# swift-lang **Repository Path**: mirrors/swift-lang ## Basic Information - **Project Name**: swift-lang - **Description**: Swift 是苹果新推出的编程语言，专门针对 OS X 和 iOS 的应用开发。Swift 在各个方面优于 Objective-C，也不会有那么多复杂的符号和表达式。同时，Swift 更加快速、便利、高效、安全。除此之外，新的 Swift 语言依旧会与 Object-C 相兼容。 - **Primary Language**: Swift - **License**: Apache-2.0 - **Default Branch**: main - **Homepage**: None - **GVP Project**: No ## Statistics - **Stars**: 19 - **Forks**: 2 - **Created**: 2017-04-02 - **Last Updated**: 2025-02-06 ## Categories & Tags **Categories**: scripting-language **Tags**: None ## README Swift logo # Swift Programming Language | **OS** | **Status** | |---:|:---:| | macOS | [![macOS Universal Build Status](https://ci.swift.org/job/oss-swift-package-macos/lastCompletedBuild/badge/icon?subject=universal)](https://ci.swift.org/job/oss-swift-package-macos)| | Ubuntu 20.04 | [![Ubuntu 20.04 x86_64 Build Status](https://ci.swift.org/job/oss-swift-package-ubuntu-20_04/lastCompletedBuild/badge/icon?subject=x86_64)](https://ci.swift.org/job/oss-swift-package-ubuntu-20_04) [![Ubuntu 20.04 aarch64 Build Status](https://ci.swift.org/job/oss-swift-package-ubuntu-20_04-aarch64/lastCompletedBuild/badge/icon?subject=aarch64)](https://ci.swift.org/job/oss-swift-package-ubuntu-20_04-aarch64)| | Ubuntu 22.04 | [![Ubuntu 22.04 x86_64 Build Status](https://ci.swift.org/job/oss-swift-package-ubuntu-22_04/lastCompletedBuild/badge/icon?subject=x86_64)](https://ci.swift.org/job/oss-swift-package-ubuntu-22_04) [![Ubuntu 22.04 aarch64 Build Status](https://ci.swift.org/job/oss-swift-package-ubuntu-22_04-aarch64/lastCompletedBuild/badge/icon?subject=aarch64)](https://ci.swift.org/job/oss-swift-package-ubuntu-22_04-aarch64)| | Ubuntu 24.04 | [![Ubuntu 24.04 x86_64 Build Status](https://ci.swift.org/job/oss-swift-package-ubuntu-24_04/lastCompletedBuild/badge/icon?subject=x86_64)](https://ci.swift.org/job/oss-swift-package-ubuntu-24_04) [![Ubuntu 24.04 aarch64 Build Status](https://ci.swift.org/job/oss-swift-package-ubuntu-24_04-aarch64/lastCompletedBuild/badge/icon?subject=aarch64)](https://ci.swift.org/job/oss-swift-package-ubuntu-24_04-aarch64)| | Amazon Linux 2 | [![Amazon Linux 2 x86_64 Build Status](https://ci.swift.org/job/oss-swift-package-amazon-linux-2/lastCompletedBuild/badge/icon?subject=x86_64)](https://ci.swift.org/job/oss-swift-package-amazon-linux-2) [![Amazon Linux 2 aarch64 Build Status](https://ci.swift.org/job/oss-swift-package-amazon-linux-2-aarch64/lastCompletedBuild/badge/icon?subject=aarch64)](https://ci.swift.org/job/oss-swift-package-amazon-linux-2-aarch64)| | Debian 12 | [![Debian 12 x86_64 Build Status](https://ci.swift.org/job/oss-swift-package-debian-12/lastCompletedBuild/badge/icon?subject=x86_64)](https://ci.swift.org/job/oss-swift-package-debian-12) [![Debian 12 aarch64 Build Status](https://ci.swift.org/job/oss-swift-package-debian-12-aarch64/lastCompletedBuild/badge/icon?subject=aarch64)](https://ci.swift.org/job/oss-swift-package-debian-12-aarch64)| | Windows 10 | [![Windows 10 x86_64 Build Status](https://ci-external.swift.org/job/swift-main-windows-toolchain/lastCompletedBuild/badge/icon?subject=x86_64)](https://ci-external.swift.org/job/swift-main-windows-toolchain) [![Windows 10 arm64 Build Status](https://ci-external.swift.org/job/swift-main-windows-toolchain-arm64/lastCompletedBuild/badge/icon?subject=arm64)](https://ci-external.swift.org/job/swift-main-windows-toolchain-arm64)| | Universal Base Image 9 | [![Universal Base Image 9 x86_64 Build Status](https://ci.swift.org/job/oss-swift-package-ubi-9/lastCompletedBuild/badge/icon?subject=x86_64)](https://ci.swift.org/job/oss-swift-package-ubi-9)| |**Cross-Compilation Targets**|| | wasm32-unknown-wasi |[![wasm32-unknown-wasi Build Status](https://ci.swift.org/job/oss-swift-pr-test-crosscompile-wasm-ubuntu-20_04/lastCompletedBuild/badge/icon)](https://ci.swift.org/job/oss-swift-pr-test-crosscompile-wasm-ubuntu-20_04)| |**Community-Hosted CI Platforms**|| |[Android](https://github.com/swiftlang/swift-community-hosted-continuous-integration/blob/main/nodes/x86_64_ubuntu_24_04_android.json) | [![Android x86_64 Build Status](https://ci-external.swift.org/job/oss-swift-RA-linux-ubuntu-24.04-android-build/lastCompletedBuild/badge/icon?subject=x86_64)](https://ci-external.swift.org/job/oss-swift-RA-linux-ubuntu-24.04-android-build) [![Android aarch64 Build Status](https://ci-external.swift.org/job/oss-swift-RA-linux-ubuntu-24.04-android-arm64/lastCompletedBuild/badge/icon?subject=aarch64)](https://ci-external.swift.org/job/oss-swift-RA-linux-ubuntu-24.04-android-arm64)| ## Welcome to Swift Swift is a high-performance system programming language. It has a clean and modern syntax, offers seamless access to existing C and Objective-C code and frameworks, and is memory-safe by default. Although inspired by Objective-C and many other languages, Swift is not itself a C-derived language. As a complete and independent language, Swift packages core features like flow control, data structures, and functions, with high-level constructs like objects, protocols, closures, and generics. Swift embraces modules, eliminating the need for headers and the code duplication they entail. To learn more about the programming language, visit [swift.org](https://swift.org/documentation/). - [Contributing to Swift](#contributing-to-swift) - [Getting Started](#getting-started) - [Swift Toolchains](#swift-toolchains) - [Build Failures](#build-failures) - [Learning More](#learning-more) ## Contributing to Swift Contributions to Swift are welcomed and encouraged! Please see the [Contributing to Swift guide](https://swift.org/contributing/). Before submitting the pull request, please make sure you have [tested your changes](https://github.com/apple/swift/blob/main/docs/ContinuousIntegration.md) and that they follow the Swift project [guidelines for contributing code](https://swift.org/contributing/#contributing-code). To be a truly great community, [Swift.org](https://swift.org/) needs to welcome developers from all walks of life, with different backgrounds, and with a wide range of experience. A diverse and friendly community will have more great ideas, more unique perspectives, and produce more great code. We will work diligently to make the Swift community welcoming to everyone. To give clarity of what is expected of our members, Swift has adopted the code of conduct defined by the Contributor Covenant. This document is used across many open source communities, and we think it articulates our values well. For more, see the [Code of Conduct](https://swift.org/code-of-conduct/). ## Getting Started If you are interested in: - Contributing fixes and features to the compiler: See our [How to Submit Your First Pull Request guide](/docs/HowToGuides/FirstPullRequest.md). - Building the compiler as a one-off: See our [Getting Started guide][]. - Building a toolchain as a one-off: Follow the [Getting Started guide][] up until the "Building the project" section. After that, follow the instructions in the [Swift Toolchains](#swift-toolchains) section below. We also have an [FAQ](/docs/HowToGuides/FAQ.md) that answers common questions. [Getting Started guide]: /docs/HowToGuides/GettingStarted.md ### Swift Toolchains #### Building Swift toolchains are created using the script [build-toolchain](https://github.com/apple/swift/blob/main/utils/build-toolchain). This script is used by swift.org's CI to produce snapshots and can allow for one to locally reproduce such builds for development or distribution purposes. A typical invocation looks like the following: ```sh $ ./swift/utils/build-toolchain $BUNDLE_PREFIX ``` where ``$BUNDLE_PREFIX`` is a string that will be prepended to the build date to give the bundle identifier of the toolchain's ``Info.plist``. For instance, if ``$BUNDLE_PREFIX`` was ``com.example``, the toolchain produced will have the bundle identifier ``com.example.YYYYMMDD``. It will be created in the directory you run the script with a filename of the form: ``swift-LOCAL-YYYY-MM-DD-a-osx.tar.gz``. Beyond building the toolchain, ``build-toolchain`` also supports the following (non-exhaustive) set of useful options: - ``--dry-run``: Perform a dry run build. This is off by default. - ``--test``: Test the toolchain after it has been compiled. This is off by default. - ``--distcc``: Use distcc to speed up the build by distributing the C++ part of the swift build. This is off by default. - ``--sccache``: Use sccache to speed up subsequent builds of the compiler by caching more C++ build artifacts. This is off by default. More options may be added over time. Please pass ``--help`` to ``build-toolchain`` to see the full set of options. #### Installing into Xcode On macOS if one wants to install such a toolchain into Xcode: 1. Untar and copy the toolchain to one of `/Library/Developer/Toolchains/` or `~/Library/Developer/Toolchains/`. E.g.: ```sh $ sudo tar -xzf swift-LOCAL-YYYY-MM-DD-a-osx.tar.gz -C / $ tar -xzf swift-LOCAL-YYYY-MM-DD-a-osx.tar.gz -C ~/ ``` The script also generates an archive containing debug symbols which can be installed over the main archive allowing symbolication of any compiler crashes. ```sh $ sudo tar -xzf swift-LOCAL-YYYY-MM-DD-a-osx-symbols.tar.gz -C / $ tar -xzf swift-LOCAL-YYYY-MM-DD-a-osx-symbols.tar.gz -C ~/ ``` 2. Specify the local toolchain for Xcode's use via `Xcode->Toolchains`. ### Build Failures Try the suggestions in [Troubleshooting build issues](/docs/HowToGuides/GettingStarted.md#troubleshooting-build-issues). Make sure you are using the [correct release](/docs/HowToGuides/GettingStarted.md#installing-dependencies) of Xcode. If you have changed Xcode versions but still encounter errors that appear to be related to the Xcode version, try passing `--clean` to `build-script`. When a new version of Xcode is released, you can update your build without recompiling the entire project by passing `--reconfigure` to `build-script`. ## Learning More Be sure to look at the [documentation index](/docs/README.md) for a bird's eye view of the available documentation. In particular, the documents titled [Debugging the Swift Compiler](docs/DebuggingTheCompiler.md) and [Continuous Integration for Swift](docs/ContinuousIntegration.md) are very helpful to understand before submitting your first PR.