[boost] [Boost-bugs] [ boost-Bugs-1685348 ] program_options: long options use prefix only

From: SourceForge.net (noreply_at_[hidden])
Date: 2007-03-21 12:35:30

Bugs item #1685348, was opened at 2007-03-21 12:35
Message generated for change (Tracker Item Submitted) made by Item Submitter
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: goldwynr (goldwynr)
Assigned to: Nobody/Anonymous (nobody)
Summary: program_options: long options use prefix only

Initial Comment:
Using program_options defaults, while scanning for long_options, only the prefix is used.

So long options which begin with the same alphabets result in ambiguous results.

A program which takes --foo(-f), --fool(-l), --fooled(-d) as options currently works like the following:

~/program_options_tests$ ./a.out -f
foo option selected
~/program_options_tests$ ./a.out -l
fool option selected
~/program_options_tests$ ./a.out -d
fooled option selected
~/program_options_tests$ ./a.out --fo
error: ambiguous option fo
~/program_options_tests$ ./a.out --foo
error: ambiguous option foo
~/program_options_tests$ ./a.out --fool
error: ambiguous option fool
~/program_options_tests$ ./a.out --foole
fooled option selected
~/program_options_tests$ ./a.out --fooled
fooled option selected

Expected results:
----------------
./a.out --foo
./a.out --fool
./a.out --fooled 
should have been valid options

./a.out --foole
should have been an invalid option

Actual Results:
--------------
./a.out --foo
./a.out --fool
failed.

./a.out --foole
was accepted as --fooled option.

The program used is attached.

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