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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 disable
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.CodeGeneration;
using Microsoft.CodeAnalysis.Editing;
using Microsoft.CodeAnalysis.FindSymbols;
using Microsoft.CodeAnalysis.LanguageService;
using Microsoft.CodeAnalysis.Shared.Extensions;
using Microsoft.CodeAnalysis.Shared.Utilities;
using Microsoft.CodeAnalysis.Host;
namespace Microsoft.CodeAnalysis.GenerateMember.GenerateParameterizedMember;
internal abstract partial class AbstractGenerateParameterizedMemberService<TService, TSimpleNameSyntax, TExpressionSyntax, TInvocationExpressionSyntax>
{
internal abstract class State
{
public INamedTypeSymbol ContainingType { get; protected set; }
public INamedTypeSymbol TypeToGenerateIn { get; protected set; }
public bool IsStatic { get; protected set; }
public bool IsContainedInUnsafeType { get; protected set; }
// Just the name of the method. i.e. "Goo" in "X.Goo" or "X.Goo()"
public SyntaxToken IdentifierToken { get; protected set; }
public TSimpleNameSyntax SimpleNameOpt { get; protected set; }
// The entire expression containing the name, not including the invocation. i.e. "X.Goo"
// in "X.Goo()".
public TExpressionSyntax SimpleNameOrMemberAccessExpression { get; protected set; }
public TInvocationExpressionSyntax InvocationExpressionOpt { get; protected set; }
public bool IsInConditionalAccessExpression { get; protected set; }
public bool IsWrittenTo { get; protected set; }
public SignatureInfo SignatureInfo { get; protected set; }
public MethodKind MethodKind { get; internal set; }
public MethodGenerationKind MethodGenerationKind { get; protected set; }
protected Location location = null;
public Location Location
{
get
{
if (IdentifierToken.SyntaxTree != null)
{
return IdentifierToken.GetLocation();
}
return location;
}
}
protected async Task<bool> TryFinishInitializingStateAsync(TService service, SemanticDocument document, CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
TypeToGenerateIn = await SymbolFinder.FindSourceDefinitionAsync(TypeToGenerateIn, document.Project.Solution, cancellationToken).ConfigureAwait(false) as INamedTypeSymbol;
if (TypeToGenerateIn.IsErrorType())
{
return false;
}
if (!ValidateTypeToGenerateIn(TypeToGenerateIn, IsStatic, ClassInterfaceModuleStructTypes))
{
return false;
}
if (!CodeGenerator.CanAdd(document.Project.Solution, TypeToGenerateIn, cancellationToken))
{
return false;
}
// Ok. It either didn't bind to any symbols, or it bound to a symbol but with
// errors. In the former case we definitely want to offer to generate a method. In
// the latter case, we want to generate a method *unless* there's an existing method
// with the same signature.
var existingMethods = TypeToGenerateIn
.GetMembers(IdentifierToken.ValueText)
.OfType<IMethodSymbol>();
var destinationProvider = document.Project.Solution.Workspace.Services.GetExtendedLanguageServices(TypeToGenerateIn.Language);
var syntaxFacts = destinationProvider.GetService<ISyntaxFactsService>();
var syntaxFactory = destinationProvider.GetService<SyntaxGenerator>();
IsContainedInUnsafeType = service.ContainingTypesOrSelfHasUnsafeKeyword(TypeToGenerateIn);
var generatedMethod = await SignatureInfo.GenerateMethodAsync(syntaxFactory, false, cancellationToken).ConfigureAwait(false);
return !existingMethods.Any(m => SignatureComparer.Instance.HaveSameSignature(m, generatedMethod, caseSensitive: syntaxFacts.IsCaseSensitive, compareParameterName: true, isParameterCaseSensitive: syntaxFacts.IsCaseSensitive));
}
}
}
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