id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
2986	Boost.Filesystem warnings when wchar_t is 16-bit are a problem when warnings are treated as errors	spencer@…	Beman Dawes	"When wchar_t is 16-bit, some code in Boost.Filesystem can trigger range comparison warnings:

src/libs/detail/utf8_codecvt_facet.cpp:245: warning: comparison is always true due to limited range of data type
src/libs/detail/utf8_codecvt_facet.cpp:248: warning: comparison is always true due to limited range of data type
src/libs/detail/utf8_codecvt_facet.cpp:251: warning: comparison is always true due to limited range of data type

There is a note near this code that says to ignore these warnings if wchar_t is UCS2 (16-bit), but if the compiler is treating (all) warnings as errors, this is difficult to do automatically.

Something along the lines of the attached patch should allow the code to work properly in both cases.  An alternative solution would be to completely remove the specialization if wchar_t is 16-bit (i.e. wrap the whole function in the #ifdef guards)."	Patches	closed	Boost 1.40.0	filesystem	Boost 1.38.0	Cosmetic	fixed	warnings wchar_t UCS2