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// Copyright (c) .NET Foundation and contributors. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.
using System;
using System.Diagnostics;
using ILLink.RoslynAnalyzer.DataFlow;
using ILLink.Shared.TrimAnalysis;
using Microsoft.CodeAnalysis;
namespace ILLink.RoslynAnalyzer.TrimAnalysis
{
internal readonly record struct TrimAnalysisGenericInstantiationPattern
{
public ISymbol GenericInstantiation { get; init; }
public IOperation Operation { get; init; }
public ISymbol OwningSymbol { get; init; }
public FeatureContext FeatureContext { get; init; }
public TrimAnalysisGenericInstantiationPattern(
ISymbol genericInstantiation,
IOperation operation,
ISymbol owningSymbol,
FeatureContext featureContext)
{
GenericInstantiation = genericInstantiation;
Operation = operation;
OwningSymbol = owningSymbol;
FeatureContext = featureContext.DeepCopy();
}
public TrimAnalysisGenericInstantiationPattern Merge(
FeatureContextLattice featureContextLattice,
TrimAnalysisGenericInstantiationPattern other)
{
Debug.Assert(Operation == other.Operation);
Debug.Assert(SymbolEqualityComparer.Default.Equals(GenericInstantiation, other.GenericInstantiation));
Debug.Assert(SymbolEqualityComparer.Default.Equals(OwningSymbol, other.OwningSymbol));
return new TrimAnalysisGenericInstantiationPattern(
GenericInstantiation,
Operation,
OwningSymbol,
featureContextLattice.Meet(FeatureContext, other.FeatureContext));
}
public void ReportDiagnostics(DataFlowAnalyzerContext context, Action<Diagnostic> reportDiagnostic)
{
if (context.EnableTrimAnalyzer &&
!OwningSymbol.IsInRequiresUnreferencedCodeAttributeScope(out _) &&
!FeatureContext.IsEnabled(RequiresUnreferencedCodeAnalyzer.FullyQualifiedRequiresUnreferencedCodeAttribute))
{
var location = Operation.Syntax.GetLocation();
switch (GenericInstantiation)
{
case INamedTypeSymbol type:
GenericArgumentDataFlow.ProcessGenericArgumentDataFlow(location, type, reportDiagnostic);
break;
case IMethodSymbol method:
GenericArgumentDataFlow.ProcessGenericArgumentDataFlow(location, method, reportDiagnostic);
break;
case IFieldSymbol field:
GenericArgumentDataFlow.ProcessGenericArgumentDataFlow(location, field, reportDiagnostic);
break;
}
}
}
}
}
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