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Prune unreferenced files (microsoft#4301)
Fixes microsoft#4218 Replaces microsoft#4288
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168 changes: 168 additions & 0 deletions
168
...t-csharp/generator/Microsoft.Generator.CSharp/src/PostProcessing/MemberRemoverRewriter.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,168 @@ | ||
| // Copyright (c) Microsoft Corporation. All rights reserved. | ||
| // Licensed under the MIT License. | ||
|
|
||
| using System.Linq; | ||
| using Microsoft.CodeAnalysis; | ||
| using Microsoft.CodeAnalysis.CSharp; | ||
| using Microsoft.CodeAnalysis.CSharp.Syntax; | ||
|
|
||
| namespace Microsoft.Generator.CSharp | ||
| { | ||
| internal class MemberRemoverRewriter : CSharpSyntaxRewriter | ||
| { | ||
| private readonly Project _project; | ||
| private readonly SemanticModel _semanticModel; | ||
|
|
||
| public MemberRemoverRewriter(Project project, SemanticModel semanticModel) | ||
| { | ||
| _project = project; | ||
| _semanticModel = semanticModel; | ||
| } | ||
|
|
||
| public override SyntaxNode? VisitCompilationUnit(CompilationUnitSyntax node) | ||
| { | ||
| var visitedNode = base.VisitCompilationUnit(node); | ||
| return visitedNode is CompilationUnitSyntax cu && !cu.Members.Any() ? SyntaxFactory.CompilationUnit() : visitedNode; | ||
| } | ||
|
|
||
| public override SyntaxNode? VisitNamespaceDeclaration(NamespaceDeclarationSyntax node) | ||
| { | ||
| var visitedNode = base.VisitNamespaceDeclaration(node); | ||
| return visitedNode is NamespaceDeclarationSyntax ns && !ns.Members.Any() ? null : visitedNode; | ||
| } | ||
|
|
||
| public override SyntaxNode? VisitConstructorDeclaration(ConstructorDeclarationSyntax node) | ||
| { | ||
| var symbol = _semanticModel.GetDeclaredSymbol(node); | ||
| return ShouldRemoveMember(symbol) ? null : base.VisitConstructorDeclaration(node); | ||
| } | ||
|
|
||
| public override SyntaxNode? VisitPropertyDeclaration(PropertyDeclarationSyntax node) | ||
| { | ||
| var symbol = _semanticModel.GetDeclaredSymbol(node); | ||
| return ShouldRemoveMember(symbol) ? null : base.VisitPropertyDeclaration(node); | ||
| } | ||
|
|
||
| public override SyntaxNode? VisitMethodDeclaration(MethodDeclarationSyntax node) | ||
| { | ||
| var symbol = _semanticModel.GetDeclaredSymbol(node); | ||
| return ShouldRemoveMember(symbol) ? null : base.VisitMethodDeclaration(node); | ||
| } | ||
|
|
||
| public override SyntaxNode? VisitOperatorDeclaration(OperatorDeclarationSyntax node) | ||
| { | ||
| var symbol = _semanticModel.GetDeclaredSymbol(node); | ||
| return ShouldRemoveMember(symbol) ? null : base.VisitOperatorDeclaration(node); | ||
| } | ||
|
|
||
| public override SyntaxNode? VisitConversionOperatorDeclaration(ConversionOperatorDeclarationSyntax node) | ||
| { | ||
| var symbol = _semanticModel.GetDeclaredSymbol(node); | ||
| return ShouldRemoveMember(symbol) ? null : base.VisitConversionOperatorDeclaration(node); | ||
| } | ||
|
|
||
| public override SyntaxNode? VisitFieldDeclaration(FieldDeclarationSyntax node) | ||
| { | ||
| var symbol = node.Declaration.Variables.Count == 1 | ||
| ? _semanticModel.GetDeclaredSymbol(node.Declaration.Variables[0]) | ||
| : null; | ||
|
|
||
| return ShouldRemoveMember(symbol) ? null : base.VisitFieldDeclaration(node); | ||
| } | ||
|
|
||
| private bool ShouldRemoveMember(ISymbol? symbol) | ||
| { | ||
| if (symbol != null) | ||
| { | ||
| INamedTypeSymbol? containingType = symbol.ContainingType; | ||
| IMethodSymbol? methodSymbol = symbol as IMethodSymbol; | ||
|
|
||
| while (containingType != null) | ||
| { | ||
| var members = containingType.GetMembers(symbol.Name); | ||
| foreach (var member in members) | ||
| { | ||
| if (!SymbolEqualityComparer.Default.Equals(member, symbol) && | ||
| IsDeclaredInNonGeneratedCode(member)) | ||
| { | ||
| if (methodSymbol != null && | ||
| member is IMethodSymbol memberMethodSymbol && | ||
| !methodSymbol.Parameters.SequenceEqual( | ||
| memberMethodSymbol.Parameters, (s1, s2) => SymbolEqualityComparer.Default.Equals(s1, s2.Type))) | ||
| { | ||
| continue; | ||
| } | ||
|
|
||
| return true; | ||
| } | ||
| } | ||
|
|
||
| // Skip traversing parents for constructors and explicit interface implementations | ||
| if (methodSymbol != null && | ||
| (methodSymbol.MethodKind == MethodKind.Constructor || | ||
| !methodSymbol.ExplicitInterfaceImplementations.IsEmpty)) | ||
| { | ||
| break; | ||
| } | ||
| containingType = containingType.BaseType; | ||
| } | ||
| } | ||
|
|
||
| return false; | ||
| } | ||
|
|
||
| private bool IsDeclaredInNonGeneratedCode(ISymbol member) | ||
| { | ||
| var references = member.DeclaringSyntaxReferences; | ||
|
|
||
| if (references.Length == 0) | ||
| { | ||
| return false; | ||
| } | ||
|
|
||
| foreach (var reference in references) | ||
| { | ||
| Document? document = _project.GetDocument(reference.SyntaxTree); | ||
|
|
||
| if (document != null && GeneratedCodeWorkspace.IsGeneratedDocument(document)) | ||
| { | ||
| return false; | ||
| } | ||
| } | ||
|
|
||
| return true; | ||
| } | ||
|
|
||
| private readonly struct Supression | ||
| { | ||
| private readonly string? _name; | ||
| private readonly ISymbol?[] _types; | ||
|
|
||
| public Supression(string? name, ISymbol?[] types) | ||
| { | ||
| _name = name; | ||
| _types = types; | ||
| } | ||
|
|
||
| public bool Matches(ISymbol symbol) | ||
| { | ||
| if (symbol is IMethodSymbol methodSymbol) | ||
| { | ||
| string name = methodSymbol.Name; | ||
| // Use friendly name for ctors | ||
| if (methodSymbol.MethodKind == MethodKind.Constructor) | ||
| { | ||
| name = methodSymbol.ContainingType.Name; | ||
| } | ||
|
|
||
| return _name == name && | ||
| _types.SequenceEqual(methodSymbol.Parameters.Select(p => p.Type), SymbolEqualityComparer.Default); | ||
| } | ||
| else | ||
| { | ||
| return symbol.Name == _name; | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } |
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