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。
v0.10.0-rc.1 更新内容如下:
主要变化:
The new functional dependencies feature fixes type inference in some cases involving multi-parameter type classes. However, due to a bug in the compiler, some of those expressions were previously type checking where they should not have. As a result, it is necessary to add functional dependencies to some classes in order to make previous code type-check in some cases. Known examples are:
MonadEff
andMonadAff
MonadState
,MonadReader
, and the rest of the MTL-style classes intransformers
These libraries will be updated before the final release of 0.10.*, but you might experience some issues in the meantime.
新功能:
Data.Newtype
Deriving
It is now possible to derive the Newtype
class for any data declaration which is a newtype
, using the existing deriving instance
syntax:
newtype Test = Test String derive instance newtypeTest :: Newtype Test _
Note that the second type argument should be specified as a wildcard, and will be inferred.
完整版更新内容请查看:https://github.com/purescript/purescript/releases
下载地址: