More constexpr for find_meow, more constexpr tests

include/boost/static_string/detail/static_string.hpp

@@ -507,10 +507,10 @@ BOOST_STATIC_STRING_CPP14_CONSTEXPR
 inline
 ForwardIterator
 find_not_of(
-  ForwardIterator first, 
-  ForwardIterator last, 
-  const CharT* str, 
-  std::size_t n) noexcept
+    ForwardIterator first, 
+    ForwardIterator last, 
+    const CharT* str, 
+    std::size_t n) noexcept
 {
   for (; first != last; ++first)
     if (!Traits::find(str, n, *first))
@@ -518,6 +518,57 @@ find_not_of(
   return last;
 }
 
+// constexpr search for C++14
+template<
+    typename ForwardIt1, 
+    typename ForwardIt2, 
+    typename BinaryPredicate>
+BOOST_STATIC_STRING_CPP14_CONSTEXPR 
+inline
+ForwardIt1 
+search(
+    ForwardIt1 first,
+    ForwardIt1 last,
+    ForwardIt2 s_first,
+    ForwardIt2 s_last,
+    BinaryPredicate p)
+{
+  for (; ; ++first)
+  {
+    ForwardIt1 it = first;
+    for (ForwardIt2 s_it = s_first; ; ++it, ++s_it)
+    {
+      if (s_it == s_last)
+        return first;
+      if (it == last)
+        return last;
+      if (!p(*it, *s_it))
+        break;
+    }
+  }
+}
+
+template<
+    typename InputIt, 
+    typename ForwardIt, 
+    typename BinaryPredicate>
+BOOST_STATIC_STRING_CPP14_CONSTEXPR
+inline
+InputIt 
+find_first_of(
+    InputIt first,
+    InputIt last,
+    ForwardIt s_first,
+    ForwardIt s_last,
+    BinaryPredicate p)
+{
+  for (; first != last; ++first)
+    for (ForwardIt it = s_first; it != s_last; ++it)
+      if (p(*first, *it))
+        return first;
+  return last;
+}
+
 } // detail
 } // static_string
 } // boost

include/boost/static_string/impl/static_string.hpp

@@ -776,7 +776,7 @@ find(
     return npos;
   if (!n)
     return pos;
-  const auto res = std::search(&data()[pos], &data()[curr_size], s, &s[n], Traits::eq);
+  const auto res = detail::search(&data()[pos], &data()[curr_size], s, &s[n], Traits::eq);
   return res == end() ? npos : detail::distance(data(), res);
 }
 
@@ -817,7 +817,7 @@ find_first_of(
   const auto curr_data = data();
   if (pos >= size() || !n)
     return npos;
-  const auto res = std::find_first_of(&curr_data[pos], &curr_data[size()], s, &s[n], Traits::eq);
+  const auto res = detail::find_first_of(&curr_data[pos], &curr_data[size()], s, &s[n], Traits::eq);
   return res == end() ? npos : detail::distance(curr_data, res);
 }
 
@@ -838,7 +838,7 @@ find_last_of(
     pos = 0;
   else
     pos = curr_size - (pos + 1);
-  const auto res = std::find_first_of(rbegin() + pos, rend(), s, &s[n], Traits::eq);
+  const auto res = detail::find_first_of(rbegin() + pos, rend(), s, &s[n], Traits::eq);
   return res == rend() ? npos : curr_size - 1 - detail::distance(rbegin(), res);
 }
 

include/boost/static_string/static_string.hpp

@@ -1996,7 +1996,7 @@ public:
     template<std::size_t M>
     BOOST_STATIC_STRING_CPP14_CONSTEXPR
     size_type
-      find(
+    find(
         const basic_static_string<M, CharT, Traits>& str,
         size_type pos = 0) const noexcept
     {