rescript-compiler

🐛 Bug Fix

• Fix tag function location on compiler error. https://github.com/rescript-lang/rescript-compiler/pull/6816
• Fix Deno compatibility issues on Windows. https://github.com/rescript-lang/rescript-compiler/pull/6850
• Fix issue with infinite loops with type errors on recursive types. https://github.com/rescript-lang/rescript-compiler/pull/6867
• Ignore @uncurry attribute in uncurried mode, to avoid generating calls to Curry at runtime. https://github.com/rescript-lang/rescript-compiler/pull/6869
• Avoid generating calls to Curry when adjusting arity of uncurried functions. https://github.com/rescript-lang/rescript-compiler/pull/6870
• Fix build after calling without -warn-error, see https://github.com/rescript-lang/rescript-compiler/issues/6868 for more details. https://github.com/rescript-lang/rescript-compiler/pull/6877
• Fix issue with uninitialized _param in recursive functions with unit argument. https://github.com/rescript-lang/rescript-compiler/pull/6907

🐛 Bug Fix

• Omit standard library dir from load path if -nostdlib is set. https://github.com/rescript-lang/rescript-compiler/pull/6833

🐛 Bug Fix

• Fix issue where capitalised type variables were only allowed in certain positions. https://github.com/rescript-lang/rescript-compiler/pull/6820

🚀 New Feature

• Support Windows 11 ARM (using the x64 binaries in emulation). https://github.com/rescript-lang/rescript-compiler/pull/6813

🐛 Bug Fix

• Fix location of let bindings with attributes. https://github.com/rescript-lang/rescript-compiler/pull/6791
• PPX v4: mark props type in externals as @live to avoid dead code warnings for prop fields in the editor tooling. https://github.com/rescript-lang/rescript-compiler/pull/6796
• Fix issue where optional labels were not taken into account when disambiguating record value construction. https://github.com/rescript-lang/rescript-compiler/pull/6798
• Fix issue in gentype when type Jsx.element surfaces to the user. https://github.com/rescript-lang/rescript-compiler/pull/6808
• Fix inclusion check (impl vs interface) for untagged variants, and fix the outcome printer to show tags. https://github.com/rescript-lang/rescript-compiler/pull/6669
• Fix encoding inside tagged template literals. https://github.com/rescript-lang/rescript-compiler/pull/6810

🐛 Bug Fix

• Fix issue of incorrect switch cases with identical bodies when mixing object and array. https://github.com/rescript-lang/rescript-compiler/pull/6792
• Fix formatter eats comments on the first argument of a uncurried function. https://github.com/rescript-lang/rescript-compiler/pull/6763
• Fix formatter removes parens in pipe operator with anonymous uncurried function. https://github.com/rescript-lang/rescript-compiler/pull/6766

ReScript 11.1, which builds upon the foundation laid by ReScript 11.0 earlier this year, comes with a host of exciting additions.

🚀 Highlights

• JSX for More Than React
• Tagged Template Literals
• Import Attributes
• BigInt Support
• Array Spread Syntax
• Hyphens in JSX Tag Names
• Omit Trailing Undefined in External Function Calls
• %todo and warn-error

📋 More Information

• ReScript 11.1 Release Blog Post
• Changelog

🚀 New Feature

• Add %todo extension for leaving implementation for later. https://github.com/rescript-lang/rescript-compiler/pull/6713
• Add -warn-error argument for generating errors in CI. Useful for %todo extension. https://github.com/rescript-lang/rescript-compiler/pull/6717

🐛 Bug Fix

• Improve error when using @deriving(accessors) on a variant with record arguments. https://github.com/rescript-lang/rescript-compiler/pull/6712
• Stop escaping JSX prop names with hyphens. https://github.com/rescript-lang/rescript-compiler/pull/6705
• Fix trailing undefined for optional parameters not omitted with @send and @new. https://github.com/rescript-lang/rescript-compiler/pull/6716
• Fix JSX4 adding the incorrect type annotation for the prop ref in React.forwardRef component. https://github.com/rescript-lang/rescript-compiler/pull/6718
• Fix description for warning number 110. https://github.com/rescript-lang/rescript-compiler/pull/6725

💅 Polish

• Module spec es6 and es6-global is deprecated in favor of esmodule. https://github.com/rescript-lang/rescript-compiler/pull/6709

🐛 Bug Fix

• Fix variance setting for builtin dict type. Fixes issues around inference. https://github.com/rescript-lang/rescript-compiler/pull/6707

🚀 New Feature

• Add experimental BigInt support. https://github.com/rescript-lang/rescript-compiler/pull/6670, https://github.com/rescript-lang/rescript-compiler/pull/6696

🐛 Bug Fix

• Fix mishandling of uncurried functions in super errors. https://github.com/rescript-lang/rescript-compiler/pull/6694

🐛 Bug Fix

• Fix misparsing in/after JSX. https://github.com/rescript-lang/rescript-compiler/pull/6686
• Fix @deriving(accessors) outputting curried functions in uncurried mode. https://github.com/rescript-lang/rescript-compiler/pull/6687

🐛 Bug Fix

• Fix emitting static import instead of dynamic import. https://github.com/rescript-lang/rescript-compiler/pull/6664
• Fix local type variables breaking react components. https://github.com/rescript-lang/rescript-compiler/pull/6665
• Fix remove redundant branches in generated switch body. https://github.com/rescript-lang/rescript-compiler/pull/6672

💅 Polish

• Omit undefined in external function calls for trailing optional arguments when not supplied. https://github.com/rescript-lang/rescript-compiler/pull/6653
• Make pattern match suggestions to be easier to copy-paste. https://github.com/rescript-lang/rescript-compiler/pull/6656

💅 Polish

• No parens around tagged template literals. https://github.com/rescript-lang/rescript-compiler/pull/6639
• Allow identifier with modules in tagged template literals (e.g. Pg.sqlselect * from ${table} where id = ${id}). https://github.com/rescript-lang/rescript-compiler/pull/6645

🐛 Bug Fix

• Fix compiler crash when reexporting tagged template literal externals. https://github.com/rescript-lang/rescript-compiler/pull/6645

🚀 New Feature

• Add support for array spread. https://github.com/rescript-lang/rescript-compiler/pull/6608
• Support import attributes (https://github.com/tc39/proposal-import-attributes) in @module(). https://github.com/rescript-lang/rescript-compiler/pull/6599
• allow hyphens in jsx tag names (e.g. <mj-column>). https://github.com/rescript-lang/rescript-compiler/pull/6609

🐛 Bug Fix

• Fix issue with async and newtype in uncurried mode. https://github.com/rescript-lang/rescript-compiler/pull/6601
• Generic JSX transform: Rename expected module name for lowercase JSX to Elements from DOM. https://github.com/rescript-lang/rescript-compiler/pull/6606
• Generic JSX transform: Set default config params for jsxConfig. https://github.com/rescript-lang/rescript-compiler/pull/6606
• Generic JSX transform: Handle namespaced names. https://github.com/rescript-lang/rescript-compiler/pull/6606
• Fix issue with doc comment in recursive module. https://github.com/rescript-lang/rescript-compiler/pull/6613
• Fix issue with Exceptions and Extensible types runtime generation. https://github.com/rescript-lang/rescript-compiler/pull/6570

🚀 New Feature

• Experimental support of tagged template literals, e.g. sql`select * from ${table}. https://github.com/rescript-lang/rescript-compiler/pull/6250
• Experimental support for generic/custom JSX transforms. https://github.com/rescript-lang/rescript-compiler/pull/6565
• dict is now a builtin type. https://github.com/rescript-lang/rescript-compiler/pull/6590

🐛 Bug Fix

• GenType: distinguish inline records from unary variant cases of object type. https://github.com/rescript-lang/rescript-compiler/pull/6586

🐛 Bug Fix

• Renamed inline record fields: fix renamed field access in inline records. https://github.com/rescript-lang/rescript-compiler/pull/6551
• Fixed issue with coercions sometimes raising a Not_found instead of giving a proper error message. https://github.com/rescript-lang/rescript-compiler/pull/6574
• Fix issue with recursive modules and uncurried. https://github.com/rescript-lang/rescript-compiler/pull/6575

💅 Polish

• Improve error message for missing label(s) in function application. https://github.com/rescript-lang/rescript-compiler/pull/6576

ReScript's second major community-driven release is out and comes packed with new features and improvements! 🎉

🚀 Highlights

• Customizable Variants
• Enhanced Ergonomics for Record Types
• First-class Dynamic Import Support
• Uncurried Mode
• New Standard Library: ReScript Core

📋 More Information

• ReScript 11 Release Blog Post
• Changelog

🚀 New Feature

• GenType: support @deriving(accessors) outputs. https://github.com/rescript-lang/rescript-compiler/pull/6537
• Allow coercing ints and floats to unboxed variants that have a catch-all unboxed int or float case. https://github.com/rescript-lang/rescript-compiler/pull/6540
• Allow tuples in untagged variants. https://github.com/rescript-lang/rescript-compiler/pull/6550

🐛 Bug Fix

• GenType: now emits full suffix on JS import path to be compatible with .res.js. https://github.com/rescript-lang/rescript-compiler/pull/6541

💅 Polish

• Format docstrings. https://github.com/rescript-lang/rescript-compiler/pull/6417
• JSX v4: make automatic mode the default. https://github.com/rescript-lang/rescript-compiler/pull/6552

🚀 New Feature

• Add support for type coercion for invariant type arguments such as array payloads. https://github.com/rescript-lang/rescript-compiler/pull/6518
• Start treating rescript command the same as the rescript build command, so now you can do rescript -w. https://github.com/rescript-lang/rescript-compiler/pull/6524

🐛 Bug Fix

• Fix accidental removal of Belt.Result.Ok and Belt.Result.Error constructors in rc.5. https://github.com/rescript-lang/rescript-compiler/pull/6514
• Add missing check that the runtime representation of variants matches implementation and interface. https://github.com/rescript-lang/rescript-compiler/pull/6513/files
• GenType: only export types (not values) from module types. https://github.com/rescript-lang/rescript-compiler/pull/6516
• Fix compiler crash with unboxed variant definition with only 1 constructor. https://github.com/rescript-lang/rescript-compiler/pull/6523
• GenType: support mutual recursive types inside modules. https://github.com/rescript-lang/rescript-compiler/pull/6528
• Workaround for @as in labels in uncurried externals, which was broken. https://github.com/rescript-lang/rescript-compiler/pull/6527

💅 Polish

• GenType: make outputs DCE-friendly. https://github.com/rescript-lang/rescript-compiler/pull/6508

🚀 New Feature

• Allow empty inline records in variants. https://github.com/rescript-lang/rescript-compiler/pull/6494
• Allow empty record patterns in pattern matching. https://github.com/rescript-lang/rescript-compiler/pull/6494

🐛 Bug Fix

• Fix issue where an inline record with attributes did not parse. https://github.com/rescript-lang/rescript-compiler/pull/6499
• Fix issue with uncurried function with 1 arg being a variable where an undefined variable could be emitted. https://github.com/rescript-lang/rescript-compiler/pull/6507
• Fix runtime errors on @genType.as("alias") output. https://github.com/rescript-lang/rescript-compiler/pull/6509

🚀 New Feature

• Freely configurable suffix for generated .js files. https://github.com/rescript-lang/rescript-compiler/pull/6472

🐛 Bug Fix

• Fix issue with GenType and result introduced in rc.5. https://github.com/rescript-lang/rescript-compiler/pull/6464
• Fix compiler crash when inlining complex constants in pattern matching. https://github.com/rescript-lang/rescript-compiler/pull/6471
• Fix issue with generating async functions inside loops. https://github.com/rescript-lang/rescript-compiler/pull/6479
• Fix issue with Gentype and string annotations with numbers such as @as("0"). https://github.com/rescript-lang/rescript-compiler/pull/6487
• Fix error message on curried/uncurried signature mismatch. https://github.com/rescript-lang/rescript-compiler/pull/6414

💅 Polish

• Improve some error messages in rescript.conf parsing. https://github.com/rescript-lang/rescript-compiler/pull/6469