Boost C++ Libraries: Ticket #5654: Example parse_config_file missing template parameter

Tue, 04 Oct 2011 16:10:27 GMT

parse_config_file appears to require an open istream object (instead of the filename). I think this is a documentation error?

Tue, 04 Oct 2011 16:51:47 GMT

Both overloads are available.

Tue, 04 Oct 2011 18:26:45 GMT

Ah - perhaps this is a bug in 4.2? The "const char*" overload does not resolve on my system - boost1.42-all-dev on Ubuntu Lucid using g++ 4.4.3.

Tue, 04 Oct 2011 18:36:33 GMT

4.2? Try 1.47.

Tue, 04 Oct 2011 18:56:19 GMT

Replying to Olaf van der Spek <olafvdspek@…>:

4.2? Try 1.47.

Sorry - I meant 1.42, but 1.47 is not readily available for me (as in not packaged in backports), and since the workaraound is acceptable, and the project late (as ever), I won't get around to this I am afraid. I can confirm that it does not work with an extra (true or false) template parameter either. But I guess bugs for 1.42 are somewhat irrelevant at this stage.

Tue, 04 Oct 2011 18:57:44 GMT

Maybe (probably) this feature was added after 1.42.

Tue, 04 Oct 2011 19:04:55 GMT

It is declared in the header I have.

    template<class charT>
#if ! BOOST_WORKAROUND(__ICL, BOOST_TESTED_AT(700))
    BOOST_PROGRAM_OPTIONS_DECL
#endif
    basic_parsed_options<charT>
    parse_config_file(const char* filename, const options_description&,
                      bool allow_unregistered = false);

Tue, 04 Oct 2011 19:13:02 GMT

So what error msg do you get when you try the example?

Tue, 04 Oct 2011 19:14:44 GMT

Replying to Olaf van der Spek <olafvdspek@…>:

So what error msg do you get when you try the example?

../src/main.cpp:56: error: no matching function for call to ‘parse_config_file(const char [20], boost::program_options::options_description&)’

anonymous — Mon, 14 Nov 2011 14:26:47 GMT

Was that fixed or is there any workaround? Got same error with boost 1.47 and GCC 4.6.2.

anonymous — Fri, 23 Mar 2012 15:32:51 GMT

Replying to anonymous:

Was that fixed or is there any workaround? Got same error with boost 1.47 and GCC 4.6.2.

Write: parse_config_file<char>(......); and it works.

Sun, 12 Aug 2012 20:33:54 GMT

shouldn't this function be declared as

    template<class charT>
#if ! BOOST_WORKAROUND(__ICL, BOOST_TESTED_AT(700))
    BOOST_PROGRAM_OPTIONS_DECL
#endif
    basic_parsed_options<charT>
    parse_config_file(const charT* filename, const options_description&,
                      bool allow_unregistered = false);

and just ignore those people who tries to pass an int* or double* or whatever* to it?