Re: [Regex]: Warnings for unicode regex includes

Hi,

by adding another template specialization for unsigned int in 
perl_matcher.hpp I got rid of the third warning. What would be the best 
way to feed this change into boost?

Thanks and regards,

Roland

Roland Bock wrote:
> Hi,
> 
> when compiling the following code
> 
> <snip>
> #include <boost/regex.hpp>
> #include <boost/regex/icu.hpp>
> 
> int main()
> {
>    return 0;
> }
> </snip>
> 
> with g++ -Wall -Wextra, a bunch of warnings are produced, see below. The 
> first two seem trivial to solve, but I don't know about the third.
> 
> Is there a workaround to get rid of the warnings (other than to turn of 
> the -Wall and -Wextra) and/or should I file a bug report?
> 
> System information:
> Ubuntu 8.04, 64bit
> gcc 4.2.4
> boost 1.36
> 
> Regards,
> 
> Roland
> 
> PS: Here are the warnings I get:
> g++ -Wall -Wextra test.cpp -c -I ~/include/
> In file included from /home/rbock/include/boost/regex/icu.hpp:1015,
>                  from test.cpp:2:
> /home/rbock/include/boost/regex/v4/u32regex_token_iterator.hpp:286: 
> warning: unused parameter ‘submatch’
> /home/rbock/include/boost/regex/v4/u32regex_token_iterator.hpp:348: 
> warning: unused parameter ‘submatch’
> /home/rbock/include/boost/regex/v4/perl_matcher.hpp: In function ‘bool 
> boost::re_detail::can_start(charT, const unsigned char*, unsigned char) 
> [with charT = unsigned int]’:
> /home/rbock/include/boost/regex/v4/perl_matcher_common.hpp:787: 
> instantiated from ‘bool boost::re_detail::perl_matcher<BidiIterator, 
> Allocator, traits>::find_restart_any() [with BidiIterator = 
> boost::u16_to_u32_iterator<const UChar*, unsigned int>, Allocator = 
> std::allocator<boost::sub_match<boost::u16_to_u32_iterator<const UChar*, 
> unsigned int> > >, traits = boost::icu_regex_traits]’
> /home/rbock/include/boost/regex/v4/perl_matcher_common.hpp:245: 
> instantiated from ‘bool boost::re_detail::perl_matcher<BidiIterator, 
> Allocator, traits>::find_imp() [with BidiIterator = 
> boost::u16_to_u32_iterator<const UChar*, unsigned int>, Allocator = 
> std::allocator<boost::sub_match<boost::u16_to_u32_iterator<const UChar*, 
> unsigned int> > >, traits = boost::icu_regex_traits]’
> /home/rbock/include/boost/regex/v4/perl_matcher_common.hpp:229: 
> instantiated from ‘bool boost::re_detail::perl_matcher<BidiIterator, 
> Allocator, traits>::find() [with BidiIterator = 
> boost::u16_to_u32_iterator<const UChar*, unsigned int>, Allocator = 
> std::allocator<boost::sub_match<boost::u16_to_u32_iterator<const UChar*, 
> unsigned int> > >, traits = boost::icu_regex_traits]’
> /home/rbock/include/boost/regex/v4/regex_search.hpp:56:   instantiated 
> from ‘bool boost::regex_search(BidiIterator, BidiIterator, 
> boost::match_results<BidiIterator, Allocator>&, const 
> boost::basic_regex<charT, traits>&, 
> boost::regex_constants::match_flag_type, BidiIterator) [with 
> BidiIterator = boost::u16_to_u32_iterator<const UChar*, unsigned int>, 
> Allocator = 
> std::allocator<boost::sub_match<boost::u16_to_u32_iterator<const UChar*, 
> unsigned int> > >, charT = int, traits = boost::icu_regex_traits]’
> /home/rbock/include/boost/regex/v4/regex_iterator.hpp:75:   instantiated 
> from ‘bool boost::regex_iterator_implementation<BidirectionalIterator, 
> charT, traits>::next() [with BidirectionalIterator = 
> boost::u16_to_u32_iterator<const UChar*, unsigned int>, charT = int, 
> traits = boost::icu_regex_traits]’
> /home/rbock/include/boost/regex/v4/regex_iterator.hpp:142: instantiated 
> from ‘boost::regex_iterator<BidirectionalIterator, charT, traits>& 
> boost::regex_iterator<BidirectionalIterator, charT, 
> traits>::operator++() [with BidirectionalIterator = 
> boost::u16_to_u32_iterator<const UChar*, unsigned int>, charT = int, 
> traits = boost::icu_regex_traits]’
> /home/rbock/include/boost/regex/icu.hpp:847:   instantiated from 
> ‘OutputIterator boost::re_detail::do_regex_replace(OutputIterator, const 
> std::pair<I1, I1>&, const boost::u32regex&, const std::pair<I2, I2>&, 
> boost::regex_constants::match_flag_type) [with OutputIterator = 
> boost::utf16_output_iterator<boost::re_detail::unicode_string_out_iterator>, 
> I1 = boost::u16_to_u32_iterator<const UChar*, unsigned int>, I2 = 
> boost::u16_to_u32_iterator<const UChar*, unsigned int>]’
> /home/rbock/include/boost/regex/icu.hpp:1008:   instantiated from here
> /home/rbock/include/boost/regex/v4/perl_matcher.hpp:46: warning: 
> comparison of unsigned expression < 0 is always false
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