public static IExpression GetMvcLiteral <TExpression>([NotNull] IExpression literal,
[CanBeNull] out TExpression expression,
[CanBeNull] out string anonymousPropertyName)
where TExpression : class, IInvocationInfo
{
literal.AssertIsValid("element is not valid");
expression = default(TExpression);
anonymousPropertyName = null;
var argument = literal.GetContainingNode <IArgument>();
if (argument == null)
{
return(default(IExpression));
}
ITreeNode argumentExpression = literal;
// check anonymous objects
var analyzer = LanguageManager.Instance.TryGetService <IAnonymousObjectsAnalyser>(literal.Language);
if (analyzer != null)
{
var anonymousExpression =
literal.GetContainingNode <ITreeNode>(element => analyzer.IsCreationExpression(element));
if (anonymousExpression != null)
{
Pair <string, IManagedExpression> memberInitializer =
analyzer.GetMemberInitializers(anonymousExpression)
.FirstOrDefault(pair => ReferenceEquals(pair.Second, literal));
if (ReferenceEquals(memberInitializer.Second, literal))
{
anonymousPropertyName = memberInitializer.First;
argumentExpression = anonymousExpression;
}
}
}
if (argument.Expression != argumentExpression)
{
return(default(IExpression));
}
if (argument.Invocation is TExpression)
{
expression = (TExpression)argument.Invocation;
}
// return literal only if expression is suitable (not null and not internal generated)
return(expression == null ? default(IExpression) : literal);
}