scala源码-2.11.x.zip

# Welcome! This is the official repository for the [Scala Programming Language](http://www.scala-lang.org). # How to contribute To contribute to the Scala Standard Library, Scala Compiler and Scala Language Specification, please send us a [pull request](https://help.github.com/articles/using-pull-requests/#fork--pull) from your fork of this repository! We do have to ask you to sign the [Scala CLA](http://www.lightbend.com/contribute/cla/scala) before we can merge any of your work into our code base, to protect its open source nature. For more information on building and developing the core of Scala, make sure to read the rest of this README! In order to get in touch with Scala contributors, join the [scala/contributors](https://gitter.im/scala/contributors) gitter channel or post on the [scala-internals mailing list](http://www.scala-lang.org/community/). # Reporting issues Please report bugs at the [scala/bug issue tracker](https://github.com/scala/bug/issues). We use the [scala/scala-dev tracker](https://github.com/scala/scala-dev/issues) for coordinating bigger work items. # Get in touch! If you need some help with your PR at any time, please feel free to @-mention anyone from the list below, and we will do our best to help you out: | | username | talk to me about... | --------------------------------------------------------------------------------------------------|----------------------------------------------------------------|---------------------------------------------------| <img src="https://avatars.githubusercontent.com/adriaanm" height="50px" title="Adriaan Moors"/> | [`@adriaanm`](https://github.com/adriaanm) | type checker, pattern matcher, infrastructure, language spec | <img src="https://avatars.githubusercontent.com/SethTisue" height="50px" title="Seth Tisue"/> | [`@SethTisue`](https://github.com/SethTisue) | build, developer docs, community build, Jenkins, library, the welcome-to-Scala experience | <img src="https://avatars.githubusercontent.com/retronym" height="50px" title="Jason Zaugg"/> | [`@retronym`](https://github.com/retronym) | compiler performance, weird compiler bugs, Java 8 lambdas, REPL | <img src="https://avatars.githubusercontent.com/Ichoran" height="50px" title="Rex Kerr"/> | [`@Ichoran`](https://github.com/Ichoran) | collections library, performance | <img src="https://avatars.githubusercontent.com/lrytz" height="50px" title="Lukas Rytz"/> | [`@lrytz`](https://github.com/lrytz) | optimizer, named & default arguments | <img src="https://avatars.githubusercontent.com/VladUreche" height="50px" title="Vlad Ureche"/> | [`@VladUreche`](https://github.com/VladUreche) | specialization, Scaladoc tool | <img src="https://avatars.githubusercontent.com/densh" height="50px" title="Denys Shabalin"/> | [`@densh`](https://github.com/densh) | quasiquotes, parser, string interpolators, macros in standard library | <img src="https://avatars.githubusercontent.com/xeno-by" height="50px" title="Eugene Burmako"/> | [`@xeno-by`](https://github.com/xeno-by) | macros and reflection | <img src="https://avatars.githubusercontent.com/heathermiller" height="50px" title="Heather Miller"/> | [`@heathermiller`](https://github.com/heathermiller) | documentation | <img src="https://avatars.githubusercontent.com/dickwall" height="50px" title="Dick Wall"/> | [`@dickwall`](https://github.com/dickwall) | process & community, documentation | <img src="https://avatars.githubusercontent.com/dragos" height="50px" title="Iulian Dragos"/> | [`@dragos`](https://github.com/dragos) | specialization, back end | <img src="https://avatars.githubusercontent.com/axel22" height="50px" title="Aleksandr Prokopec"/> | [`@axel22`](https://github.com/axel22) | collections, concurrency, specialization | <img src="https://avatars.githubusercontent.com/janekdb" height="50px" title="Janek Bogucki"/> | [`@janekdb`](https://github.com/janekdb) | documentation | P.S.: If you have some spare time to help out around here, we would be delighted to add your name to this list! # Repository structure ``` scala/ +--build.sbt The main sbt build script +--build.xml The deprecated Ant build script +--pull-binary-libs.sh Pulls binary artifacts from remote repository, used by build scripts +--lib/ Pre-compiled libraries for the build +--src/ All sources +---/library Scala Standard Library +---/reflect Scala Reflection +---/compiler Scala Compiler +---/eclipse Eclipse project files +---/intellij IntelliJ project templates +--spec/ The Scala language specification +--scripts/ Scripts for the CI jobs (including building releases) +--test/ The Scala test suite +---/files Partest tests +---/junit JUnit tests +--build/ [Generated] Build output directory ``` # Get Ready to Contribute ## Requirements You need the following tools: - A Java SDK. The baseline version is 6 for 2.11.x, 8 for 2.12.x. It's possible to use a later SDK for local development, but the CI will verify against the baseline version. - sbt, we recommend the [sbt-extras](https://github.com/paulp/sbt-extras) runner script. It provides sensible default jvm options (stack and heap size). - curl (for `./pull-binary-libs.sh`, used by the sbt / ant build). - Apache Ant (version 1.9.x, minimum 1.9.3; Ant 1.10+ doesn't work on Java 6) if you are using the ant build. Mac OS X and Linux work. Windows may work if you use Cygwin. Community help with keeping the build working on Windows is appreciated. ## Build Setup ### Basics Scala is built in layers, where each layer is a complete Scala compiler and library. Here is a short description of the layers, from bottom to top: - `starr`: the stable reference Scala release. We use an official release of Scala (specified by `starr.version` in [versions.properties](versions.properties)), downloaded from the Central Repository. - `locker` (deprecated, only in ant): an intermediate layer that existed in the ant build to perform a bootstrap. - `quick`: the development layer which is incrementally built when working on changes in the compiler or library. - `strap` (deprecated, only in ant) : a test layer used to check stability of the build. The sbt build uses `starr` to build `quick`. This is sufficient for most development scenarios: changes to the library or the compiler can be tested by running the `quick` Scala (see below for how to do that). However, a full build of Scala (a *bootstrap*, as performed by our CI) requires two layers. This guarantees that every Scala version can build itself. If you change the code generation part of the Scala compiler, your changes will only reflect in the bytecode of the library and compiler after a bootstrap. See below for how to create a bootstrap build locally. ### Using the Sbt Build Core commands: - `compile` compiles all sub-projects (library, reflect, compiler, scaladoc, etc) - `scala` / `scalac` run the REPL / compiler directly from sbt (accept options / arguments) - `dist/mkBin` generates runner scripts (`scala`, `scalac`, etc) in `build/quick/bin` - `dist/mkPack` creates a build in the Scala distribution format in `build/pack` - `test` runs the JUnit test, `testOnly *immutable.ListTest` runs a