private IExpression Index(IAstNode operand, AstNodeCollection arguments)
{
var resolvedArguments = ResolveArguments(arguments);
var resolvedOperand = operand.Accept(this);
if (resolvedOperand.Type.IsArray)
{
if (resolvedArguments.Length != resolvedOperand.Type.GetArrayRank())
{
throw new ExpressionsException(
"Invalid array index rank",
ExpressionsExceptionType.TypeMismatch
);
}
foreach (var argument in resolvedArguments)
{
if (!TypeUtil.IsCastAllowed(argument.Type, typeof(int)))
{
throw new ExpressionsException(
"Argument of array index must be convertable to integer",
ExpressionsExceptionType.TypeMismatch
);
}
}
if (resolvedArguments.Length == 1)
{
return(new Expressions.Index(resolvedOperand, resolvedArguments[0], resolvedOperand.Type.GetElementType()));
}
else
{
return(_resolver.ResolveMethod(resolvedOperand, "Get", resolvedArguments));
}
}
var defaultMemberAttributes = resolvedOperand.Type.GetCustomAttributes(typeof(DefaultMemberAttribute), true);
if (defaultMemberAttributes.Length != 1)
{
throw new ExpressionsException(
"Operand does not support indexing",
ExpressionsExceptionType.TypeMismatch
);
}
var result = _resolver.ResolveMethod(resolvedOperand, "get_" + ((DefaultMemberAttribute)defaultMemberAttributes[0]).MemberName, resolvedArguments);
if (result == null)
{
throw new ExpressionsException(
"Unresolved index method",
ExpressionsExceptionType.UnresolvedMethod
);
}
return(result);
}
