gcc: ptree_utils.hpp:76: warning: comparison is always false due to limited range of data type [-Wtype-limits]

[anonymous]

gcc version 4.7.2 (Built by MinGW-builds project) i686-w64-mingw32

yields

boost/property_tree/detail/ptree_utils.hpp: In instantiation of 'std::string boost::property_tree::detail::narrow(const Ch*) [with Ch = wchar_t; std::string = std::basic_string<char>]':
boost/property_tree/string_path.hpp:64:36:   required from here
boost/property_tree/detail/ptree_utils.hpp:76:13: warning: comparison is always false due to limited range of data type [-Wtype-limits]

76: if (*text < 0 || *text > (std::numeric_limits<char>::max)())

[kailoran@…]

C++11-only patch to fix the warning

[Gaurav Gupta <g.gupta@…>]

I also faced this warning, with some Arm compiler. I applied a temporary fix by adding #pragma Macros in the header file.

[Gaurav Gupta <g.gupta@…>]

I removed this warning as below:

#if defined(_MSC_VER) && (_MSC_VER >= 1020) # pragma once #else for GCC compiler, treat as 'system header' to avoid compiler warnings in boost code # pragma GCC system_header #endif