public bool Visit(ArrayAccess node)
{
if (node.SymType != null)
{
return(true);
}
node.ArrayIdent.Accept(this);
foreach (var expression in node.AccessExpr)
{
expression.Accept(this);
if (expression.SymType.GetType() != SymbolStack.SymInt.GetType())
{
throw new Exception(string.Format(
"({0}, {1}) semantic error: index '{2}' is not integer",
expression.Token.Line, expression.Token.Line, expression.ToString()));
}
}
if (node.ArrayIdent.SymType == null)
{
throw new Exception(string.Format(
"({0}, {1}) semantic error: array type of expression '{2}' is undeclared",
node.Token.Line, node.Token.Line, node.ToString()));
}
node.SymType = ((SymArrayType)node.ArrayIdent.SymType).ElementSymType;
node.IsLValue = true;
return(true);
}
public AstPrinterNode Visit(ArrayAccess node)
{
var printer = new AstPrinterNode(node.ToString());
printer.AddChild(node.ArrayIdent.Accept(this));
foreach (var expr in node.AccessExpr)
{
printer.AddChild(expr.Accept(this));
}
return(printer);
}