Hacktoberfest 2026：维护者为十月标记出来的 issue，仍然开放、适合新手。 浏览 Hacktoberfest issue

Add more C# language features and syntax sugar to highlightning

未关闭
  • 哪里不对？
#239 1 条评论 0 个 reaction 已指派 0 人 在 GitHub 查看

还没有人认领这个 Issue。

评估

难度
5/5
预计耗时
一周以上
新手友好度
35/100
Issue 类型
功能
描述清晰度
基本清楚
活跃度
停滞
技术栈
csharp
领域
tooling

调研方向

阅读链接的 github/linguist issue 5838，并将列出的 C# 功能与当前语法行为进行比较。使用提供的示例（包括 extension-method resolving）作为验收用例；当所请求的语法能够正确高亮时，即视为完成。

由索引模型根据 Issue 内容生成。

描述

See https://github.com/github/linguist/issues/5838

Describe the enhancement

Currently not all syntax features of C# are highlighted.
My suggestion includes the following (if you would find something missing, feel free to add):

Missing features

For the sake of completeness, I have tried to explicitly assign a feature to a language version here. I could not find the associated standard/proposal for each feature but they do exist.

Standard (Draft v6)

C# language standard - ECMA-TC49-TG2

Unsafe blocks (ECMA Draftv6 22.2)

public void Method() {
    unsafe {
        // Unsafe operations
    }
}

Pointers & pointer fixture (ECMA Draftv6 22.7)

public unsafe void Method() {
    fixed(int* ptr = &refVar) {
        // Some cool pointer operations
    }
}
C# 9

Native Integer Primitives (CSharp 9.0 Proposal)

public void Method() {
    nint myNativeInteger = -123;
    nuint myNativeUnsignedInteger = 123;
}
public void Method(nint param1, nuint param2) {}

Function pointers (CSharp 9.0 Proposal)

public void Method() {
    delegate* managed<int, int>;
    delegate* unmanaged<int, int>;
    delegate* unmanaged[Cdecl] <int, int>;
    delegate* unmanaged[Stdcall, SuppressGCTransition] <int, int>;
}

Static anonymous functions (CSharp 9.0 Proposal)

public void X() {
    Y(static (i) => i + 1);
    Y(static i => i + 1);
}

public void Y(Func<int, int> x) {}

With expressions (CSharp 9.0 Proposal)

public record MyRecord(string Name);
public MyRecord ModifyName(MyRecord rec) {
    return rec with { Name = "My new name" };
}
C# 10

Global Using Directives (CSharp 10.0 Proposal)

global using System;
global using System.Linq;
global using System.Runtime.CompilerServices;

Records (CSharp 10.0 Proposal)

public partial record struct Record {}
public partial sealed record Record {}
public record struct Record {}
public sealed record Record {}

Enhanced Pattern Matching (CSharp 9.0 Proposal + CSharp 10.0 Proposal)

void M(object o1, object o2)
{
    var t = (o1, o2);
    if (t is (int, string)) {} 
    switch (o1) {
        case int: break; 
        case string: break; 
    }
}

bool IsLetter(char c) => c is (>= 'a' and <= 'z') or (>= 'A' and <= 'Z');

Null checks

public void Method(object? nullable) {
    if(nullable is null) {}
    if(nullable is not null) {}
}

Defaults

public void X() {
    int x = default;
}

implicit new

public void Method() {
    MyKnownType value = new();
}

Wrong implemented features

Extension method resolving

namespace N1
{
    public static class D
    {
        public static void F(this int i) => Console.WriteLine($"D.F({i})");
    }
}

namespace N2
{
    using N1;

    class Test
    {
        static void Main(string[] args)
        {
            1.F();
            // ^^ Why is this red?
        }
    }
}
主要语言
TypeScript
星标
78
派生
43
30 天内没有已合并 PR

环境准备

在 Codespaces 中打开

在浏览器里用你自己的 GitHub 账号启动这个项目的开发容器。

  • 没有 Dockerfile 或 Docker Compose 文件
  • 没有 Pull Request 模板
  • 没有贡献指南

从这里开始

  1. 先读完整个 Issue，再读项目的贡献指南。
  2. 在 Issue 下留言说明你要接手 —— 这能避免两个人做同样的事。
  3. Fork 仓库，在一个分支上完成修改。
  4. 提交 Pull Request，并在描述里引用这个 Issue 编号。

dotnet/csharp-tmLanguage 的其他 Issue

查看 dotnet/csharp-tmLanguage 的全部 Issue

相似的 Issue

更多 TypeScript Issue

把新 issue 发到你的邮箱

精选适合新手参与的 GitHub issue 摘要。