针对特定后端的Boost.Locale测试

Question

有没有一种方法（最好在编译时或在配置时）检查Boost.Locale库是否在支持特定后端（即ICU）的情况下进行编译？

Answer 1

Boost.Locale provides this :

std::vector<std::string> boost::locale::localization_backend_manager::get_all_backends() const

This will list all the backends available. Eg,

localization_backend_manager lbm = localization_backend_manager::global();
auto s = lbm.get_all_backends();
for_each(s.begin(), s.end(), [](string& x){ cout << x << endl; });

will print

icu
winapi
std

If Boost.Locale wasn't built with ICU support, it will list only the two last lines.

You can use this in a configure script and compile a .cpp that accepts a backend as a parameter and checks whether it is supported.