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Refactor into Invocation > Parser > Emitter
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,59 @@ | ||
| using Microsoft.CodeAnalysis.CSharp; | ||
| using Microsoft.CodeAnalysis; | ||
| using Microsoft.CodeAnalysis.CSharp.Syntax; | ||
| using static Microsoft.CodeAnalysis.CSharp.SyntaxFactory; | ||
| using Microsoft.CodeAnalysis.Operations; | ||
|
|
||
| namespace Pretender.SourceGenerator.Emitter | ||
| { | ||
| internal class SetupEmitter | ||
| { | ||
| private readonly SetupActionEmitter _setupActionEmitter; | ||
| private readonly IInvocationOperation _setupInvocation; | ||
|
|
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| public SetupEmitter(SetupActionEmitter setupActionEmitter, IInvocationOperation setupInvocation) | ||
| { | ||
| _setupActionEmitter = setupActionEmitter; | ||
| _setupInvocation = setupInvocation; | ||
| } | ||
|
|
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| // TODO: Run cancellationToken a lot more | ||
| public MemberDeclarationSyntax[] Emit(int index, CancellationToken cancellationToken) | ||
| { | ||
| var setupMethod = _setupActionEmitter.SetupMethod; | ||
| var pretendType = _setupActionEmitter.PretendType; | ||
|
|
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| var allMembers = new List<MemberDeclarationSyntax>(); | ||
|
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| var interceptsLocation = new InterceptsLocationInfo(_setupInvocation); | ||
|
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| // TODO: This is wrong | ||
| var typeArguments = setupMethod.ReturnsVoid | ||
| ? TypeArgumentList(SingletonSeparatedList(ParseTypeName(pretendType.ToFullDisplayString()))) | ||
| : TypeArgumentList(SeparatedList([ParseTypeName(pretendType.ToFullDisplayString()), setupMethod.ReturnType.AsUnknownTypeSyntax()])); | ||
|
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| var returnType = GenericName("IPretendSetup") | ||
| .WithTypeArgumentList(typeArguments); | ||
|
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| var setupCreatorInvocation = _setupActionEmitter.CreateSetupGetter(cancellationToken); | ||
|
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| var fullSetupMethod = MethodDeclaration(returnType, $"Setup{index}") | ||
| .WithBody(Block(ReturnStatement(setupCreatorInvocation))) | ||
| .WithParameterList(ParameterList(SeparatedList(new[] | ||
| { | ||
| Parameter(Identifier("pretend")) | ||
| .WithModifiers(TokenList(Token(SyntaxKind.ThisKeyword))) | ||
| .WithType(ParseTypeName($"Pretend<{pretendType.ToDisplayString(SymbolDisplayFormat.FullyQualifiedFormat)}>")), | ||
|
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| Parameter(Identifier("setupExpression")) | ||
| .WithType(GenericName(setupMethod.ReturnsVoid ? "Action" : "Func").WithTypeArgumentList(typeArguments)), | ||
| }))) | ||
| .WithModifiers(TokenList(Token(SyntaxKind.InternalKeyword), Token(SyntaxKind.StaticKeyword))) | ||
| .WithAttributeLists(SingletonList(AttributeList( | ||
| SingletonSeparatedList(interceptsLocation.ToAttributeSyntax())))); | ||
|
|
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| allMembers.Add(fullSetupMethod); | ||
| return [.. allMembers]; | ||
| } | ||
| } | ||
| } |
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177 changes: 177 additions & 0 deletions
177
src/Pretender.SourceGenerator/Parser/SetupActionParser.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,177 @@ | ||
| using System.Collections.Immutable; | ||
| using System.Diagnostics; | ||
| using Microsoft.CodeAnalysis; | ||
| using Microsoft.CodeAnalysis.Operations; | ||
| using Pretender.SourceGenerator.SetupArguments; | ||
|
|
||
| namespace Pretender.SourceGenerator.Parser | ||
| { | ||
| internal class SetupActionParser | ||
| { | ||
| private readonly IOperation _setupActionArgument; | ||
| private readonly ITypeSymbol _pretendType; | ||
| private readonly bool _forcePropertySetter; | ||
|
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| // TODO: Should I have a higher IOperation kind here? Like InvocationOperation? | ||
| public SetupActionParser(IOperation setupActionArgument, ITypeSymbol pretendType, bool forcePropertySetter) | ||
| { | ||
| _setupActionArgument = setupActionArgument; | ||
| _pretendType = pretendType; | ||
| _forcePropertySetter = forcePropertySetter; | ||
| } | ||
|
|
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| public (SetupActionEmitter? Emitter, ImmutableArray<Diagnostic>? Diagnostics) Parse(CancellationToken cancellationToken) | ||
| { | ||
| var candidates = GetInvocationCandidates(cancellationToken); | ||
|
|
||
| if (candidates.Length == 0) | ||
| { | ||
| // TODO: Create error diagnostic | ||
| return (null, null); | ||
| } | ||
| else if (candidates.Length != 1) | ||
| { | ||
| // TODO: Create error diagnostic | ||
| return (null, null); | ||
| } | ||
|
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| var candidate = candidates[0]; | ||
|
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| var arguments = candidate.Arguments; | ||
|
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| var builder = ImmutableArray.CreateBuilder<SetupArgumentSpec>(arguments.Length); | ||
| for (var i = 0; i < arguments.Length; i++) | ||
| { | ||
| builder.Add(SetupArgumentSpec.Create(arguments[i], i)); | ||
| } | ||
|
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| return (new SetupActionEmitter(_pretendType, candidate.Method, builder.MoveToImmutable()), null); | ||
| } | ||
|
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| private ImmutableArray<InvocationCandidate> GetInvocationCandidates(CancellationToken cancellationToken) | ||
| { | ||
| var builder = ImmutableArray.CreateBuilder<InvocationCandidate>(); | ||
| TraverseOperation(_setupActionArgument, builder, cancellationToken); | ||
| return builder.ToImmutable(); | ||
| } | ||
|
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| private void TraverseOperation(IOperation operation, ImmutableArray<InvocationCandidate>.Builder invocationCandidates, CancellationToken cancellationToken) | ||
| { | ||
| cancellationToken.ThrowIfCancellationRequested(); | ||
|
|
||
| switch (operation.Kind) | ||
| { | ||
| case OperationKind.Block: | ||
| var blockOperation = (IBlockOperation)operation; | ||
| TraverseOperationList(blockOperation.Operations, invocationCandidates, cancellationToken); | ||
| break; | ||
| case OperationKind.Return: | ||
| var returnOperation = (IReturnOperation)operation; | ||
| if (returnOperation.ReturnedValue != null) | ||
| { | ||
| TraverseOperation(returnOperation.ReturnedValue, invocationCandidates, cancellationToken); | ||
| } | ||
| break; | ||
| case OperationKind.ExpressionStatement: | ||
| var expressionStatement = (IExpressionStatementOperation)operation; | ||
| TraverseOperation(expressionStatement.Operation, invocationCandidates, cancellationToken); | ||
| break; | ||
| case OperationKind.Conversion: | ||
| var conversionOperation = (IConversionOperation)operation; | ||
| TraverseOperation(conversionOperation.Operand, invocationCandidates, cancellationToken); | ||
| break; | ||
| case OperationKind.Invocation: | ||
| var invocationOperation = (IInvocationOperation)operation; | ||
| TryMatchInvocationOperation(invocationOperation, invocationCandidates); | ||
| break; | ||
| case OperationKind.PropertyReference: | ||
| var propertyReferenceOperation = (IPropertyReferenceOperation)operation; | ||
| TryMatchPropertyReference(propertyReferenceOperation, invocationCandidates); | ||
| break; | ||
| case OperationKind.AnonymousFunction: | ||
| var anonymousFunctionOperation = (IAnonymousFunctionOperation)operation; | ||
| TraverseOperation(anonymousFunctionOperation.Body, invocationCandidates, cancellationToken); | ||
| break; | ||
| case OperationKind.DelegateCreation: | ||
| var delegateCreationOperation = (IDelegateCreationOperation)operation; | ||
| TraverseOperation(delegateCreationOperation.Target, invocationCandidates, cancellationToken); | ||
| break; | ||
| default: | ||
| #if DEBUG | ||
| // TODO: Figure out what operation caused this, it's not ideal to "randomly" support operations | ||
| Debugger.Launch(); | ||
| #endif | ||
| // Absolute fallback, most of our operations can be supported this way but it's nicer to be explicit | ||
| TraverseOperationList(operation.ChildOperations, invocationCandidates, cancellationToken); | ||
| break; | ||
| } | ||
| } | ||
|
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| private void TraverseOperationList(IEnumerable<IOperation> operations, ImmutableArray<InvocationCandidate>.Builder invocationCandidates, CancellationToken cancellationToken) | ||
| { | ||
| cancellationToken.ThrowIfCancellationRequested(); | ||
| foreach (var operation in operations) | ||
| { | ||
| cancellationToken.ThrowIfCancellationRequested(); | ||
| TraverseOperation(operation, invocationCandidates, cancellationToken); | ||
| } | ||
| } | ||
|
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| private void TryMatchPropertyReference(IPropertyReferenceOperation propertyReference, ImmutableArray<InvocationCandidate>.Builder invocationCandidates) | ||
| { | ||
| if (propertyReference.Instance is not IParameterReferenceOperation parameterReference) | ||
| { | ||
| return; | ||
| } | ||
|
|
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| if (!SymbolEqualityComparer.Default.Equals(parameterReference.Type, _pretendType)) | ||
| { | ||
| return; | ||
| } | ||
|
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| var method = _forcePropertySetter | ||
| ? propertyReference.Property.SetMethod | ||
| : propertyReference.Property.GetMethod; | ||
|
|
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| if (method == null) | ||
| { | ||
| return; | ||
| } | ||
|
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| invocationCandidates.Add(new InvocationCandidate(method, ImmutableArray<IArgumentOperation>.Empty)); | ||
| } | ||
|
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| private void TryMatchInvocationOperation(IInvocationOperation invocation, ImmutableArray<InvocationCandidate>.Builder invocationCandidates) | ||
| { | ||
| if (_forcePropertySetter) | ||
| { | ||
| return; | ||
| } | ||
|
|
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| if (invocation.Instance is not IParameterReferenceOperation parameterReference) | ||
| { | ||
| return; | ||
| } | ||
|
|
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| if (!SymbolEqualityComparer.Default.Equals(parameterReference.Type, _pretendType)) | ||
| { | ||
| return; | ||
| } | ||
|
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| // TODO: Any more validation? | ||
| invocationCandidates.Add(new InvocationCandidate(invocation.TargetMethod, invocation.Arguments)); | ||
| } | ||
|
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| private class InvocationCandidate | ||
| { | ||
| public InvocationCandidate(IMethodSymbol methodSymbol, ImmutableArray<IArgumentOperation> argumentOperations) | ||
| { | ||
| Method = methodSymbol; | ||
| Arguments = argumentOperations; | ||
| } | ||
|
|
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| public IMethodSymbol Method { get; } | ||
| public ImmutableArray<IArgumentOperation> Arguments { get; } | ||
| } | ||
| } | ||
| } |
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