Fable Versions Save

Changed

Python

• Use Any type for all non-repeated generic arguments (by @dbrattli)
• Don't generate unnecessary type type-vars if generic type is replaced by Any (by @dbrattli)
• Generate new style _T | None instead of Optional[_T] (by @dbrattli)

Rust

• Support multiple namespaces sharing a prefix in the same file (by @ncave)
• Support imports with the same namespace across multiple files (by @ncave)

Fixed

JavaScript

• Fix #3571: [<AttachMembers>] not compatible with f# member this.Item (by @ncave)

Changed

All

• Fix #3567: Turn off FCS warning 3560 by default (by @vzarytovskii)

Fixed

Rust

• Fixed recursive lambda captured idents cloning (by @ncave)

Changed

All

• Updated FCS to bd66d54b1ac4dd0f252c0a37196c2ccd54628356 (by @ncave)

JavaScript

• Support (un)curry up to 20 arguments (by @MangelMaxime)

Python

• Remove support for Python 3.9. Add GH testing for Python 3.12 (by @dbrattli)
• Support (un)curry up to 20 arguments (by @MangelMaxime)

Dart

• Support (un)curry up to 20 arguments (by @MangelMaxime)

Added

Python

• Added Async.StartChild (by @dbrattli)
• Fix #3482: Revert removal of Py.python and Py.expr_python (by @dbrattli)

Changed

JavaScript

• Improve error messages for Decimal.Parse, Double.Parse, Int32.Parse, Long.Parse (by @ncave)

Rust

• Improve error messages for BigInt.Parse, DateOnly.Parse, DateTime.Parse, DateTimeOffset.Parse, Decimal.Parse, TimeOnly.Parse (by @ncave)

Python

• Improve error messages for Double.Parse, Int32.Parse, Long.Parse (by @ncave)
• Refactored async trampoline leveraging asyncio mainloop. (by @dbrattli)

Fixed

JavaScript

• Fix #3541: Interface imported in generated javascript when DU has an interface type constraint (by @ncave)

Python

• Fixed Async.Parallel (by @dbrattli)

Fixed

• [Python] Fix #3527: Fix error name '...' is not defined (by @dbrattli)
• [Python] Fix #3496: Python target is confused with class taking a length: int argument (by @dbrattli)

• Fix package to include Fable libraries folders

• Fix #3480: Function decorated with [<NamedParams>] without arguments provided should take an empty object

• Fix #3494: Calling an attached parametrized getter fails in transpiled javascript

• Remove fable-py support

• Fix #3461: Don't default to javascript if the language requested by the user is unknown (help detect typo)

• Improve --help message for the --lang section

• Fix #3464: Invalidate cache when the target language changes

• Always delete the fable_modules folder when the cache is invalidated

• Remove --typescript options support, use --lang <target> instead

• Fix #3441: Don't ignore error when loading plugin

• Fix #3482: Remove Py.python and Py.expr_python use emitPyStatement and emitPyExpr instead

• Restrict replacements to accept only functions from their target language module

• Fix #3528: Consider functions hidden by a signature file as private (@nojaf)

• Improve error message when Fable doesn't find the fable-library folder.

  This is especially useful when working on Fable itself, and should save time to others. Each time I got this is error, I needed several minutes to remember the cause of it.

• Fix #3438: Source maps
• Fix #3440: Don't curry arity-1 functions
• Fix #3452: DateTimeOffset conversion to DateTime
• Fix regression: Don't type test interfaces declared in F# code
• Rust: Added no_std test build
• Rust: Added regex support
• Rust: Fixed no_std support
• Rust: Fixed uncurried options
• Rust: Enabled some applicative tests
• Rust: Enabled some tests
• Rust: Updated switch transform (#3449)
• Rust: Updated dependencies (#3447)
• Rust: Fixed interface properties (#3445)
• Rust: Updated object equality (#3444)
• Rust: Enabled some Comparison tests (#3442)
• Rust: Added DateOnly, TimeOnly tests
• Rust: Added DateTimeOffset tests
• Rust: Updated TimeSpan
• Rust: Added DateTimeOffset

• Fix typo in error message when using Fable 3 from .NET 7 @MangelMaxime

• Fix #3441: Don't ignore error when loading plugin @MangelMaxime
• PR #3448: Prevent Fable 3 to hang if called from .NET 7 @MangelMaxime
• Move Fable 3 to .NET 6 @MangelMaxime