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https://github.com/GeWuYou/GFramework.git
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f3c5840ebe
- 添加 CommonDiagnostics 类提供通用诊断描述符 - 将诊断相关文件从 logging 目录移动到 diagnostics 目录 - 更新命名空间从 GFramework.SourceGenerators.Common.diagnostics 到 GFramework.SourceGenerators.diagnostics - 修改诊断ID从 GFC001 到 GF_Common_Class_001 - 移除 GFramework.SourceGenerators.Common 项目引用 - 更新 AnalyzerReleases.Unshipped.md 文件中的诊断规则 - 重构 README.md 文件提供完整的项目介绍和使用指南
123 lines
3.9 KiB
C#
123 lines
3.9 KiB
C#
using System.Linq;
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using System.Text;
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using GFramework.SourceGenerators.diagnostics;
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using Microsoft.CodeAnalysis;
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using Microsoft.CodeAnalysis.CSharp;
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using Microsoft.CodeAnalysis.CSharp.Syntax;
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namespace GFramework.SourceGenerators.rule;
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[Generator]
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public sealed class ContextAwareGenerator : IIncrementalGenerator
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{
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private const string AttributeMetadataName =
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"GFramework.SourceGenerators.Abstractions.rule.ContextAwareAttribute";
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public void Initialize(IncrementalGeneratorInitializationContext context)
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{
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// 1️⃣ 查找候选类
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var candidates = context.SyntaxProvider
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.CreateSyntaxProvider(
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predicate: static (node, _) => node is ClassDeclarationSyntax,
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transform: static (ctx, _) => GetCandidate(ctx)
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)
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.Where(static s => s is not null);
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// 2️⃣ 注册生成输出
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context.RegisterSourceOutput(candidates, static (spc, symbol) =>
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{
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if (symbol != null)
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GenerateOutput(spc, symbol);
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});
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}
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#region 候选类查找
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private static INamedTypeSymbol? GetCandidate(GeneratorSyntaxContext context)
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{
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if (context.SemanticModel.GetDeclaredSymbol(context.Node) is not INamedTypeSymbol symbol)
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return null;
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// 仅筛选带有 ContextAwareAttribute 的类
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var hasAttr = symbol.GetAttributes()
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.Any(attr => attr.AttributeClass?.ToDisplayString() == AttributeMetadataName);
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return hasAttr ? symbol : null;
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}
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#endregion
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#region 输出生成 + 诊断
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private static void GenerateOutput(SourceProductionContext context, INamedTypeSymbol symbol)
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{
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var syntax = symbol.DeclaringSyntaxReferences.FirstOrDefault()?.GetSyntax() as ClassDeclarationSyntax;
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if (syntax == null)
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return;
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// 1️⃣ 必须是 partial
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if (!syntax.Modifiers.Any(SyntaxKind.PartialKeyword))
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{
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context.ReportDiagnostic(Diagnostic.Create(
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CommonDiagnostics.ClassMustBePartial,
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syntax.Identifier.GetLocation(),
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symbol.Name
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));
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return;
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}
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// 2️⃣ 必须实现 IContextAware（直接或间接）
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if (!symbol.AllInterfaces.Any(i => i.ToDisplayString() == "GFramework.Core.rule.IContextAware"))
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{
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context.ReportDiagnostic(Diagnostic.Create(
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ContextAwareDiagnostic.ClassMustImplementIContextAware,
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syntax.Identifier.GetLocation(),
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symbol.Name
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));
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return;
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}
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// 3️⃣ 生成源码
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var ns = symbol.ContainingNamespace.IsGlobalNamespace
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? null
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: symbol.ContainingNamespace.ToDisplayString();
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var source = GenerateSource(ns, symbol);
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context
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.AddSource(
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$"{symbol.Name}.ContextAware.g.cs",
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source);
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}
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#endregion
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#region 源码生成
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private static string GenerateSource(string? ns, INamedTypeSymbol symbol)
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{
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var sb = new StringBuilder();
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sb.AppendLine("// <auto-generated/>");
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sb.AppendLine("#nullable enable");
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if (ns is not null)
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{
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sb.AppendLine($"namespace {ns};");
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sb.AppendLine();
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}
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sb.AppendLine($"partial class {symbol.Name}");
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sb.AppendLine("{");
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sb.AppendLine(
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" protected GFramework.Core.architecture.IArchitectureContext Context { get; private set; } = null!;");
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sb.AppendLine(" void GFramework.Core.rule.IContextAware.SetContext(");
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sb.AppendLine(" GFramework.Core.architecture.IArchitectureContext context)");
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sb.AppendLine(" {");
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sb.AppendLine(" Context = context;");
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sb.AppendLine(" }");
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sb.AppendLine("}");
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return sb.ToString().TrimEnd();
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}
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#endregion
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} |