getopt & single-letter options with parameters

[Adrian Matoga]

On 2010-08-08 01:22, Andrei Alexandrescu wrote:
> On 08/07/2010 05:55 PM, Adrian Matoga wrote:
>> Hi,
>>
>> Is it by design that single-letter option needs to be glued to its
>> argument, like "-ofilename", or is it a bug in implementation?
>>
>> Source:
>>
>> import std.stdio;
>> import std.getopt;
>>
>> void main(string[] args)
>> {
>> string outputFile;
>> getopt(args,
>> config.passThrough,
>> "o|output-filename", &outputFile);
>> writeln(args);
>> writeln("'" ~ outputFile ~ "'");
>> }
>>
>>
>>
>> Results:
>>  >test.exe -o somename
>> test.exe somename
>> ''
>>
>>  >test.exe -osomename
>> test.exe
>> 'somename'
>>
>> Regards,
>> Adrian Matoga
> 
> It's by design in order to avoid confusion with parameterless options. 
> Your example works with either of these invocations:
> 
> ./prog -ofilename
> ./prog -o=filename
> ./prog --o=filename
> 
> but not others.
> 
> 
> Andrei

Thanks very much.
I suggest adding this info to official docs (it's not obvious, and a bit 
confusing, since long options work with whitespace(s)).

Adrian