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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
#nullable enable
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Collections.Immutable;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Runtime.Serialization;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.PooledObjects;
using Microsoft.CodeAnalysis.Shared.Utilities;
using Microsoft.CodeAnalysis.Shared.Extensions;
namespace Microsoft.CodeAnalysis;
internal static class CompilationExtensions
{
public static ImmutableArray<Compilation> GetReferencedCompilations(this Compilation compilation)
{
var builder = ArrayBuilder<Compilation>.GetInstance();
foreach (var reference in compilation.References.OfType<CompilationReference>())
{
builder.Add(reference.Compilation);
}
var previous = compilation.ScriptCompilationInfo?.PreviousScriptCompilation;
while (previous != null)
{
builder.Add(previous);
previous = previous.ScriptCompilationInfo?.PreviousScriptCompilation;
}
return builder.ToImmutableAndFree();
}
public static ImmutableArray<IAssemblySymbol> GetReferencedAssemblySymbols(this Compilation compilation, bool excludePreviousSubmissions = false)
{
// The first module of every assembly is its source module and the source
// module always has the list of all referenced assemblies.
var referencedAssemblySymbols = compilation.Assembly.Modules.First().ReferencedAssemblySymbols;
if (excludePreviousSubmissions)
{
return referencedAssemblySymbols;
}
// Do a quick check first to avoid unnecessary allocations in case this is not a script compilation.
var previous = compilation.ScriptCompilationInfo?.PreviousScriptCompilation;
if (previous is null)
{
return referencedAssemblySymbols;
}
var builder = ArrayBuilder<IAssemblySymbol>.GetInstance();
builder.AddRange(referencedAssemblySymbols);
while (previous != null)
{
builder.Add(previous.Assembly);
previous = previous.ScriptCompilationInfo?.PreviousScriptCompilation;
}
return builder.ToImmutableAndFree();
}
public static INamedTypeSymbol? ArgumentExceptionType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(ArgumentException).FullName!);
public static INamedTypeSymbol? ArgumentNullExceptionType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(ArgumentNullException).FullName!);
public static INamedTypeSymbol? ArgumentOutOfRangeExceptionType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(ArgumentOutOfRangeException).FullName!);
public static INamedTypeSymbol? ArrayType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(Array).FullName!);
public static INamedTypeSymbol? AttributeType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(Attribute).FullName!);
public static INamedTypeSymbol? BlockingCollectionOfTType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(BlockingCollection<>).FullName!);
public static INamedTypeSymbol? CollectionOfTType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(Collection<>).FullName!);
public static INamedTypeSymbol? ExceptionType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(Exception).FullName!);
public static INamedTypeSymbol? DebuggerDisplayAttributeType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(System.Diagnostics.DebuggerDisplayAttribute).FullName!);
public static INamedTypeSymbol? StructLayoutAttributeType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(StructLayoutAttribute).FullName!);
public static INamedTypeSymbol? InlineArrayAttributeType(this Compilation compilation)
=> compilation.GetTypeByMetadataName("System.Runtime.CompilerServices.InlineArrayAttribute");
public static INamedTypeSymbol? DesignerCategoryAttributeType(this Compilation compilation)
=> compilation.GetTypeByMetadataName("System.ComponentModel.DesignerCategoryAttribute");
public static INamedTypeSymbol? DesignerGeneratedAttributeType(this Compilation compilation)
=> compilation.GetTypeByMetadataName("Microsoft.VisualBasic.CompilerServices.DesignerGeneratedAttribute");
public static INamedTypeSymbol? HideModuleNameAttribute(this Compilation compilation)
=> compilation.GetTypeByMetadataName("Microsoft.VisualBasic.HideModuleNameAttribute");
public static INamedTypeSymbol? ThreadStaticAttributeType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(ThreadStaticAttribute).FullName!);
public static INamedTypeSymbol? FormattableStringType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(FormattableString).FullName!);
public static INamedTypeSymbol? EventArgsType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(EventArgs).FullName!);
public static INamedTypeSymbol? NotImplementedExceptionType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(NotImplementedException).FullName!);
public static INamedTypeSymbol? EqualityComparerOfTType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(EqualityComparer<>).FullName!);
public static INamedTypeSymbol? ActionType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(Action).FullName!);
public static INamedTypeSymbol? ExpressionOfTType(this Compilation compilation)
=> compilation.GetTypeByMetadataName("System.Linq.Expressions.Expression`1");
public static INamedTypeSymbol? EditorBrowsableAttributeType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(EditorBrowsableAttribute).FullName!);
public static INamedTypeSymbol? EditorBrowsableStateType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(EditorBrowsableState).FullName!);
public static INamedTypeSymbol? TaskType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(Task).FullName!);
public static INamedTypeSymbol? TaskOfTType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(Task<>).FullName!);
public static INamedTypeSymbol? ValueTaskType(this Compilation compilation)
=> compilation.GetTypeByMetadataName("System.Threading.Tasks.ValueTask");
public static INamedTypeSymbol? ValueTaskOfTType(this Compilation compilation)
=> compilation.GetTypeByMetadataName("System.Threading.Tasks.ValueTask`1");
public static INamedTypeSymbol? IEnumerableType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(System.Collections.IEnumerable).FullName!);
public static INamedTypeSymbol? IEnumerableOfTType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(IEnumerable<>).FullName!);
public static INamedTypeSymbol? IEnumeratorOfTType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(IEnumerator<>).FullName!);
public static INamedTypeSymbol? IListOfTType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(IList<>).FullName!);
public static INamedTypeSymbol? IReadOnlyListOfTType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(IReadOnlyList<>).FullName!);
public static INamedTypeSymbol? ISetOfTType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(ISet<>).FullName!);
public static INamedTypeSymbol? IReadOnlySetOfTType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(IReadOnlySet<>).FullName!);
public static INamedTypeSymbol? IAsyncEnumerableOfTType(this Compilation compilation)
=> compilation.GetTypeByMetadataName("System.Collections.Generic.IAsyncEnumerable`1");
public static INamedTypeSymbol? IAsyncEnumeratorOfTType(this Compilation compilation)
=> compilation.GetTypeByMetadataName("System.Collections.Generic.IAsyncEnumerator`1");
public static INamedTypeSymbol? ImmutableArrayOfTType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(ImmutableArray<>).FullName!);
public static INamedTypeSymbol? SerializableAttributeType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(SerializableAttribute).FullName!);
public static INamedTypeSymbol? CoClassType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(CoClassAttribute).FullName!);
public static INamedTypeSymbol? ComAliasNameAttributeType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(ComAliasNameAttribute).FullName!);
public static INamedTypeSymbol? SuppressMessageAttributeType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(SuppressMessageAttribute).FullName!);
public static INamedTypeSymbol? TupleElementNamesAttributeType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(TupleElementNamesAttribute).FullName!);
public static INamedTypeSymbol? NativeIntegerAttributeType(this Compilation compilation)
=> compilation.GetTypeByMetadataName("System.Runtime.CompilerServices.NativeIntegerAttribute");
public static INamedTypeSymbol? DynamicAttributeType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(DynamicAttribute).FullName!);
public static INamedTypeSymbol? LazyOfTType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(Lazy<>).FullName!);
public static INamedTypeSymbol? ISerializableType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(ISerializable).FullName!);
public static INamedTypeSymbol? SerializationInfoType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(SerializationInfo).FullName!);
public static INamedTypeSymbol? StreamingContextType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(StreamingContext).FullName!);
public static INamedTypeSymbol? OnDeserializingAttribute(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(OnDeserializingAttribute).FullName!);
public static INamedTypeSymbol? OnDeserializedAttribute(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(OnDeserializedAttribute).FullName!);
public static INamedTypeSymbol? OnSerializingAttribute(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(OnSerializingAttribute).FullName!);
public static INamedTypeSymbol? OnSerializedAttribute(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(OnSerializedAttribute).FullName!);
public static INamedTypeSymbol? ComRegisterFunctionAttribute(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(ComRegisterFunctionAttribute).FullName!);
public static INamedTypeSymbol? ComUnregisterFunctionAttribute(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(ComUnregisterFunctionAttribute).FullName!);
public static INamedTypeSymbol? ConditionalAttribute(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(ConditionalAttribute).FullName!);
public static INamedTypeSymbol? ObsoleteAttribute(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(ObsoleteAttribute).FullName!);
public static INamedTypeSymbol? SystemCompositionImportingConstructorAttribute(this Compilation compilation)
=> compilation.GetTypeByMetadataName("System.Composition.ImportingConstructorAttribute");
public static INamedTypeSymbol? SystemComponentModelCompositionImportingConstructorAttribute(this Compilation compilation)
=> compilation.GetTypeByMetadataName("System.ComponentModel.Composition.ImportingConstructorAttribute");
public static INamedTypeSymbol? SystemIDisposableType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(IDisposable).FullName!);
public static INamedTypeSymbol? NotNullAttribute(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(NotNullAttribute).FullName!);
public static INamedTypeSymbol? MaybeNullAttribute(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(MaybeNullAttribute).FullName!);
public static INamedTypeSymbol? MaybeNullWhenAttribute(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(MaybeNullWhenAttribute).FullName!);
public static INamedTypeSymbol? AllowNullAttribute(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(AllowNullAttribute).FullName!);
public static INamedTypeSymbol? DisallowNullAttribute(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(DisallowNullAttribute).FullName!);
public static INamedTypeSymbol? DataMemberAttribute(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(DataMemberAttribute).FullName!);
public static INamedTypeSymbol? DataContractAttribute(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(DataContractAttribute).FullName!);
public static INamedTypeSymbol? AsyncMethodBuilderAttribute(this Compilation compilation)
=> compilation.GetTypeByMetadataName("System.Runtime.CompilerServices.AsyncMethodBuilderAttribute");
public static INamedTypeSymbol? CancellationTokenType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(CancellationToken).FullName!);
public static INamedTypeSymbol? ValueTupleType(this Compilation compilation, int arity)
=> compilation.GetTypeByMetadataName($"System.ValueTuple`{arity}");
public static INamedTypeSymbol? ListOfTType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(List<>).FullName!);
public static INamedTypeSymbol? ReadOnlySpanOfTType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(ReadOnlySpan<>).FullName!);
public static INamedTypeSymbol? SpanOfTType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(Span<>).FullName!);
public static INamedTypeSymbol? InterpolatedStringHandlerAttributeType(this Compilation compilation)
=> compilation.GetTypeByMetadataName(typeof(InterpolatedStringHandlerAttribute).FullName!);
/// <summary>
/// Gets a type by its metadata name to use for code analysis within a <see cref="Compilation"/>. This method
/// attempts to find the "best" symbol to use for code analysis, which is the symbol matching the first of the
/// following rules.
///
/// <list type="number">
/// <item><description>
/// If only one type with the given name is found within the compilation and its referenced assemblies, that
/// type is returned regardless of accessibility.
/// </description></item>
/// <item><description>
/// If the current <paramref name="compilation"/> defines the symbol, that symbol is returned.
/// </description></item>
/// <item><description>
/// If exactly one referenced assembly defines the symbol in a manner that makes it visible to the current
/// <paramref name="compilation"/>, that symbol is returned.
/// </description></item>
/// <item><description>
/// Otherwise, this method returns <see langword="null"/>.
/// </description></item>
/// </list>
/// </summary>
/// <param name="compilation">The <see cref="Compilation"/> to consider for analysis.</param>
/// <param name="fullyQualifiedMetadataName">The fully-qualified metadata type name to find.</param>
/// <returns>The symbol to use for code analysis; otherwise, <see langword="null"/>.</returns>
public static INamedTypeSymbol? GetBestTypeByMetadataName(this Compilation compilation, string fullyQualifiedMetadataName)
{
INamedTypeSymbol? type = null;
foreach (var currentType in compilation.GetTypesByMetadataName(fullyQualifiedMetadataName))
{
if (ReferenceEquals(currentType.ContainingAssembly, compilation.Assembly))
{
Debug.Assert(type is null);
return currentType;
}
switch (currentType.GetResultantVisibility())
{
case SymbolVisibility.Public:
case SymbolVisibility.Internal when currentType.ContainingAssembly.GivesAccessTo(compilation.Assembly):
break;
default:
continue;
}
if (type is object)
{
// Multiple visible types with the same metadata name are present
return null;
}
type = currentType;
}
return type;
}
/// <summary>
/// Gets implicit method, that wraps top-level statements.
/// </summary>
public static IMethodSymbol? GetTopLevelStatementsMethod(this Compilation compilation)
{
foreach (var candidateTopLevelType in compilation.SourceModule.GlobalNamespace.GetTypeMembers(WellKnownMemberNames.TopLevelStatementsEntryPointTypeName, arity: 0))
{
foreach (var candidateMember in candidateTopLevelType.GetMembers(WellKnownMemberNames.TopLevelStatementsEntryPointMethodName))
{
if (candidateMember is IMethodSymbol method)
return method;
}
}
return null;
}
public static INamedTypeSymbol? TryGetCallingConventionSymbol(this Compilation compilation, string callingConvention)
=> compilation.GetBestTypeByMetadataName($"System.Runtime.CompilerServices.CallConv{callingConvention}");
}
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