public override bool VisitLiteral([NotNull] calculatorParser.LiteralContext context)
{
if (context.children != null)
{
foreach (var c in context.children)
{
if (!Visit(c))
{
Results[context] = false;
return(false);
}
}
}
Results[context] = true;
return(true);
}
public override Expression VisitLiteral([NotNull] calculatorParser.LiteralContext context)
{
if (context.children != null)
{
foreach (IParseTree c in context.children)
{
Visit(c);
}
}
var child = context.children[0];
if (child is TerminalNodeImpl)
{
TerminalNodeImpl c2 = child as TerminalNodeImpl;
IToken sym = c2.Symbol;
int type = sym.Type;
switch (type)
{
case calculatorParser.REAL_LITERAL:
try
{
string str = context.GetText();
double val = Convert.ToDouble(str);
Expression result = Expression.Constant((double)val, typeof(double));
Results[context] = result;
return(result);
}
catch (Exception)
{
}
return(null);
case calculatorParser.INTEGER_LITERAL:
try
{
string str = context.GetText();
int val = Convert.ToInt32(str);
Expression result = Expression.Constant((double)val, typeof(double));
Results[context] = result;
return(result);
}
catch (Exception)
{
}
return(null);
case calculatorParser.TRUE:
{
Expression result = Expression.Constant(true, typeof(bool));
Results[context] = result;
return(result);
}
case calculatorParser.FALSE:
{
Expression result = Expression.Constant(false, typeof(bool));
Results[context] = result;
return(result);
}
default:
{
Expression result = null;
Results[context] = result;
return(result);
}
}
}
else
{
if (_completeness.Results[context])
{
Expression lhs = Results[context.GetChild(0)];
Results[context] = lhs;
return(lhs);
}
Results[context] = null;
return(null);
}
}
