public override void Initialize(AnalysisContext context)
{
context.EnableConcurrentExecution();
context.ConfigureGeneratedCodeAnalysis(GeneratedCodeAnalysisFlags.Analyze | GeneratedCodeAnalysisFlags.ReportDiagnostics);
context.RegisterCompilationStartAction(compilationStartContext =>
{
if (OperatorTypesMatcher.TryParseTypes(compilationStartContext.Compilation, out var types))
{
compilationStartContext.RegisterSyntaxNodeAction(
c => AnalyzeGenericNode(c, types), SyntaxKind.GenericName);
}
});
}
public override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
if (await context.Document.GetSyntaxRootAsync(context.CancellationToken).ConfigureAwait(false)
is not CompilationUnitSyntax root)
{
return;
}
var config = AtCoderAnalyzerConfig.Parse(context.Document.Project.AnalyzerOptions.AnalyzerConfigOptionsProvider.GlobalOptions);
var diagnostic = context.Diagnostics[0];
var diagnosticSpan = diagnostic.Location.SourceSpan;
if (root.FindNode(diagnosticSpan)
is not GenericNameSyntax genericNode)
{
return;
}
var semanticModel = await context.Document.GetSemanticModelAsync(context.CancellationToken).ConfigureAwait(false);
ImmutableArray <ITypeParameterSymbol> originalTypes;
ImmutableArray <ITypeSymbol> writtenTypes;
switch (semanticModel.GetSymbolInfo(genericNode, context.CancellationToken).Symbol)
{
case INamedTypeSymbol symbol:
originalTypes = symbol.TypeParameters;
writtenTypes = symbol.TypeArguments;
break;
case IMethodSymbol symbol:
originalTypes = symbol.TypeParameters;
writtenTypes = symbol.TypeArguments;
break;
default:
return;
}
var writtenTypeSyntaxes = genericNode.TypeArgumentList.Arguments;
if (originalTypes.Length != writtenTypes.Length)
{
return;
}
if (!OperatorTypesMatcher.TryParseTypes(semanticModel.Compilation, out var types))
{
return;
}
var defaultSet = ImmutableHashSet.Create <ITypeSymbol>(SymbolEqualityComparer.Default);
var genericDicBuilder = ImmutableDictionary.CreateBuilder <ITypeParameterSymbol, ITypeSymbol>(SymbolEqualityComparer.Default);
var constraintDicBuilder = ImmutableDictionary.CreateBuilder <string, ImmutableHashSet <ITypeSymbol> >();
for (int i = 0; i < originalTypes.Length; i++)
{
var writtenTypeSyntax = writtenTypeSyntaxes[i];
var originalType = originalTypes[i];
var constraintTypes = originalType.ConstraintTypes;
var writtenType = writtenTypes[i];
if (!constraintTypes
.OfType <INamedTypeSymbol>()
.Select(ty => ty.ConstructedFrom)
.Any(ty => types.IsMatch(ty)))
{
genericDicBuilder.Add(originalType, writtenType);
continue;
}
if (writtenType.TypeKind == TypeKind.Error)
{
var name = writtenType.Name;
var typeSymbols = constraintDicBuilder.GetValueOrDefault(name, defaultSet);
constraintDicBuilder[name] = typeSymbols.Union(constraintTypes);
}
}
if (constraintDicBuilder.Count == 0)
{
return;
}
var genericDic = genericDicBuilder.ToImmutable();
var constraintArrayDic = ImmutableDictionary.CreateBuilder <string, ImmutableArray <ITypeSymbol> >();
foreach (var p in constraintDicBuilder)
{
constraintArrayDic[p.Key]
= p.Value.Select(sy => SymbolHelpers.ReplaceGenericType(sy, genericDic))
.OrderBy(sy => sy.ToDisplayString())
.ToImmutableArray();
}
var action = CodeAction.Create(title: title,
createChangedDocument: c => new OperatorTypeSyntaxBuilder(semanticModel, config).AddOperatorType(
context.Document,
root,
constraintArrayDic.ToImmutable()),
equivalenceKey: title);
context.RegisterCodeFix(action, diagnostic);
}