private Expr Conditional()
{
Expr expression = Equality();
if (Match(TokenType.Question))
{
Expr thenBranch = Expression();
Consume(TokenType.Colon, "Expect ':' after then branch of conditional expression.");
Expr elseBranch = Conditional();
expression = new Expr.Conditional(expression, thenBranch, elseBranch);
}
return(expression);
}
string Expr.IVisitor <string> .Visit(Expr.Conditional conditional)
{
return(Parenthesize("Conditional", conditional.thenBranch, conditional.elseBranch));
}
public object Visit(Expr.Conditional _conditional)
{
return(null);
}
public object Visit(Expr.Conditional conditional)
{
throw new NotImplementedException();
}