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Releases: purescript/purescript

v0.5.5

02 Sep 21:34
@paf31 paf31
v0.5.5
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v0.5.5 
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v0.5.4

04 Aug 00:01
@paf31 paf31
v0.5.4
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v0.5.4

This incremental release is provided to provide bug fixes and features required to compile the latest core libraries.

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v0.5.0 - "Polymorph"

27 Apr 19:16
@paf31 paf31
v0.5.0
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v0.5.0 - "Polymorph"

Breaking Changes

  • Support for blocks has been removed. (paf31)

  • Type class instances must now be named (paf31)

    instance showNumber :: Show Number where
  ...

  • Prelude modules now follow a naming scheme similar to haskell (e.g. Data.Maybe, Control.Monad) (garyb)

  • Many modules that were previously part of the Prelude have been split into individual libraries, now distributed via Bower (garyb)

  • Multiple modules with the same name are now disallowed rather than merged (garyb)

  • The Prelude module is now imported automatically. Conflicts can be avoided by using qualified imports or an explicit import list. (garyb, paf31)

  • Overlapping instances are no longer allowed. The Prelude and core libraries have been updated accordingly. (paf31)

  • Functor, Applicative, Monad are now part of a class heirarchy that include Apply and Bind. return is now an alias for pure. (joneshf, paf31, garyb)

  • Semigroupoid is now a superclass of Category (garyb)

  • (:) is now part of Prelude (garyb)

  • (!!) has been renamed to Prelude.Unsafe.unsafeIndex and a safe version has been added to Data.Array (garyb)

New Features

  • Multi parameter typeclasses (paf31)
  • Superclasses (puffnfresh, paf31)
  • FlexibleInstances and FlexibleContexts (paf31)
  • Let bindings are now supported. The let keyword can introduce several local (possibly mutually recursive) bindings, along with optional type signatures. (paf31)
  • where clauses are now supported in value declarations, with the same rules as let bindings (garyb)
  • Empty data declarations and empty type classes are now supported (paf31)
  • A new command line option --codegen controls which modules will have Javascript and externs generated (paf31)
  • psc-make now generates CommonJS-compatible modules, which can be used with require() in node. psc still generates modules for use in the browser. (paf31, garyb)

Enhancements

  • Pretty printing for row types was improved (garyb)
  • Module names can now contain . (garyb)
  • New optimizer rules have been added for code in the ST monad, to reproduce the functionality of the blocks feature, which has been removed (paf31)
  • Pattern binders are now usable in lambda expression arguments (paf31)
  • PSCI now has a :t command for checking the type of a value (paf31)
  • Array pretty printing via show has been improved (joneshf)
  • PSCI completions are sorted (joneshf)
  • PSCI now has help commands (joneshf)
  • PSCI history is in XDG config (joneshf)
  • PSCI allows loading of modules from ~ paths (joneshf)
  • PSCI can accept a list of modules to load on start from the command line (paf31)
  • PSCI can now be configured using a .psci file in the current directory. If such a file exists, it should contain a list of commands to run on startup. (paf31)
  • Type class instances are now named, to enable easier interop with Javascript (paf31)
  • Class names no longer need to be qualified in instance declarations (garyb)
  • Module exports can now be specified explicitly (garyb)
  • Let bindings can now define functions with binders (paf31)
  • Case statements and functions which do not pattern match on their arguments now generate smaller code (paf31)
  • Imported type class instances are now exported (paf31)
  • Some error messages were improved (paf31)
  • Qualfied module imports are now supported as import qualified M as X (garyb)
  • The escape check was removed, since it was too restrictive (paf31)
  • The binary operator reordering step was greatly simplified (paf31)
  • The Object type constructor can now be referenced explicitly as Prim.Object (with kind # * -> *) (paf31)
  • Optimizations are now enabled by default and can be disabled with the --no-tco and --no-magic-do flags (garyb)
  • Unary minus and signed numeric literals are now supported again (paf31, garyb)
  • Type errors have been simplified, the full trace can be enabled with --verbose-errors or -v (paf31)
  • Error messages now display source positions (paf31, garyb)
  • The type classes implementation and code generation was greatly simplified (paf31)
  • Object properties and row labels can now be accessed with arbitrary string names by using string literals (paf31)
  • (++) is now an alias for the Semigroup operator (<>) (paf31)
  • Error messages for classes with undefined or missing members have been improved (garyb)
  • The SYB dependency was removed, and traversals rewritten by hand, for a large performance increase (paf31)

Bug Fixes

  • The subsumes relation has been fixed for object types (paf31)
  • sort no longer mutates arrays (joneshf)
  • PSCI now evaluates expressions (joneshf)
  • Overlapping variables in typeclass instances are rejected (paf31)
  • A bug in the optimizer related to inlining was fixed (paf31)
  • A type checker bug related to array literals was fixed (paf31)
  • Externs files (--externs) are now working again (paf31)
  • Precedence of backticked infix functions have been corrected (paf31)
  • A bug which allowed some incorrect type class instances to pass the type checker was fixed (paf31)
  • Type synonyms are no longer restricted to kind * (paf31)
  • Negative number literals have been restored (garyb)
  • If a type defined in a module appears in an exported declaration it must also be exported from the module (garyb)
  • Error messages for unresolvable types or values include the declaration name again (garyb)
  • Characters in string literals are now properly escaped (garyb)
  • A module containing a single orphan type declaration and no other declarations now fails to compile (garyb)
  • An error involving ordering of type class instances was fixed (garyb, paf31)
  • Externs files no longer include fixity declarations for members that were removed as dead code (garyb)
  • A bug which prevented sequence $ [Just 1] from typechecking was fixed (paf31)

Libraries

Plugins

  • The grunt-purescript plugin has been updated to provide support for new command line options.
  • There is a new gulp-purescript plugin available for compiling with Gulp.

Documentation

  • There is a new hierarchy executable which will generate .dot diagrams based on the type class hierarchy of a module. The Prelude docs have been updated to include such a type class diagram. (joneshf)
Assets 2