/// <summary>
/// Normalizes the <paramref name="argument" />.
/// </summary>
public override SyntaxNode VisitArgument(ArgumentSyntax argument)
{
// Special case for array accesses, as Roslyn doesn't return a symbol for the argument
if (argument.Parent.Parent is ElementAccessExpressionSyntax)
{
var arrayExpression = ((ElementAccessExpressionSyntax)argument.Parent.Parent).Expression;
var kind = SemanticModel.GetTypeInfo(arrayExpression).Type.TypeKind;
if (kind == TypeKind.Array || kind == TypeKind.Pointer)
{
return(base.VisitArgument(argument));
}
}
var parameterSymbol = argument.GetParameterSymbol(SemanticModel);
if (parameterSymbol.RefKind != RefKind.None)
{
return(base.VisitArgument(argument));
}
var arraySymbol = parameterSymbol.Type as IArrayTypeSymbol;
var isParamsFormula = arraySymbol != null && parameterSymbol.IsParams && IsFormulaType(arraySymbol.ElementType);
if (!isParamsFormula && !IsFormulaType(parameterSymbol.Type))
{
return(base.VisitArgument(argument));
}
return(argument.WithExpression(ReplaceImplicitConversion(argument.Expression)));
}
public static bool IsOfType([NotNull] this ArgumentSyntax argument, [NotNull] SemanticModel semanticModel,
[NotNull] ITypeSymbol argumentType)
{
Requires.NotNull(argument, nameof(argument));
Requires.NotNull(semanticModel, nameof(semanticModel));
Requires.NotNull(argumentType, nameof(argumentType));
return(Equals(argument.GetParameterSymbol(semanticModel).Type, argumentType));
}
public static bool HasAttribute <T>([NotNull] this ArgumentSyntax argument, [NotNull] SemanticModel semanticModel)
where T : Attribute
{
Requires.NotNull(argument, nameof(argument));
Requires.NotNull(semanticModel, nameof(semanticModel));
var parameterSymbol = argument.GetParameterSymbol(semanticModel);
return(parameterSymbol.HasAttribute <T>(semanticModel));
}
public static bool IsOfType <T>([NotNull] this ArgumentSyntax argument, [NotNull] SemanticModel semanticModel)
{
Requires.NotNull(argument, nameof(argument));
Requires.NotNull(semanticModel, nameof(semanticModel));
var typeSymbol = semanticModel.GetTypeSymbol <T>();
Requires.That(typeSymbol != null, "Unable to determine type symbol of type '{0}'.", typeof(T).FullName);
return(Equals(argument.GetParameterSymbol(semanticModel).Type, typeSymbol));
}
