public static IdentifierExpression GetDeclaredIdentifier(AphidExpression expression)
{
switch (expression.Type)
{
case AphidExpressionType.ForEachExpression:
var element = expression.ToForEach().Element;
if (element.Type == AphidExpressionType.IdentifierExpression)
{
return(element.ToIdentifier());
}
break;
case AphidExpressionType.BinaryOperatorExpression:
var binOpExp = expression.ToBinaryOperator();
if (binOpExp.Operator == AphidTokenType.AssignmentOperator &&
binOpExp.LeftOperand.Type == AphidExpressionType.IdentifierExpression)
{
return(binOpExp.LeftOperand.ToIdentifier());
}
break;
}
return(null);
}
protected override void Visit(AphidExpression expression)
{
switch (expression.Type)
{
case AphidExpressionType.ForEachExpression:
var element = expression.ToForEach().Element;
if (element.Type == AphidExpressionType.IdentifierExpression)
{
_locals.Add(element.ToIdentifier());
}
break;
case AphidExpressionType.BinaryOperatorExpression:
var binOpExp = expression.ToBinaryOperator();
if (binOpExp.Operator == AphidTokenType.AssignmentOperator &&
binOpExp.LeftOperand.Type == AphidExpressionType.IdentifierExpression)
{
_locals.Add(binOpExp.LeftOperand.ToIdentifier());
}
break;
case AphidExpressionType.FunctionExpression:
IgnoreChildren();
break;
}
}