base-compiler

# compiler This is the repository of the [Clean][] compiler. This is a delayed mirror of the [upstream][] version and is only used to publish the package. Periodically changes from upstream are released in a new version here. See the documentation in [base][] and the notes on [updating](/CONTRIBUTING.md#updating) if you intend to make a merge request for this repository. ## Packages In this repository the sources of three packages are kept: - [`base-compiler`][base-compiler], which contains the compiler executable. This package should not be included directly, but through [`base`][base]. - [`lib-compiler`][lib-compiler]. This is a library with which you can use modules from the Clean compiler. The versions of these packages are kept in sync. This means that `lib-compiler` patch versions may not be backwards compatible. Normally you will want to use this dependency with an exact version constraint, e.g. `=1.0.0`. `base-compiler-itasks` and `lib-compiler-itasks` are old packages with a special version of the compiler with extensions for iTasks. All extensions were merged into `base-compiler` in June 2022. See [CONTRIBUTING.md](CONTRIBUTING.md) for instructions on updating this repository. ## Using the library The Clean frontend of the compiler in `lib-compiler` can be used as any other library. On Windows systems, if an application uses not only the compiler frontend but also the backend, it should copy `misc/dll/backend.dll` to the directory of the executable. On Unix systems, object code from the C backend is linked automatically if needed. ## Maintainer & license This project is maintained by [Camil Staps][]. The upstream is maintained by John van Groningen. For license details, see the [LICENSE](/LICENSE) file. [base]: https://clean-lang.org/pkg/base/ [base-compiler]: https://clean-lang.org/pkg/base-compiler/ [Camil Staps]: https://camilstaps.nl [Clean]: https://clean-lang.org/ [itasks]: https://gitlab.com/clean-and-itasks/base/compiler/-/tree/itasks [lib-compiler]: https://clean-lang.org/pkg/lib-compiler/ [main]: https://gitlab.com/clean-and-itasks/base/compiler/-/tree/main [upstream]: https://gitlab.com/clean-compiler-and-rts/compiler

# Changelog ### v3.2.0 - Feature: add flag `-oltr` to enable lazy tuple recursion optimisation. - Enhancement: improve code generation for a constructor and (unevaluated) record update in a lazy context for constructors with a single unboxed record argument. - Enhancement: improve generated code for a record update in a lazy context that updates (a) field(s) with a basic type constant. - Enhancement: optimisation, thunk lift record updates in a lazy context updating (a) strict field(s) with function call(s) expressions in a lazy context; if the original record was unboxed pass this partial (not updated part) record unboxed. - Enhancement: optimisation, thunk lift record expressions in a lazy context with (a) strict field value(s) which are function call(s) in a lazy context. - Enhancement: optimisation, extend thunk lifting of record updates in a lazy context updating (a) strict field(s). - Fix: prevent compile time error for a newtype of a higher kinded type variable application. - Fix: prevent compiler crash when parsing a record update that specifies the record and has a selector that also specifies the record and one or both records are qualified with a module name. - Fix: fix signs and propagation of arguments of mutually recursive type definitions: convert type argument numbers to group variable numbers. - Fix: don't allow fields without values in expressions, only in patterns, for example not `{R | x}` as shorthand for `{R | x=x}`. - Fix: if a field is qualified and only imported by a qualified import of the whole module it was necessary to also explicitly import this field (and record). This is no longer necessary if the record is also specified, for example: `r.'m'.R.'m'.f`, `r.R.'m'.f`, `{R | r & 'm'.f=0}`, or `{R | 'm'.f=0}`. - Fix: parsing without the layout rule; previous version could sometimes require extra brackets. #### v3.1.1 - Fix: fix type checking of updates of arrays of unique coercible elements. - Fix: reject `case` expressions without alternatives in parser. - Fix: fix sign classification of type parameters after the first of type definitions. - Misc: delay expanding newtypes in the type checker. ### v3.1.0 - Enhancement: allow patterns after qualified constructors in `=:` expressions without parentheses (e.g. `a=:'M'.C 0`); already allowed for constructors in the global namespace. - Enhancement: optimize calls to generic functions with an implementation exported in a definition module by creating a local copy (except for generic representation types, e.g. `PAIR`). - Enhancement: add unfolding of functions yielding a character, integer or real constant in (trivial) fusion. - Fix: fix bug in generic fusion for active trivial boolean cases on a case path with a function argument. - Fix: report an error for tuples with more than 32 elements. - Fix: improve checking of required imports of module StdStrictLists. - Fix: prevent compiler crash when compiling macros such as `.` imported from a definition module. - Fix: disallow unique attributes that propagate to the root in CAF types. - Fix: fix parsing of qualified non-alphanumeric identifiers with a module name of length 1 (e.g. `'L'. ++`). - Fix: fix parsing of record patterns without definitions; don't allow definitions. - Fix: fix compiler crash for match functions generated for irrefutable unboxed list patterns when the elements are not in a strict context. - Fix: fix reporting of uniqueness type coercion errors. #### v3.0.3 - Fix: substitute type variables and attributes when expanding a newtype with a universal quantifier. - Fix: fix replacement of an explicit case by a case alternative with a strict let. - Fix: fix bug that prevented unboxing arguments of some closures. #### v3.0.2 - Enhancement: add optimisation to generic fusion to prevent generating some small functions with many arguments that may cause fusion to stop because of the 32 arguments limit. Instead generate larger functions with fewer arguments by inlining function calls. - Enhancement: speed up and reduce memory usage of compilation with generic fusion. Instead of generating a new trivial function and inlining the function later do this immediately (without generating a new function) in some cases. - Fix: the Windows version of `lib-compiler` now distributes `backend.dll` in `misc/dll/backend.dll` instead of `exe/backend.dll` to avoid a name clash with `base-compiler`. #### v3.0.1 - Fix: prevent compiler crash when explicitly importing a macro using a new type pattern match. ## v3.0 - Feature: add `{ :}`, `{! :}`, `{# :}`, and `{32# :}` array types which reserve up to the next power of 2 of memory. This uses the ABC instructions `create_arrayp2` and `create_arrayp2_`. - Feature: add functional dependencies (backported from the iTasks compiler). - Feature: add `import qualified .. as ..` (backported from the iTasks compiler). - Feature: add `binumap` (backported from the iTasks compiler). - Fix: fix printing of higher-order array types. - Fix: prevent stack overflow when compiling very large function types. #### v2.0.1 - Chore: allow `base-stdenv` ^2.0. ## v2.0 - Enhancement: use ABC instructions `select_nc` and `update_nc` for array updates and selects when indexes do not need to be checked (e.g. in array comprehensions). - Enhancement: add names of comprehensions to generated identifiers in patterns. - Fix: bug in generic fusion causing incorrect functions to be generated. ## v1.0 First tagged version.