve if the current Namespace did not alias the referenced Namespace (#479)
• Fixed a bug where the quote special form allowed more than one argument and raised an unintended exception when no argument was provided (#497)
• Fixed a bug where compiler options specified via command-line argument or environment variable were not honored by the importer (#507)
• Fixed a bug where private Vars from other Namespaces could be referenced if the Namespace was aliased when it was required (#514)
• Fixed a bug where collections with trailing end tokens separated from the collection only by a comment (#520)

v0.1.dev12 - 2020-01-26

Added

• Added new control structures: dotimes, while, dorun, doall, case, for, doseq, .., with, doto (#431)
• Added basilisp.walk namespace with generic tree-walker functions (#434)
• Added several new higher-order functions (#433)
• Added basilisp.template namespace with templating utility functions (#433)
• Added basilisp.test/are for writing multiple similar assertions (#433)
• Added many new collection and sequence functions (#439)
• Added support for Promises (#440)
• Added support for Python 3.8 (#447)
• Added vary-meta, alter-meta!, and reset-meta! utility functions (#449)
• Added support for the primitive type coercion API (#451)
• Added support for the unchecked arithmetic API (#452)
• Added a Makefile utility for generating the Python code for basilisp.core (#456)

Changed

• Compile attrs instances internally without cmp keyword argument for attrs >= 19.2.0 (#448)
• Small Python changes in the compiler to remove redundant operations (#450)

Fixed

• Fixed an issue where macroexpand and macroexpand-1 attempted to resolve symbols rather than leaving them unresolved (#433)
• Fixed an issue with transient macro namespace symbol resolution in the analyzer (#438)
• Fixed a bug where ISeq iterators could stack overflow for long sequences (#445)
• Fixed the importer test suite's use of multiprocessing for Python 3.8 (#446)
• Correct the with-meta interface and replace incorrect usages with vary-meta (#449)
• Fixed an issue where line/column metadata was not properly being fetched by the analyzer (#454)
• Warnings for Basilisp code now indicate namespace and line number of that code (#457)
• Errors resolving nested symbols are now much more helpful (#459)

v0.1.dev11 - 2019-07-27

Added

• macroexpand and macroexpand-1 functions (#394)
• reset-vals! and swap-vals! Atom functions (#399)
• format, printf, and a few other formatting functions (#401)
• rand, rand-int, and a few other basic random functions (#402)
• assoc-in, update-in, and a few other associative utility functions (#404)
• Several namespace utility functions (#405)
• Preliminary support for Python 3.8 (#406 and #407)
• Added the ILookup interface to IAssociative (#410)
• Support for Reader Conditional syntax (#409)

Changed

• Python builtins may now be accessed using the python namespace from within Basilisp code, rather than builtins (#400)
• Basilisp code files can now be named and organized more like Clojure projects. __init__ files are not necessary, though they may still be used. Folders can bear the same name as a namespace file, which will allow nesting. (#393)
• Renamed Basilisp's parser module to analyzer, to more accurately reflect it's purpose (#390)
• Changed binding behavior to use push-thread-bindings and pop-thread-bindings, which use a thread-local for bindings, to more closely emulate Clojure (#405)
• Internal IAsssociative.entry usages have been changed to ILookup.val_at (#410)

Fixed

• Allow direct code references to static methods and fields (#392)

v0.1.dev10 - 2019-05-06

Added

• Added support for Record data types (#374, #378, and #380)
• Lots more useful core library functions (#373)

Changed

• Refactor core interfaces under basilisp.lang.interfaces module (#370)
• Organize interface hierarchy to match Clojure's (#372)
• Compile qualified basilisp.lang.* module references down to aliased references (#366)
• let and loop forms may now have empty binding vectors and empty bodies (#382)

v0.1.dev9 - 2019-03-29

Added

• Add support for custom data types (#352)
• Add an environment variable which allows users to disable emitting Python AST strings (#356)
• Functions now support metadata (#347)
• defn forms can attach metadata to functions via an attribute map (#350)
• Basilisp code can be executed as a script via the CLI from standard in (#349)
• Support for async functions (via :async metadata or defasync form) and new await special form (#342)
• Symbol and keyword completion at the REPL if readline is available (#340)
• Macro environment is now being passed as the first argument of macros (#339)
• Create Python literals using #py reader tag and corresponding Basilisp data structure (#337)

Fixed

• Nested Python imports can no longer be obscured by their parent module name (#360)

v0.1.dev8 - 2019-03-10

Added

• Basilisp compiler parses Basilisp code into an intermediate AST prior to Python code generation (#325)
• Add meta to def forms in the compiler (#324)
• Switch builtin exceptions to use attrs (#334)

Fixed

• Quoted interop forms and properties no longer emit errors (#326)
• Improve test suite performance by using a mutable dict for lrepr kwargs generation (#331)
• Attach line and column metadata to functions, quoted, and deref forms (#333)
• Log internal nth messages as TRACE rather than DEBUG (#335)

v0.1.dev7 - 2018-12-18

Added

• Add loop special form (#317)
• Add Lisp repr support using LispObject abstract base class (#316)
• Python imports may be aliased like require using a vector (#319)
• The compiler emits a warning when a local symbol is unused (#314)
• The compiler can optionally emit a warning when a local name or Var name is shadowed (#303, #312)
• The compiler can optionally emit a warning when a Var reference requires indirection (#306)

Fixed

• basilisp.core/ns-resolve can now resolve aliased symbols (#313)
• Python interop calls can now be made within threading macros (#308)

Other

• Basilisp source code is now released under the EPL 1.0

v0.1.dev6 - 2018-11-02

Added

• Print functions respect output stream bound to *out* (#257)
• Capture line numbers for test failures and errors (#270)
• Support threading macros (#284)
• Support redefinable Vars and suppressing warnings when Vars are redefined (#292)
• Add more core functions (#293, #296, #298)
• Support destructuring of arguments in fn and bindings in let (#289)
• Add set library functions (#261)

Fixed

• Keyword string and repr are now identical (#259)
• Don't attempt to resolve names inside syntax-quote (#272)
• Properly resolve names inside catch blocks (#273)
• Loosen syntax requirements for interop properties (#276)
• Fix basilisp.core/map lazy sequence behavior (#278)
• Allow empty function definitions (#280)
• Allow the dollar sign $ in symbols (#286)
• Report exceptions caught in the test runner as errors (#300)

v0.1.dev5 - 2018-10-14

Added

• Add a logger to Basilisp library code (with a default NullHandler) (#243)
• Implement Bytecode caching for compiled Basilisp modules (#244)

v0.1.dev4 - 2018-09-29

Changed

• Bump version to support Python 3.7 on PyPI

v0.1.dev3 - 2018-09-29

Added

• Add multi-methods to Basilisp (#222)
• The Basilisp PyTest runner now prints exception messages for non-failure errors (#235)
• Add a few new namespace functions to basilisp.core (#224)
• Create namespace setting context managers for use in tests (#228)

Fixed

• Removed usages of seq.grouped from PyFunctional which throw StopIteration exceptions and cause Basilisp to be unusable with Python 3.7 (#221)
• Fix a bug where the wrong namespace may be set in deftest defined tests (#232)
• Fix a bug where non-symbols could not appear in the member position of Python interop special forms (#230)
• Fix several instances of bugs where Basilisp tests were changing basilisp.core/*ns* without resetting it, which would cause cascading test failures (#228)

v0.1.dev2 - 2018-09-27

Added

• Add PyTest runner tests written using the basilisp.test/deftest macro (#195)
• Throw a useful error when no Var is bound to a symbol (#197)
• Add a string library as basilisp.string (#187)
• Add regex functions to basilisp.core (#193)
• Add namespace functions to basilisp.core (#176)
• The reader can return a custom EOF indicator (#218)

Fixed

• Fixed a bug where comment literals were not be fully removed from reader outputs (#196)
• Fixed a bug where comment literals caused syntax errors inside collection literals (#196)
• Imported namespaces no longer create extra namespaces bound to munged Python module names (#216)
• Fixed a bug where import*s would not work within other forms
• Fixed a bug where the Basilisp import hook could be added to sys.meta_path multiple times (#213)
• Fixed a bug where keywords could not be used in function position (#174)
• Fixed a bug where macro symbols were not resolved using the same heuristics as other symbols (#183)
• Fixed a bug where lazy sequences were not resolved even if they were empty-checked (#182)
• Fixed a bug where new namespaces were created whenever the compiler checked if a namespace existed to resolve a symbol (#211)
• Fixed a bug where Python string escape sequences were not handled correctly by the reader (#192)
• Fixed a bug where character literals caused a syntax error inside collections (#192)

v0.1.dev1 - 2018-09-13

Added

• Basic CLI for REPL and running scripts
• REPL convenience functions doc and pydoc will return Basilisp and Python documentation respectively
• Vars containing the last 3 expression results (*1, *2, *3) and last exception (*e) are now included on the REPL
• Added support for Decimal, Fraction, and complex types
• Support for Clojure style object instantiation syntax: (new com.lisp.Object) or (com.list.Object.)
• Read/eval functions in basilisp.core
• Support for customizing data readers either by binding *data-readers* or supplying a keyword argument from Python
• Support for character literals using \a syntax
• Support for deref-literals using @

Fixed

• Dynamic vars are now properly compiled as dynamic, allowing thread-local bindings
• let* bindings can no longer eagerly evaluate binding expressions in conditional branches which will not be taken
• catch expressions no longer throw an error when they appear in a syntax-quote
• Basilisp files imported using the Basilisp import hook now properly resolve symbols in syntax quotes
• Basilisp's Map type now supports consing other maps.
• Syntax quoted special forms are no longer resolved into namespaced symbols

v0.1.dev0 - 2018-08-31

Added

• Basilisp language and compiler base.