Release v0.4.0

[chrisrink10]

Added

• Added support for referring imported Python names as by from ... import ... (Feature request: Add support for :refer option in import #1154)
• Added the basilisp.url namespace for structured URL manipulation (basilisp.url namespace #1239)
• Added support for proxies (Proxies #425)
• Added a :slots meta flag for deftype to disable creation of __slots__ on created types (Support creating types via deftype without __slots__ #1241)
• Added support for f-strings (f-string support #922)
• Added the aslice macro to facilitate the use of Python style array[start:stop:step] slicing in Basilisp (Proposal: add aslice macro to facilitate Python slicing syntax #1248)
• Added the IPending interface which is implemented by delays, futures, and promises (Add IPending interface #1260)
• Added the basilisp.pprint namespace (basilisp.pprint namespace #513)

Changed

• Removed implicit support for single-use iterables in sequences, and introduced iterator-seq to explicitly handle them (Unexpected behavior when passing a Python generator to a map #1192)
• basilisp.core/str now delegates to the builtin Python str in all cases except for customizing the string output for builtin Python types (Cannot override the __str__ for a records or deftypes #1237)
• Optimised mainstream seq-consuming functions by coercing their inputs into seq upfront (optimisation: standard library seq functions should coerce inputs before using them #1234)
• Renamed awith and afor to with-async and for-async for improved clarity (Proposal: add aslice macro to facilitate Python slicing syntax #1248)
• basilisp.main.init will only initialize the runtime environment on the first invocation (feature request: seamless import of Basilisp libraries in Python with implicit bootstrapping #1242)
• Updated support for PyPy to 3.9 and 3.10 (Bump PyPy version support to 3.9 and 3.10 #1265)

Fixed

• Fix a bug where protocols with methods with leading hyphens in method names could not be defined (protocols with hyphen and multiple parameters #1230)
• Fix a bug where attempting to :refer a non-existent Var from another namespace would throw an unhelpful exception (Error message on non-existent refer Var is not helpful #1231)
• Fixed a bug where (range 0) would return (0) rather than than () as expected (basilisp.pprint namespace #1258)

New Contributors

• @amano-kenji made their first contribution in Replace every? some? with every? identity #1245
• @ShalokShalom made their first contribution in correct typo #1257
• @jf made their first contribution in docs/gettingstarted.rst: give a better project structure tree for better clarity about namespace leaf- and branch-ing. #1259

Full Changelog: v0.3.8...v0.4.0

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This discussion was created from the release Release v0.4.0.