10.0.0-beta.2

* means potential breaking changes

New since beta.1:

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

New since alpha.1:

• Fixed crash in rescript build on Windows #5516
• Fixed rescript init command not working #5526
• * 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").

Compiler

• Add support for @new @variadic (see #5364)
• New records with @optional fields #5423 #5452
• Classify bigint correctly #5351
• * @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
• Proper M1 support (CI now supports M1 native builds)

Syntax

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

Libraries

• * Removed printing modules (Printf, Format etc) and related functions. Details of files added/removed: 0fd8bb0.
• * There could be issues with rescript-relay. See #5493.
• Several Belt / Js libraries are now converted to ReScript syntax, with corresponding comments in Markdown format suitable for hovering. See #5361.

Playground

• Added jsoo_playground_main.ml as the rescript-lang.org playground bundle entrypoint
• * Removed Reason syntax support for the playground experience. See #5375