PureScript 0.7.0 "MELTDOWN" 发布

jopen 9年前

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。

PureScript 0.7.0 ("MELTDOWN") 发布，主要是按照计划进行改进，在 1.0 之前简化升级路径。此最新的核心库已经更新编译到这个版本。旧版本的核心库已经不适用于这个版本，而且最新的库也不能使用旧的编译版本构建。

详细升级和迁移指导请看 wiki。

重要改进

  • psc 可执行已经使用 psc-make 替代，重命名为 psc (为了遵循 CommonJS 模块输出标准)

  • Int 和 Number 常量

  • Prelude 模块不再自动导入，必须以跟其他模块一样的方式导入

  • 编译器不再包括模块，模块已经拆分到以下这些库：

  • 数组类型的 [] 语法已经被移除，但是还是可以使用 [] 数组常量

    • [] should now be written as Array, and [a] as Array a.

  • Cons patterns for arrays have been removed.

  • Declaring operators in classes will now produce a warning. Changes will be coming to operators in PureScript 0.8, and moving to named members in classes with operators as aliases (e.g. (<$>) = map) should make the transition easier in the future.

  • JavaScript for the FFI can no longer be provided inline.

    • Values must instead be provided in a separate .js file, and passed to the compiler with the -ffi flag.

    • Values should be provided in the form exports.foo = ..., similar to a CommonJS module

    • The file should have a comment // module X.Y.Z where X.Y.Z is the name of the module the JS values are for.

    • See here for an example

    </ul>

    功能增强

    • Module exports (@andyarvanitis). Currently, only full module exports are supported, but imported modules can be re-exported using the following syntax:purescript module M1 (module M2) where import M2

    • Documentation improvements (@hdgarrood):

      • psc-docs can now generate multiple output files, allowing documentation to be collected into functional groups.

      • A new tool psc-publish has been added, which generates module documentation in a JSON format required by Pursuit 2 (coming soon)

    • @puffnfresh has worked on dramatically increasing the performance of incremental builds, with improvements up to 10x compared to the previous release.

    • The new --require-path option allows the syntax of module imports in generated CommonJS modules to be customized (@garyb).

    • @etrepum has added support for building with Stack.

    • PSCi now supports computations in the Eff monad. (@paf31)

    • The compiler now emits warnings in the following cases:

    • @balajirrao has improved the appearance of unknown and rigid types appearing in error messages.

    • @puffnfresh has added position information to pattern match errors.

    • @puffnfresh has added some new optimizations (inlining <<< and $)

      • </ul>

      Bug 修复

      • psc, psc-docs and psc-bundle now support file globs as command-line arguments, fixing a bug related to the command length on Windows machines (@paf31)

      • @wuzzeb has fixed some issues in the pretty printer.

      • @mjgpy3 has improved error messages related to incorrect pattern matches on data constructors.

      工具

      • Pulp has been updated:

        • The new psc and psc-bundle binaries are supported

        • FFI modules are now identified and compiled based on a convention

        • pulp docs now generates individual Markdown files for each source module

      • gulp-purescript has been updated:

        • The new psc and psc-bundle binaries are supported

        • FFI modules are now supported

        </ul>

        库

        • The following libraries have been moved into the core library set:

          • purescript-lists - Strict and lazy linked list data structures

          • purescript-assert - Low level assertion library for tests

          • purescript-parallel - An applicative functor for parallel composition of asynchronous computations.

          • purescript-arrows - Arrow type classes and standard instances.

          • purescript-tailrec - A type class for stack-safe monadic tail recursion.

        • The requirements for libraries in the purescript-contrib organization have been tightened, to try to ensure that libraries stay maintained.

          • </ul>

          更多改进请看发行说明，下载：