On Wednesday, 29 April 2015 at 22:02:29 UTC, novice2 wrote:
Hello.
Help me please to understand, how to show usage help to user,
who enter wrong options?
For example, user not provided required filename.
I want to show error message, and program usage help text.
But likely getopt don't provide
Thank you, Brian!
What you're trying to do is currently impossible. I filed a bug
(https://issues.dlang.org/show_bug.cgi?id=14525) because what
you're trying to do really should be possible.
import std.stdio : writefln;
import std.getopt;
void main(string[] args)
{
string fname;
try
{
getopt
Hello.
Help me please to understand, how to show usage help to user, who
enter wrong options?
For example, user not provided required filename.
I want to show error message, and program usage help text.
But likely getopt don't provide help text until valid options
will be parsed.
Reduced cod