PureScript 0.7.5 发布，主要更新如下：
改进
Pretty printing of types and expressions in errors was improved (@paf31)
Externs files are now saved as JSON (@paf31)
Support for parallel builds has been added (@paf31)
Builds will now use multiple cores by default, but the number of capabilities can be modified by passing the -N option to the GHC runtime:
psc +RTS -N8
Binders can now be given type annotations (@5outh)
For example:
example = do n :: Int <- get put (n + 1)
This can be useful when disambiguating types.
There is a new warning for missing type signatures on top-level declarations (@paf31)
There are new warnings for shadowed and unused type variables (@garyb)
Contextual information in warnings was improved (@garyb)
The qualified keyword is now optional when importing modules qualified (@michaelficarra)
@zudov changed the behavior of PSCi on CTRL+C/D to match GHCi and other REPLs.
A bug in row unification was fixed (#1310, @paf31)
Constrained types can now be defined without a forall keyword. This is useful in some nullary type class and rank-N scenarios. (@paf31)
Bug 修复
@garyb added some additional checks for transitive module exports.
Type synonyms are now expanded more eagerly to avoid some error cases in the type checker (@paf31)
Better support for multi-byte UTF-8 characters (@senju)
A check has been added to the exhaustivity checker to avoid exponential blowup (@paf31)
Empty case statements are no longer syntactically valid (@zudov)
其它
@aspidites fixed all compiler warnings in the core libraries.
@zudov and @phadej have made improvements to the Stack distribution of the compiler, and the Stackage builds.
@garyb has added a warning for operators in type classes, since they will be disallowed before 0.8.
PureScript 是个小巧而强大的静态类型语言，可以编译成 JavaScript。purescript 主要是由 Haskell 和 PureScript 编写的。
下载地址：https://github.com/purescript/purescript/releases/tag/v0.7.5
来自:开源中国社区
