Release 12.0.0-alpha.1 · rescript-lang/rescript

Allow @directive on functions for emitting function level directive code (let serverAction = @directive("'use server'") (~name) => {...}). #6756
Add rewatch to the npm package as an alternative build tool. #6762
Throws an instance of JavaScript's new Error() and adds the extension payload for cause option. #6611
Allow free vars in types for type coercion e :> t. #6828
Allow private in with constraints. #6843
Add regex literals as syntax sugar for @bs.re. #6776
Improved mechanism to determine arity of externals, which is consistent however the type is written. #6874 #6881 #6883

Make j and js allowed names for tag functions. #6817
lazy syntax is no longer supported. If you're using it, use Lazy module or React.lazy_ instead. #6342
Remove handling of attributes with bs. prefix (@bs.as -> @as etc.). #6643
Remove obsolete @bs.open feature. #6629
Drop Node.js version <18 support, due to it reaching End-of-Life. #6429
Remove deprecated -bs-super-errors option. #6814
Some global names and old keywords are no longer prefixed. #6831
Remove ml parsing tests and conversion from .ml to .res via format. #6848
Remove support for compiling .ml files, and general cleanup. #6852
Remove rescript convert subcommand. #6860
Remove support for @bs.send.pipe. This also removes all functions in Js_typed_array that rely on @bs.send.pipe. #6858 #6891
Remove deprecated Js.Vector and Js.List. #6900

Fix unhandled cases for exotic idents (allow to use exotic PascalCased identifiers for types). #6777 #6779 #6897
Fix unused attribute check for @as. #6795
Reactivate unused attribute check for @int. #6802
Fix issue where using partial application ... can generate code that uses Curry at runtime. #6872
Avoid generation of Curry with reverse application |>. #6876
Fix issue where the internal ppx for pipe -> would not use uncurried application in uncurried mode. #6878

Build with OCaml 5.2.0. #6797
Convert OCaml codebase to snake case style. #6702
Fix -nostdlib internal compiler option. #6824
Remove a number of ast nodes never populated by the .res parser, and resulting dead code. #6830
Remove coercion with 2 types from internal representation. Coercion e : t1 :> t2 was only supported in .ml syntax and never by the .res parser. #6829
Convert caml_format and js_math to .res. #6834
Convert js.ml files to .res. #6835
Remove old .ml tests. #6847
Make compiler libs ready for uncurried mode. #6861
Make tests ready for uncurried mode. #6862
Make gentype tests uncurried. #6866
Remove @@uncurried.swap, which was used for internal tests. #6875
Build the compiler libraries/tests in uncurried mode. #6864
Ignore -uncurried command-line flag. #6885
Cleanup: remove tracking of uncurried state in parser/printer. #6888
Remove %opaque primitive. #6892
Reunify JsxC/JsxU -> Jsx etc. #6895
Remove the transformation of foo(1,2) into Js.Internal.opaqueFullApply(Internal.opaque(f), 1, 2), and change the back-end to treat all applications as uncurried. #6893

Make the --help arg be prioritized in the CLI, so correctly prints help message and skip other commands. #6667
Remove redundant space for empty return in generated js code. #6745
Remove redundant space for export in generated js code. #6560
Remove redundant space after continue in generated js code. #6743
Remove empty export blocks in generated js code. #6744
Fix indent for returned/thrown/wrapped in parentheses objects in generated js code. #6746
Fix indent in generated js code. #6747
In generated code, use let instead of var. #6102
Turn off transformation for closures inside loops when capturing loop variables, now that let is emitted instead of var. #6480
Improve unused attribute warning message. #6787
Remove internal option use-stdlib from build schema. #6778
Fix Js.Types.JSBigInt payload to use native bigint type. #6911
Deprecate %external extension, which has never been officially introduced. #6906

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