private void InterpretExtendExpression(ExtendExpression expression)
{
var obj = InterpretObjectExpression(expression.Object);
TypeExtender.Extend(this, expression.Type, obj);
}
private object InterpretMemberExpression(BinaryOperatorExpression expression, bool returnRef = false)
{
var obj = InterpretExpression(expression.LeftOperand) as AphidObject;
string key;
if (expression.RightOperand is IdentifierExpression)
{
key = (expression.RightOperand as IdentifierExpression).Identifier;
}
else if (expression.RightOperand is StringExpression)
{
key = (string)ValueHelper.Unwrap(InterpretStringExpression(expression.RightOperand as StringExpression));
}
else if (expression.RightOperand is DynamicMemberExpression)
{
var memberExp = expression.RightOperand as DynamicMemberExpression;
key = ValueHelper.Unwrap(InterpretExpression(memberExp.MemberExpression)).ToString();
}
else
{
throw new AphidRuntimeException("Unexpected expression {0}", expression.RightOperand);
}
if (returnRef)
{
return(new AphidRef()
{
Name = key, Object = obj
});
}
else
{
AphidObject val;
if (obj == null)
{
throw new AphidRuntimeException("Undefined member {0} in expression {1}",
expression.LeftOperand,
expression);
}
else if (!obj.TryResolve(key, out val))
{
var t = obj.GetValueType();
var extKey = TypeExtender.GetName(t, key);
if (!_currentScope.TryResolve(extKey, out val))
{
throw new AphidRuntimeException("Undefined member {0} in expression {1}", key, expression);
}
var function = ((AphidFunction)val.Value).Clone();
function.ParentScope = new AphidObject {
Parent = _currentScope
};
function.ParentScope.Add(function.Args[0], obj);
function.Args = function.Args.Skip(1).ToArray();
val = new AphidObject(function);
}
return(val);
}
}
