//(expr )? expr2 : expr3
private Expr Ternary()
{
var expr = Equality();
while (Match(QUESTION))
{
var expr2 = Expression();
var token = Consume(SEMICOLON, " Conditional missing ':' operator");
var expr3 = Ternary();
expr = new Expr.Ternary(expr, expr2, expr3);
}
return(expr);
}
/// <summary>
/// ternary -> equality ("?" expression ":" ternary)?
/// </summary>
/// <returns></returns>
private Expr Ternary()
{
Expr expr = this.Equality();
if (match(QUESTION))
{
Expr thenC = this.Expression();
Consume(COLON, "Expect ':' and yet none was forth coming");
Expr elseBranch = Ternary();
expr = new Expr.Ternary(expr, thenC, elseBranch);
}
return(expr);
}
public string VisitTernary(Expr.Ternary expr) => Parenthesize("conditional", expr.cond, expr.@true, expr.@false);
public string VisitTernaryExpr(Expr.Ternary expr) => $"({expr.Expression.Accept(this)} ? {expr.IfTrue.Accept(this)} : {expr.IfFalse.Accept(this)})";
public string VisitTernary(Expr.Ternary expr) => Printer("conditional", expr.cond, expr.@true, expr.@false);
