// main: expression
void Main()
{
try {
Result = Expression();
} catch (ParserException p) {
Error = p;
}
}
//-----The recursive descent parser bit-----
//return true on success
public bool Parse(List <Token> tokens)
{
Error = null;
Result = null;
if (tokens.Count == 0)
{
return(true);
}
this.tokens = tokens;
pos = 0;
Main();
return(Error == null);
}