private void DetermineFieldType(
SemanticDocument document,
CancellationToken cancellationToken)
{
var typeInference = document.Project.LanguageServices.GetService <ITypeInferenceService>();
var inferredType = typeInference.InferType(
document.SemanticModel, this.SimpleNameOrMemberAccessExpressionOpt, objectAsDefault: true,
nameOpt: this.IdentifierToken.ValueText, cancellationToken: cancellationToken);
var compilation = document.SemanticModel.Compilation;
inferredType = inferredType.SpecialType == SpecialType.System_Void
? compilation.ObjectType
: inferredType;
if (this.IsInConditionalAccessExpression)
{
inferredType = inferredType.RemoveNullableIfPresent();
}
if (inferredType.IsDelegateType() && !inferredType.CanBeReferencedByName)
{
var namedDelegateType = inferredType.GetDelegateType(compilation)?.DelegateInvokeMethod?.ConvertToType(compilation);
if (namedDelegateType != null)
{
inferredType = namedDelegateType;
}
}
// Substitute 'object' for all captured method type parameters. Note: we may need to
// do this for things like anonymous types, as well as captured type parameters that
// aren't in scope in the destination type.
var capturedMethodTypeParameters = inferredType.GetReferencedMethodTypeParameters();
var mapping = capturedMethodTypeParameters.ToDictionary(tp => tp,
tp => compilation.ObjectType);
this.TypeMemberType = inferredType.SubstituteTypes(mapping, compilation);
var availableTypeParameters = this.TypeToGenerateIn.GetAllTypeParameters();
this.TypeMemberType = TypeMemberType.RemoveUnavailableTypeParameters(
compilation, availableTypeParameters);
var enclosingMethodSymbol = document.SemanticModel.GetEnclosingSymbol <IMethodSymbol>(this.SimpleNameOrMemberAccessExpressionOpt.SpanStart, cancellationToken);
if (enclosingMethodSymbol != null && enclosingMethodSymbol.TypeParameters != null && enclosingMethodSymbol.TypeParameters.Length != 0)
{
var combinedTypeParameters = new List <ITypeParameterSymbol>();
combinedTypeParameters.AddRange(availableTypeParameters);
combinedTypeParameters.AddRange(enclosingMethodSymbol.TypeParameters);
this.LocalType = inferredType.RemoveUnavailableTypeParameters(
compilation, combinedTypeParameters);
}
else
{
this.LocalType = this.TypeMemberType;
}
}
private void DetermineFieldType(
SemanticDocument document,
CancellationToken cancellationToken)
{
var inferredType = TypeGuessing.typeInferenceService.InferType(
document.SemanticModel, this.SimpleNameOrMemberAccessExpressionOpt,
objectAsDefault: true,
cancellationToken: cancellationToken);
inferredType = inferredType.SpecialType == SpecialType.System_Void
? document.SemanticModel.Compilation.ObjectType
: inferredType;
if (this.IsInConditionalAccessExpression)
{
inferredType = inferredType.RemoveNullableIfPresent();
}
// Substitute 'object' for all captured method type parameters. Note: we may need to
// do this for things like anonymous types, as well as captured type parameters that
// aren't in scope in the destination type.
var capturedMethodTypeParameters = inferredType.GetReferencedMethodTypeParameters();
var mapping = capturedMethodTypeParameters.ToDictionary(tp => tp,
tp => document.SemanticModel.Compilation.ObjectType);
this.TypeMemberType = inferredType.SubstituteTypes(mapping, document.SemanticModel.Compilation);
var availableTypeParameters = this.TypeToGenerateIn.GetAllTypeParameters();
this.TypeMemberType = TypeMemberType.RemoveUnavailableTypeParameters(
document.SemanticModel.Compilation, availableTypeParameters);
var enclosingMethodSymbol = document.SemanticModel.GetEnclosingSymbol <IMethodSymbol>(this.SimpleNameOrMemberAccessExpressionOpt.SpanStart, cancellationToken);
if (enclosingMethodSymbol != null && enclosingMethodSymbol.TypeParameters != null && enclosingMethodSymbol.TypeParameters.Count() != 0)
{
var combinedTypeParameters = new List <ITypeParameterSymbol>();
combinedTypeParameters.AddRange(availableTypeParameters);
combinedTypeParameters.AddRange(enclosingMethodSymbol.TypeParameters);
this.LocalType = inferredType.RemoveUnavailableTypeParameters(
document.SemanticModel.Compilation, combinedTypeParameters);
}
else
{
this.LocalType = this.TypeMemberType;
}
}