internal static object GetNew(Type type)
{
Func <object> del;
if (Ctors.TryGetValue(type, out del))
{
return(del());
}
if (type.HasDefaultConstructor())
{
Expression @new = Expression.New(type);
if (type.IsValueType) //lambda won't box by default, which is required for value types.
{
@new = Expression.Convert(@new, typeof(object));
}
del = (Func <object>)Expression.Lambda(typeof(Func <object>), @new).Compile();
}
else
{
del = () => null;
}
Ctors[type] = del;
return(del());
}
internal static ContentMatchExpression CreateContentMatchExpression(ContentToken token)
{
string header = token.Content.Substring(0, token.Content.IndexOf(':') + 1);
if (string.IsNullOrWhiteSpace(header))
{
return(new TextMatchExpression(token));
}
else
{
Func <ContentToken, ContentMatchExpression> ctor;
if (Ctors.TryGetValue(header, out ctor))
{
return(ctor(token));
}
else
{
return(new TextMatchExpression(token));
}
}
}