From dd685fb0bd6726038c863a69037cc30a7294ffcf Mon Sep 17 00:00:00 2001
From: Roland Reichwein <mail@reichwein.it>
Date: Mon, 15 Nov 2021 10:40:42 +0100
Subject: Build w/ C++20

---
 Makefile             |  4 ++--
 include/unicode.h    | 24 +++++++++++++-----------
 src/test-unicode.cpp |  6 +++---
 3 files changed, 18 insertions(+), 16 deletions(-)

diff --git a/Makefile b/Makefile
index 03bf1d1..f3f072f 100644
--- a/Makefile
+++ b/Makefile
@@ -14,8 +14,8 @@ CXX=clang++-11
 endif
 
 # boost is buggy for C++20: error: static_assert failed due to requirement 'detail::is_endian_reversible_inplace<char8_t>
-STANDARD=c++17
-#STANDARD=c++20
+#STANDARD=c++17
+STANDARD=c++20
 
 ifeq ($(CXXFLAGS),)
 CXXFLAGS=-O0 -g -D_DEBUG
diff --git a/include/unicode.h b/include/unicode.h
index 502ec16..33b3199 100644
--- a/include/unicode.h
+++ b/include/unicode.h
@@ -19,8 +19,10 @@
 #ifdef __cpp_char8_t
 // char8_t available
  typedef char8_t utf8_t;
+ typedef char    iso_t;
 #else
  typedef char utf8_t;
+ typedef char iso_t;
 #endif
 
 namespace unicode {
@@ -353,10 +355,10 @@ namespace unicode::detail {
  typedef std::unordered_map<char32_t, utf8_t> iso_map_type_reverse;
 
  // ISO-8859-1 is lower 8-bit of Unicode, so no exceptions necessary
- iso_map_type iso_8859_1_map;
+ static inline iso_map_type iso_8859_1_map;
 
  // ISO-8859-15 is lower 8-bit of Unicode, except for:
- iso_map_type iso_8859_15_map {
+ static inline iso_map_type iso_8859_15_map {
   { '\xA4', U'\u20AC' }, // €
   { '\xA6', U'\u0160' }, // Š
   { '\xA8', U'\u0161' }, // š
@@ -367,7 +369,7 @@ namespace unicode::detail {
   { '\xBE', U'\u0178' }, // Ÿ
  };
 
- iso_map_type_reverse reverse_iso_map(const iso_map_type& map) {
+ inline iso_map_type_reverse reverse_iso_map(const iso_map_type& map) {
   iso_map_type_reverse result;
   std::for_each(map.cbegin(), map.cend(),
                 [&](const iso_map_type::value_type& pair)
@@ -377,8 +379,8 @@ namespace unicode::detail {
   return result;
  }
 
- iso_map_type_reverse iso_8859_15_map_reverse { reverse_iso_map(iso_8859_15_map) };
- iso_map_type_reverse iso_8859_1_map_reverse { reverse_iso_map(iso_8859_1_map) };
+ static inline iso_map_type_reverse iso_8859_15_map_reverse { reverse_iso_map(iso_8859_15_map) };
+ static inline iso_map_type_reverse iso_8859_1_map_reverse { reverse_iso_map(iso_8859_1_map) };
 
 } // namespace unicode::detail
 
@@ -386,9 +388,9 @@ namespace unicode {
 
  using namespace detail;
 
- template<unicode::detail::iso_map_type& Map=iso_8859_1_map, typename Container=std::basic_string<utf8_t>>
+ template<unicode::detail::iso_map_type& Map=iso_8859_1_map, typename Container=std::basic_string<iso_t>>
  struct iso_iterator {
-  typedef utf8_t input_type;
+  typedef iso_t input_type;
   typedef char32_t value_type;
   typedef char32_t& reference;
   typedef char32_t* pointer;
@@ -414,7 +416,7 @@ namespace unicode {
   // return reference?
   value_type operator*()
   {
-   utf8_t value{*m_it};
+   input_type value{*m_it};
 
    if constexpr(std::addressof(Map) != std::addressof(iso_8859_1_map)) // mapping of 128 <= x <= 255 needed
    {
@@ -429,12 +431,12 @@ namespace unicode {
   iterator m_it;
  };
 
- template<unicode::detail::iso_map_type_reverse& Map=iso_8859_1_map_reverse, typename Container=std::basic_string<utf8_t>>
+ template<unicode::detail::iso_map_type_reverse& Map=iso_8859_1_map_reverse, typename Container=std::basic_string<iso_t>>
  struct iso_back_insert_iterator {
   typedef iso_back_insert_iterator& reference;
   typedef iso_back_insert_iterator* pointer;
   typedef size_t difference_type;
-  typedef utf8_t value_type;
+  typedef iso_t value_type;
   typedef std::output_iterator_tag iterator_category;
   typedef Container string_type;
   
@@ -486,7 +488,7 @@ namespace unicode {
  template<typename InputIt, typename OutputIt>
  struct ISO_8859
  {
-  typedef utf8_t value_type;
+  typedef iso_t value_type;
   typedef typename InputIt::string_type string_type;
 
   static InputIt begin(const typename InputIt::string_type& s)
diff --git a/src/test-unicode.cpp b/src/test-unicode.cpp
index 65ab5a2..9c68c59 100644
--- a/src/test-unicode.cpp
+++ b/src/test-unicode.cpp
@@ -37,7 +37,7 @@ std::vector<types_collection_type> success_sets {
 };
 
 // Error cases: throwing upon convert to all other types
-std::vector<std::basic_string<utf8_t>> failure_strings_char8_t {
+std::vector<std::basic_string<iso_t>> failure_strings_char8_t {
  // using u8"" here doesn't work on MSVC
  "\x80", // utf-8 continuation byte
  "\x81", // utf-8 continuation byte
@@ -364,7 +364,7 @@ BOOST_AUTO_TEST_CASE(convert)
  
  BOOST_CHECK_THROW(((void)std::string{unicode::convert<unicode::ISO_8859_15,unicode::ISO_8859_1>("\xa4")}), std::invalid_argument); // € not available in ISO-8859-1
  
- BOOST_CHECK((unicode::convert<unicode::UTF_8,unicode::UTF_16>("abc")) == std::u16string{u"abc"});
+ BOOST_CHECK((unicode::convert<unicode::UTF_8,unicode::UTF_16>(u8"abc")) == std::u16string{u"abc"});
  BOOST_CHECK((unicode::convert<unicode::UTF_32,unicode::UTF_16>(U"abc")) == std::u16string{u"abc"});
 
  BOOST_CHECK((unicode::convert<utf8_t,char16_t>("abc")) == std::u16string{u"abc"});
@@ -385,7 +385,7 @@ BOOST_AUTO_TEST_CASE(convert)
  BOOST_CHECK((unicode::convert<char, wchar_t>(u8"\u732b")) == std::wstring{L"\u732b"});
  BOOST_CHECK((unicode::convert<char, wchar_t>(u8"\U0001F63A")) == std::wstring{L"\U0001F63A"});
  BOOST_CHECK((unicode::convert<wchar_t, char32_t>(L"\U0001F63A")) == std::u32string{U"\U0001F63A"});
- BOOST_CHECK((unicode::convert<wchar_t, char>(L"\U0001F63A")) == std::string{u8"\U0001F63A"});
+ BOOST_CHECK((unicode::convert<wchar_t, utf8_t>(L"\U0001F63A")) == std::u8string{u8"\U0001F63A"});
  
  BOOST_CHECK((unicode::convert<std::string, std::wstring>(std::string{"äöü"})) == std::wstring{L"äöü"});
  
-- 
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