public override Accessibility VisitFunctionPointerType(
IFunctionPointerTypeSymbol symbol
)
{
var accessibility = symbol.DeclaredAccessibility;
accessibility = AccessibilityUtilities.Minimum(
accessibility,
symbol.Signature.ReturnType.Accept(this)
);
foreach (var parameter in symbol.Signature.Parameters)
{
accessibility = AccessibilityUtilities.Minimum(
accessibility,
parameter.Type.Accept(this)
);
}
// CallingConvention types are currently specced to always be public, but if that spec ever changes
// or the runtime creates special private types for it's own use, we'll be ready.
foreach (
var callingConventionType in symbol.Signature.UnmanagedCallingConventionTypes
)
{
accessibility = AccessibilityUtilities.Minimum(
accessibility,
callingConventionType.Accept(this)
);
}
return(accessibility);
}
public override ITypeSymbol VisitFunctionPointerType(IFunctionPointerTypeSymbol symbol)
{
// TODO(https://github.com/dotnet/roslyn/issues/43890): function pointers could theoretically
// have a parameter of an anonymous type if you have a generic function that returns function
// pointers, and that was called with an anonymous type.
return(symbol);
}
public static void Create(IFunctionPointerTypeSymbol symbol, SymbolKeyWriter visitor)
{
visitor.WriteRefKind(symbol.Signature.RefKind);
visitor.WriteSymbolKey(symbol.Signature.ReturnType);
visitor.WriteRefKindArray(symbol.Signature.Parameters);
visitor.WriteParameterTypesArray(symbol.Signature.Parameters);
}
public override void VisitFunctionPointerType(IFunctionPointerTypeSymbol symbol)
{
symbol.Signature.ReturnType.Accept(this);
foreach (var param in symbol.Signature.Parameters)
{
param.Type.Accept(this);
}
}
public override bool VisitFunctionPointerType(IFunctionPointerTypeSymbol symbol)
{
if (!_visited.Add(symbol))
{
return(false);
}
return(true);
}
public override TypeSyntax VisitFunctionPointerType(IFunctionPointerTypeSymbol symbol)
{
// TODO(https://github.com/dotnet/roslyn/issues/39865): generate the calling convention once exposed through the API
var parameters = symbol.Signature.Parameters.Select(p => (p.Type, RefKindModifiers: CSharpSyntaxGenerator.GetParameterModifiers(p.RefKind)))
.Concat(SpecializedCollections.SingletonEnumerable((
Type: symbol.Signature.ReturnType,
RefKindModifiers: CSharpSyntaxGenerator.GetParameterModifiers(symbol.Signature.RefKind, forFunctionPointerReturnParameter: true))))
.SelectAsArray(t => SyntaxFactory.Parameter(SyntaxFactory.MissingToken(SyntaxKind.IdentifierToken)).WithModifiers(t.RefKindModifiers).WithType(t.Type.GenerateTypeSyntax()));
return(AddInformationTo(
SyntaxFactory.FunctionPointerType(SyntaxFactory.SeparatedList(parameters)), symbol));
}
public override void VisitFunctionPointerType(IFunctionPointerTypeSymbol symbol)
{
if (!_visited.Add(symbol))
{
return;
}
foreach (var parameter in symbol.Signature.Parameters)
{
parameter.Type.Accept(this);
}
symbol.Signature.ReturnType.Accept(this);
}
public static void Create(IFunctionPointerTypeSymbol symbol, SymbolKeyWriter visitor)
{
var callingConvention = symbol.Signature.CallingConvention;
visitor.WriteInteger((int)callingConvention);
if (callingConvention == SignatureCallingConvention.Unmanaged)
{
visitor.WriteSymbolKeyArray(symbol.Signature.UnmanagedCallingConventionTypes);
}
visitor.WriteRefKind(symbol.Signature.RefKind);
visitor.WriteSymbolKey(symbol.Signature.ReturnType);
visitor.WriteRefKindArray(symbol.Signature.Parameters);
visitor.WriteParameterTypesArray(symbol.Signature.Parameters);
}
public override void VisitFunctionPointerType(IFunctionPointerTypeSymbol symbol)
{
Append("delegate*");
var signature = symbol.Signature;
if (signature.CallingConvention != SignatureCallingConvention.Default)
{
Append(" unmanaged");
if ((signature.CallingConvention != SignatureCallingConvention.Unmanaged) || (signature.UnmanagedCallingConventionTypes.Length != 0))
{
Append("[");
if (signature.UnmanagedCallingConventionTypes.Length != 0)
{
WriteUnmanagedCallConv(signature.UnmanagedCallingConventionTypes[0]);
for (int i = 1; i < signature.UnmanagedCallingConventionTypes.Length; i++)
{
Append(", ");
WriteUnmanagedCallConv(signature.UnmanagedCallingConventionTypes[i]);
}
}
else
{
WriteUnmanagedCallConv(signature.CallingConvention);
}
Append("]");
}
}
Append("<");
foreach (var parameter in signature.Parameters)
{
WriteRefKind(parameter.RefKind, isReturn: false);
parameter.Type.Accept(this);
Append(", ");
}
WriteRefKind(signature.RefKind, isReturn: true);
signature.ReturnType.Accept(this);
Append(">");
}
private static IList <SignatureHelpItem> GetFunctionPointerInvokeItems(
InvocationExpressionSyntax invocationExpression,
SemanticModel semanticModel,
IAnonymousTypeDisplayService anonymousTypeDisplayService,
IDocumentationCommentFormattingService documentationCommentFormattingService,
IFunctionPointerTypeSymbol functionPointerType,
out int?selectedItem,
CancellationToken cancellationToken
)
{
return(GetDelegateOrFunctionPointerInvokeItems(
invocationExpression,
functionPointerType.Signature,
semanticModel,
anonymousTypeDisplayService,
documentationCommentFormattingService,
out selectedItem,
cancellationToken
));
}
public override IEntity VisitFunctionPointerType(IFunctionPointerTypeSymbol symbol) => FunctionPointerType.Create(cx, symbol);
public virtual TResult?VisitFunctionPointerType(IFunctionPointerTypeSymbol symbol)
{
return(DefaultVisit(symbol));
}
public virtual void VisitFunctionPointerType(IFunctionPointerTypeSymbol symbol)
{
DefaultVisit(symbol);
}
public override ITypeSymbol VisitFunctionPointerType(IFunctionPointerTypeSymbol symbol)
{
// TODO(https://github.com/dotnet/roslyn/issues/43890): implement this
return(symbol);
}
public override void VisitFunctionPointerType(IFunctionPointerTypeSymbol symbol)
{
base.VisitFunctionPointerType(symbol);
}
public override INamedTypeSymbol?VisitFunctionPointerType(IFunctionPointerTypeSymbol symbol) => null;
public override int VisitFunctionPointerType(IFunctionPointerTypeSymbol symbol, StringBuilder argument)
{
return(base.VisitFunctionPointerType(symbol, argument));
}
public override ITypeSymbol VisitFunctionPointerType(IFunctionPointerTypeSymbol symbol)
{
// TODO(https://github.com/dotnet/roslyn/issues/43890): also visit the underlying types of
// the parameters and return value
return(VisitType(symbol));
}
public override void VisitFunctionPointerType(IFunctionPointerTypeSymbol symbol)
{
VisitMethod(symbol.Signature);
}
public virtual TResult VisitFunctionPointerType(IFunctionPointerTypeSymbol symbol, TArgument argument)
{
return(DefaultVisit(symbol, argument));
}
public override void VisitFunctionPointerType(IFunctionPointerTypeSymbol symbol)
{
ReferenceItem.Parts[SyntaxLanguage.VB].Add(new LinkItem
{
DisplayName = "delegate*",
DisplayNamesWithType = "delegate*",
DisplayQualifiedNames = "delegate*",
});
var signature = symbol.Signature;
if (signature.CallingConvention != SignatureCallingConvention.Default)
{
ReferenceItem.Parts[SyntaxLanguage.VB].Add(new LinkItem
{
DisplayName = "unmanaged",
DisplayNamesWithType = "unmanaged",
DisplayQualifiedNames = "unmanaged",
});
if ((signature.CallingConvention != SignatureCallingConvention.Unmanaged) || (signature.UnmanagedCallingConventionTypes.Length != 0))
{
ReferenceItem.Parts[SyntaxLanguage.VB].Add(new LinkItem
{
DisplayName = " [",
DisplayNamesWithType = " [",
DisplayQualifiedNames = " [",
});
if (signature.UnmanagedCallingConventionTypes.Length != 0)
{
for (int i = 0; i < signature.UnmanagedCallingConventionTypes.Length; i++)
{
if (i > 0)
{
ReferenceItem.Parts[SyntaxLanguage.VB].Add(new LinkItem
{
DisplayName = ", ",
DisplayNamesWithType = ", ",
DisplayQualifiedNames = ", ",
});
}
signature.UnmanagedCallingConventionTypes[i].Accept(this);
}
}
else
{
ReferenceItem.Parts[SyntaxLanguage.VB].Add(new LinkItem
{
DisplayName = signature.CallingConvention.ToString(),
DisplayNamesWithType = signature.CallingConvention.ToString(),
DisplayQualifiedNames = signature.CallingConvention.ToString(),
});
}
ReferenceItem.Parts[SyntaxLanguage.VB].Add(new LinkItem
{
DisplayName = "]",
DisplayNamesWithType = "]",
DisplayQualifiedNames = "]",
});
}
}
ReferenceItem.Parts[SyntaxLanguage.VB].Add(new LinkItem
{
DisplayName = "<",
DisplayNamesWithType = "<",
DisplayQualifiedNames = "<",
});
foreach (var parameter in signature.Parameters)
{
parameter.Type.Accept(this);
ReferenceItem.Parts[SyntaxLanguage.VB].Add(new LinkItem
{
DisplayName = ", ",
DisplayNamesWithType = ", ",
DisplayQualifiedNames = ", ",
});
}
signature.ReturnType.Accept(this);
ReferenceItem.Parts[SyntaxLanguage.VB].Add(new LinkItem
{
DisplayName = ">",
DisplayNamesWithType = ">",
DisplayQualifiedNames = ">",
});
}
