override public void Visit(AST_unary_operator unary_operator)
{
base.Visit(unary_operator);
if (unary_operator.Operand.DataType != bool_type)
{
Error("Unary operator '!' requires a bool operand.", unary_operator);
}
unary_operator.DataType = bool_type;
}
private AST_unary_operator Parse_unary_operator_operand(TokenKind followSet)
{
IncrementDepth();
Token t = LookAheadToken();
AST_unary_operator unary_operator;
DebugPrint("unary_op_opnd");
Match(Exclamation);
unary_operator = new AST_unary_operator(Parse_operand(followSet));
unary_operator.Row = t.Row;
unary_operator.Column = t.Column;
DecrementDepth();
return(unary_operator);
}
override public void Visit(AST_unary_operator unary_operator)
{
unary_operator.Operand.Accept(this);
value.Set(!value.BoolValue);
}
public virtual void Visit(AST_unary_operator unary_operator)
{
IncrementDepth();
unary_operator.Operand.Accept(this);
DecrementDepth();
}
