private Expr ParseLambda()
{
Span prev = CurrentSpan();
Consume(TokenType.Backslash);
List <Expr.Variable> args = new List <Expr.Variable> {
ParseVar()
};
while (!IsAtEnd() && Check(TokenType.Ident))
{
args.Add(ParseVar());
}
Consume(TokenType.Arrow);
Expr e = ParseExpr();
Span lambdaSpan = prev.Combine(e.Span);
Expr final = new Expr.Lambda(args.Last(), e, lambdaSpan);
args.RemoveAt(args.Count - 1);
for (int i = args.Count - 1; i >= 0; i--)
{
final = new Expr.Lambda(args[i], final, lambdaSpan);
}
return(final);
}
public string Visit(Expr.Lambda lam)
{
return(MakeParend("lam", lam.Arg, lam.Body));
}
