Boost C++ Libraries: Ticket #2558: Unnecessary conversion warning in lexical_cast

status changed; resolution set

nasonov — Sat, 12 Sep 2009 22:33:07 GMT

status new → closed
resolution → worksforme

Not reproducible neither with gcc 3.4.6 nor 4.1.3 on NetBSD 5.99.17 (-current). Please submit a patch.

status, milestone changed; resolution deleted

anonymous — Mon, 21 Jan 2013 06:30:12 GMT

status closed → reopened
resolution worksforme
milestone Boost 1.38.0 → Boost 1.53.0

This above code is either broken again or still broken with g++ 4.7.

$ g++-fsf-4.7 -I/sw/include/ -Wconversion Foo.cpp
In file included from Foo.cpp:1:0:
/sw/include/boost/lexical_cast.hpp: In instantiation of 'CharT* boost::detail::lcast_put_unsigned(T, CharT*) [with Traits = std::char_traits<char>; T = unsigned int; CharT = char]':
/sw/include/boost/lexical_cast.hpp:860:13:   required from 'bool boost::detail::lexical_stream_limited_src<CharT, Base, Traits>::operator<<(int) [with CharT = char; Base = boost::detail::lexical_streambuf_fake; Traits = std::char_traits<char>]'
/sw/include/boost/lexical_cast.hpp:1151:13:   required from 'Target boost::detail::lexical_cast(typename boost::call_traits<Source>::param_type, CharT*, std::size_t) [with Target = std::basic_string<char>; Source = int; bool Unlimited = false; CharT = char; typename boost::call_traits<Source>::param_type = const int; std::size_t = long unsigned int]'
/sw/include/boost/lexical_cast.hpp:1174:77:   required from 'Target boost::lexical_cast(const Source&) [with Target = std::basic_string<char>; Source = int]'
Foo.cpp:6:25:   required from here
/sw/include/boost/lexical_cast.hpp:522:72: warning: conversion to 'char' from 'int' may alter its value [-Wconversion]
/sw/include/boost/lexical_cast.hpp:524:74: warning: conversion to 'char' from 'int' may alter its value [-Wconversion]
/sw/include/boost/lexical_cast.hpp:548:25: warning: conversion to 'char' from 'int' may alter its value [-Wconversion]

anonymous — Mon, 21 Jan 2013 06:33:13 GMT

That was 1.46.1 by the way.

owner, status changed

Antony Polukhin — Sun, 03 Feb 2013 07:42:01 GMT

owner changed from nasonov to Antony Polukhin
status reopened → new

Antony Polukhin — Sun, 03 Feb 2013 09:20:34 GMT

(In [82695]) Fixed as many -Wconversion warnings in lexical cast and tests as possible (refs #2558)

status changed; resolution set

Antony Polukhin — Sun, 24 Feb 2013 08:31:19 GMT

status new → closed
resolution → fixed

(In [83114]) Merge from trunk:

Silence some buggy VS warnings (fixes #7949)
Fix -Wconversion warnings (fixes #2558)
Added support for int128 conversions (fixes #7909)

milestone changed

Antony Polukhin — Sun, 24 Feb 2013 08:32:50 GMT

milestone Boost 1.53.0 → Boost 1.54.0