From 0a1b578fcd85796a705db2d39612562bd83c9852 Mon Sep 17 00:00:00 2001
From: q66 <daniel@octaforge.org>
Date: Wed, 6 Jul 2016 19:10:17 +0200
Subject: [PATCH] ignore some template specializations for systems with no big
 char builtins

---
 ostd/functional.hh  | 2 ++
 ostd/type_traits.hh | 2 ++
 ostd/types.hh       | 1 +
 3 files changed, 5 insertions(+)

diff --git a/ostd/functional.hh b/ostd/functional.hh
index 0914e1f..3940fb0 100644
--- a/ostd/functional.hh
+++ b/ostd/functional.hh
@@ -240,8 +240,10 @@ OSTD_HASH_BASIC(ushort)
 OSTD_HASH_BASIC(uint)
 OSTD_HASH_BASIC(ulong)
 
+#ifndef OSTD_TYPES_CHAR_16_32_NO_BUILTINS
 OSTD_HASH_BASIC(Char16)
 OSTD_HASH_BASIC(Char32)
+#endif
 OSTD_HASH_BASIC(Wchar)
 
 #undef OSTD_HASH_BASIC
diff --git a/ostd/type_traits.hh b/ostd/type_traits.hh
index 467fa8c..909e9db 100644
--- a/ostd/type_traits.hh
+++ b/ostd/type_traits.hh
@@ -101,8 +101,10 @@ namespace detail {
     template<> constexpr bool IsIntegralBase<llong > = true;
     template<> constexpr bool IsIntegralBase<ullong> = true;
 
+#ifndef OSTD_TYPES_CHAR_16_32_NO_BUILTINS
     template<> constexpr bool IsIntegralBase<Char16> = true;
     template<> constexpr bool IsIntegralBase<Char32> = true;
+#endif
     template<> constexpr bool IsIntegralBase<Wchar > = true;
 }
 
diff --git a/ostd/types.hh b/ostd/types.hh
index 7c197f2..dde0c7d 100644
--- a/ostd/types.hh
+++ b/ostd/types.hh
@@ -37,6 +37,7 @@ using Wchar = wchar_t;
 #if defined(_MSC_VER) && (_MSC_VER < 1900)
 using Char16 = uint16_t;
 using Char32 = uint32_t;
+#define OSTD_TYPES_CHAR_16_32_NO_BUILTINS 1
 #else
 using Char16 = char16_t;
 using Char32 = char32_t;