public static ExtensionMethodInfo GetExtensionMethodInfo(
this SemanticModel semanticModel,
ExpressionSyntax expression,
ExtensionMethodKind allowedKinds,
CancellationToken cancellationToken = default(CancellationToken))
{
ISymbol symbol = GetSymbol(semanticModel, expression, cancellationToken);
if (symbol?.IsMethod() == true)
{
return(ExtensionMethodInfo.Create((IMethodSymbol)symbol, semanticModel, allowedKinds));
}
else
{
return(default(ExtensionMethodInfo));
}
}
public static bool TryGetExtensionMethodInfo(
this SemanticModel semanticModel,
ExpressionSyntax expression,
out MethodInfo methodInfo,
ExtensionMethodKind kind = ExtensionMethodKind.None,
CancellationToken cancellationToken = default(CancellationToken))
{
ISymbol symbol = semanticModel.GetSymbol(expression, cancellationToken);
if (symbol?.IsMethod() == true &&
ExtensionMethodInfo.TryCreate((IMethodSymbol)symbol, semanticModel, out ExtensionMethodInfo extensionMethodInfo, kind))
{
methodInfo = extensionMethodInfo.MethodInfo;
return(true);
}
methodInfo = default(MethodInfo);
return(false);
}
internal static ExtensionMethodInfo Create(IMethodSymbol methodSymbol, SemanticModel semanticModel, ExtensionMethodKind allowedKinds)
{
if (methodSymbol == null)
{
throw new ArgumentNullException(nameof(methodSymbol));
}
if (semanticModel == null)
{
throw new ArgumentNullException(nameof(semanticModel));
}
if (methodSymbol.IsExtensionMethod)
{
IMethodSymbol reducedFrom = methodSymbol.ReducedFrom;
if (reducedFrom != null)
{
if ((allowedKinds & ExtensionMethodKind.Reduced) != 0)
{
return(new ExtensionMethodInfo(methodSymbol, reducedFrom, semanticModel));
}
}
else if ((allowedKinds & ExtensionMethodKind.Ordinary) != 0)
{
return(new ExtensionMethodInfo(methodSymbol, methodSymbol, semanticModel));
}
}
return(default(ExtensionMethodInfo));
}
public static bool TryCreate(IMethodSymbol methodSymbol, SemanticModel semanticModel, out ExtensionMethodInfo extensionMethodInfo, ExtensionMethodKind kind = ExtensionMethodKind.None)
{
if (methodSymbol?.IsExtensionMethod == true)
{
IMethodSymbol reducedFrom = methodSymbol.ReducedFrom;
if (reducedFrom != null)
{
if (kind != ExtensionMethodKind.NonReduced)
{
extensionMethodInfo = new ExtensionMethodInfo(reducedFrom, methodSymbol, semanticModel);
return(true);
}
}
else if (kind != ExtensionMethodKind.Reduced)
{
extensionMethodInfo = new ExtensionMethodInfo(methodSymbol, null, semanticModel);
return(true);
}
}
extensionMethodInfo = default(ExtensionMethodInfo);
return(false);
}
