public override bool VisitUnary_expression([NotNull] calculatorParser.Unary_expressionContext context)
{
if (context.children != null)
{
foreach (var c in context.children)
{
if (!Visit(c))
{
Results[context] = false;
return(false);
}
}
}
if (context.ChildCount == 1)
{
bool lhs = Results[context.GetChild(0)];
Results[context] = lhs;
return(lhs);
}
if (context.ChildCount == 2)
{
bool rhs = Results[context.GetChild(1)];
bool res = rhs;
IParseTree op_pt = context.GetChild(0);
string op = op_pt.GetText();
Results[context] = res;
return(res);
}
{
bool res = false;
Results[context] = res;
return(res);
}
}
public override Expression VisitUnary_expression([NotNull] calculatorParser.Unary_expressionContext context)
{
if (context.children != null)
{
foreach (IParseTree c in context.children)
{
Visit(c);
}
}
if (_completeness.Results[context])
{
if (context.ChildCount == 1)
{
Expression lhs = Results[context.GetChild(0)];
Results[context] = lhs;
return(lhs);
}
if (context.ChildCount == 2)
{
Expression rhs = Results[context.children[1]];
IParseTree op_pt = context.GetChild(0);
string op = op_pt.GetText();
if (op == "+")
{
return(Expression.UnaryPlus(rhs));
}
else if (op == "-")
{
return(Expression.Negate(rhs));
}
}
}
Results[context] = null;
return(null);
}
