10.0.0-beta.3

Beta 3

🐛 Bug Fix

• Fix issue with compiler log not terminated that causes problems with editor extension not clearing issues when fixed #5545

Beta 2

💅 Polish

• Changed Linux build to depend on GLIBC 2.28 again for compatibility with Debian 10.

Beta 1

🐛 Bug Fix

• Fixed crash in rescript build on Windows #5516
• Fixed rescript init command not working #5526

💥 Breaking Change

• bsconfig.json does not support // line comments anymore
• Externals without @val annotations do not work anymore, and externals with = "" give an error.
• Regular expressions don't need escaping. E.g. let blockCommentsRe = %re("/\\/\\*([^*]|[\\r\\n]|(\\*+([^*/]|[\\r\\n])))*\\*+\\//g") is now let blockCommentsRe = %re("/\/\*([^*]|[\r\n]|(\*+([^*/]|[\r\n])))*\*+\//g").

Alpha 1

Compiler

🚀 New Feature

• Add support for @new @variadic (see #5364)
• New records with @optional fields #5423 #5452

🐛 Bug Fix

• Classify bigint correctly #5351

💥 Breaking Change

• @bs.send.pipe is now removed. Earlier it was deprecated.
• Missing labels in function application is now an error (https://forum.rescript-lang.org/t/ann-more-strict-checks-in-missed-labels/2117).
• Fix Js.String.match_ return type #5070

🏠 [Internal]

• Proper M1 support (CI now supports M1 native builds)

Syntax

🚀 New Feature

• Doc comments /** ... */ are now supported. Inernally, they are attributes, so are only valid at positions where @foo is allowed, or a syntax error is given. Similarly for module-level /*** comments */ that can go where @@attributes go.

🐛 Bug Fix

• Fix printing for inline nullary functor types #477
• Fix stripping of quotes for empty poly variants #474
• Implement syntax for arity zero vs arity one in uncurried application in #139
• Fix parsing of first class module exprs as part of binary/ternary expr in #256
• Fix formatter hanging on deeply nested function calls #261

💥 Breaking Change

• Remove parsing of "import" and "export" which was never officially supported.

Libraries

💥 Breaking Change

• Removed printing modules (Printf, Format etc) and related functions. Details of files added/removed: 0fd8bb0.
• There could be issues with rescript-relay. See #5493.

💅 Polish

• Several Belt / Js libraries are now converted to ReScript syntax, with corresponding comments in Markdown format suitable for hovering. See #5361.

Playground

🏠 Internal

• Added jsoo_playground_main.ml as the rescript-lang.org playground bundle entrypoint

💥 Breaking Change

• * Removed Reason syntax support for the playground experience. See #5375