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//#define XERR
#include "category.ih"
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0824r1.html:
// Two error_code instances compare equal if and only if they represent the
// same error enumerator in the same domain.
// Each "error domain" is represented in code by an object of type
// std::error_category.
// compare `condition' to an error condition constructed from the
// error condition constructed from the category matching the provided
// error code
//equiv
bool Category::equivalent(int ev, error_condition const &condition)
const noexcept
{
if (ev == 0) // no error? then
return condition.category() == *this and // categories must
not static_cast<bool>(condition); // be equal and
// condition must
// indicate no error
auto iter = s_map.find(as<CatErr>(ev)); // find ev's Cond
return iter == s_map.end()?
false // no such CatErr
: // or compare conditions
condition == make_error_condition(iter->second.cond);
}
//=
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