private async Task <bool> TryInitializeAsync(
TService service,
SemanticDocument document,
SyntaxNode node,
CancellationToken cancellationToken)
{
if (!(node is TSimpleNameSyntax))
{
return(false);
}
this.SimpleName = (TSimpleNameSyntax)node;
var syntaxFacts = document.Project.LanguageServices.GetService <ISyntaxFactsService>();
syntaxFacts.GetNameAndArityOfSimpleName(this.SimpleName, out var name, out var arity);
this.Name = name;
this.NameIsVerbatim = syntaxFacts.IsVerbatimIdentifier(this.SimpleName.GetFirstToken());
if (string.IsNullOrWhiteSpace(this.Name))
{
return(false);
}
// We only support simple names or dotted names. i.e. "(some + expr).Goo" is not a
// valid place to generate a type for Goo.
if (!service.TryInitializeState(document, this.SimpleName, cancellationToken, out var generateTypeServiceStateOptions))
{
return(false);
}
if (char.IsLower(name[0]) && !document.SemanticModel.Compilation.IsCaseSensitive)
{
// It's near universal in .Net that types start with a capital letter. As such,
// if this name starts with a lowercase letter, don't even bother to offer
// "generate type". The user most likely wants to run 'Add Import' (which will
// then fix up a case where they typed an existing type name in lowercase,
// intending the fix to case correct it).
return(false);
}
this.NameOrMemberAccessExpression = generateTypeServiceStateOptions.NameOrMemberAccessExpression;
this.ObjectCreationExpressionOpt = generateTypeServiceStateOptions.ObjectCreationExpressionOpt;
var semanticModel = document.SemanticModel;
var info = semanticModel.GetSymbolInfo(this.SimpleName, cancellationToken);
if (info.Symbol != null)
{
// This bound, so no need to generate anything.
return(false);
}
var semanticFacts = document.Project.LanguageServices.GetService <ISemanticFactsService>();
if (!semanticFacts.IsTypeContext(semanticModel, this.NameOrMemberAccessExpression.SpanStart, cancellationToken) &&
!semanticFacts.IsExpressionContext(semanticModel, this.NameOrMemberAccessExpression.SpanStart, cancellationToken) &&
!semanticFacts.IsStatementContext(semanticModel, this.NameOrMemberAccessExpression.SpanStart, cancellationToken) &&
!semanticFacts.IsNameOfContext(semanticModel, this.NameOrMemberAccessExpression.SpanStart, cancellationToken) &&
!semanticFacts.IsNamespaceContext(semanticModel, this.NameOrMemberAccessExpression.SpanStart, cancellationToken))
{
return(false);
}
// If this isn't something that can be created, then don't bother offering to create
// it.
if (info.CandidateReason == CandidateReason.NotCreatable)
{
return(false);
}
if (info.CandidateReason == CandidateReason.Inaccessible ||
info.CandidateReason == CandidateReason.NotReferencable ||
info.CandidateReason == CandidateReason.OverloadResolutionFailure)
{
// We bound to something inaccessible, or overload resolution on a
// constructor call failed. Don't want to offer GenerateType here.
return(false);
}
if (this.ObjectCreationExpressionOpt != null)
{
// If we're new'ing up something illegal, then don't offer generate type.
var typeInfo = semanticModel.GetTypeInfo(this.ObjectCreationExpressionOpt, cancellationToken);
if (typeInfo.Type.IsModuleType())
{
return(false);
}
}
await DetermineNamespaceOrTypeToGenerateInAsync(service, document, cancellationToken).ConfigureAwait(false);
// Now, try to infer a possible base type for this new class/interface.
this.InferBaseType(service, document, cancellationToken);
this.IsInterface = GenerateInterface(service, cancellationToken);
this.IsStruct = GenerateStruct(service, semanticModel, cancellationToken);
this.IsAttribute = this.BaseTypeOrInterfaceOpt != null && this.BaseTypeOrInterfaceOpt.Equals(semanticModel.Compilation.AttributeType());
this.IsException = this.BaseTypeOrInterfaceOpt != null && this.BaseTypeOrInterfaceOpt.Equals(semanticModel.Compilation.ExceptionType());
this.IsMembersWithModule = generateTypeServiceStateOptions.IsMembersWithModule;
this.IsTypeGeneratedIntoNamespaceFromMemberAccess = generateTypeServiceStateOptions.IsTypeGeneratedIntoNamespaceFromMemberAccess;
this.IsInterfaceOrEnumNotAllowedInTypeContext = generateTypeServiceStateOptions.IsInterfaceOrEnumNotAllowedInTypeContext;
this.IsDelegateAllowed = generateTypeServiceStateOptions.IsDelegateAllowed;
this.IsDelegateOnly = generateTypeServiceStateOptions.IsDelegateOnly;
this.IsEnumNotAllowed = generateTypeServiceStateOptions.IsEnumNotAllowed;
this.DelegateMethodSymbol = generateTypeServiceStateOptions.DelegateCreationMethodSymbol;
this.IsClassInterfaceTypes = generateTypeServiceStateOptions.IsClassInterfaceTypes;
this.IsSimpleNameGeneric = service.IsGenericName(this.SimpleName);
this.PropertiesToGenerate = generateTypeServiceStateOptions.PropertiesToGenerate;
if (this.IsAttribute && this.TypeToGenerateInOpt.GetAllTypeParameters().Any())
{
this.TypeToGenerateInOpt = null;
}
return(this.TypeToGenerateInOpt != null || this.NamespaceToGenerateInOpt != null);
}
private bool TryInitialize(
TService service,
SemanticDocument document,
SyntaxNode node,
CancellationToken cancellationToken)
{
if (!(node is TSimpleNameSyntax))
{
return(false);
}
this.SimpleName = (TSimpleNameSyntax)node;
string name;
int arity;
var syntaxFacts = document.Project.LanguageServices.GetService <ISyntaxFactsService>();
syntaxFacts.GetNameAndArityOfSimpleName(this.SimpleName, out name, out arity);
this.Name = name;
this.NameIsVerbatim = syntaxFacts.IsVerbatimIdentifier(this.SimpleName.GetFirstToken());
if (string.IsNullOrWhiteSpace(this.Name))
{
return(false);
}
// We only support simple names or dotted names. i.e. "(some + expr).Foo" is not a
// valid place to generate a type for Foo.
GenerateTypeServiceStateOptions generateTypeServiceStateOptions;
if (!service.TryInitializeState(document, this.SimpleName, cancellationToken, out generateTypeServiceStateOptions))
{
return(false);
}
this.NameOrMemberAccessExpression = generateTypeServiceStateOptions.NameOrMemberAccessExpression;
this.ObjectCreationExpressionOpt = generateTypeServiceStateOptions.ObjectCreationExpressionOpt;
var semanticModel = document.SemanticModel;
var info = semanticModel.GetSymbolInfo(this.SimpleName, cancellationToken);
if (info.Symbol != null)
{
// This bound, so no need to generate anything.
return(false);
}
var semanticFacts = document.Project.LanguageServices.GetService <ISemanticFactsService>();
if (!semanticFacts.IsTypeContext(semanticModel, this.NameOrMemberAccessExpression.SpanStart, cancellationToken) &&
!semanticFacts.IsExpressionContext(semanticModel, this.NameOrMemberAccessExpression.SpanStart, cancellationToken) &&
!semanticFacts.IsStatementContext(semanticModel, this.NameOrMemberAccessExpression.SpanStart, cancellationToken) &&
!semanticFacts.IsNameOfContext(semanticModel, this.NameOrMemberAccessExpression.SpanStart, cancellationToken) &&
!semanticFacts.IsNamespaceContext(semanticModel, this.NameOrMemberAccessExpression.SpanStart, cancellationToken))
{
return(false);
}
// If this isn't something that can be created, then don't bother offering to create
// it.
if (info.CandidateReason == CandidateReason.NotCreatable)
{
return(false);
}
if (info.CandidateReason == CandidateReason.Inaccessible ||
info.CandidateReason == CandidateReason.NotReferencable ||
info.CandidateReason == CandidateReason.OverloadResolutionFailure)
{
// We bound to something inaccessible, or overload resolution on a
// constructor call failed. Don't want to offer GenerateType here.
return(false);
}
if (this.ObjectCreationExpressionOpt != null)
{
// If we're new'ing up something illegal, then don't offer generate type.
var typeInfo = semanticModel.GetTypeInfo(this.ObjectCreationExpressionOpt, cancellationToken);
if (typeInfo.Type.IsModuleType())
{
return(false);
}
}
DetermineNamespaceOrTypeToGenerateIn(service, document, cancellationToken);
// Now, try to infer a possible base type for this new class/interface.
this.InferBaseType(service, document, cancellationToken);
this.IsInterface = GenerateInterface(service, cancellationToken);
this.IsStruct = GenerateStruct(service, semanticModel, cancellationToken);
this.IsAttribute = this.BaseTypeOrInterfaceOpt != null && this.BaseTypeOrInterfaceOpt.Equals(semanticModel.Compilation.AttributeType());
this.IsException = this.BaseTypeOrInterfaceOpt != null && this.BaseTypeOrInterfaceOpt.Equals(semanticModel.Compilation.ExceptionType());
this.IsMembersWithModule = generateTypeServiceStateOptions.IsMembersWithModule;
this.IsTypeGeneratedIntoNamespaceFromMemberAccess = generateTypeServiceStateOptions.IsTypeGeneratedIntoNamespaceFromMemberAccess;
this.IsInterfaceOrEnumNotAllowedInTypeContext = generateTypeServiceStateOptions.IsInterfaceOrEnumNotAllowedInTypeContext;
this.IsDelegateAllowed = generateTypeServiceStateOptions.IsDelegateAllowed;
this.IsDelegateOnly = generateTypeServiceStateOptions.IsDelegateOnly;
this.IsEnumNotAllowed = generateTypeServiceStateOptions.IsEnumNotAllowed;
this.DelegateMethodSymbol = generateTypeServiceStateOptions.DelegateCreationMethodSymbol;
this.IsClassInterfaceTypes = generateTypeServiceStateOptions.IsClassInterfaceTypes;
this.IsSimpleNameGeneric = service.IsGenericName(this.SimpleName);
this.PropertiesToGenerate = generateTypeServiceStateOptions.PropertiesToGenerate;
if (this.IsAttribute && this.TypeToGenerateInOpt.GetAllTypeParameters().Any())
{
this.TypeToGenerateInOpt = null;
}
return(this.TypeToGenerateInOpt != null || this.NamespaceToGenerateInOpt != null);
}