On 9/1/13 10:20 AM, Jacob Carlborg wrote:
On 2013-09-01 16:28, Andrei Alexandrescu wrote:
string outputFile;
getopt(args, "output", &outputFile).min(2).max(4).restrict("a", "b",
"c", "d");
What would this line do?
The "output" argument expects at least two values and at most four. The
values can be "a", "b", "c" or "d".
So output should probably be a string[].
We're looking at:
enforce(output.length >= 2 && output.length <= 4.
"Incorrect number of outputs passed");
enforce(["a", "b", "c", "d"].any(output),
"Invalid value for output");
This is a one-time work per program. Granted, error messages could be
nicer so that's a couple more lines. The gain from integrating such
checks would be small.
Andrei
