Boost
C++ Libraries
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Coding Standards
This is an older version of Boost and was released in 2023. The current version is 1.89.0.
boost::xpressive::has_fold_case — Trait used to denote that a traits class has the fold_case member function.
// In header: <boost/xpressive/regex_traits.hpp> template<typename Traits> struct has_fold_case : public is_convertible< Traits::version_tag *, regex_traits_version_1_case_fold_tag * > { };