From 52d4375b10d920a59f1309c272a2e525feb1c25d Mon Sep 17 00:00:00 2001
From: Roland Reichwein <mail@reichwein.it>
Date: Sat, 1 Jan 2022 20:25:34 +0100
Subject: Separated out headers files; optimizations; type traits; better
 naming

---
 include/unicode/type_traits.h | 77 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 include/unicode/type_traits.h

(limited to 'include/unicode/type_traits.h')

diff --git a/include/unicode/type_traits.h b/include/unicode/type_traits.h
new file mode 100644
index 0000000..3ee1d82
--- /dev/null
+++ b/include/unicode/type_traits.h
@@ -0,0 +1,77 @@
+#pragma once
+
+#include "utf.h"
+
+#include <string>
+#include <type_traits>
+
+namespace unicode {
+
+ using namespace detail;
+
+ // helper traits
+ 
+ template<typename T>
+ struct is_encoding
+ {
+  static const bool value{std::is_empty_v<T>};
+ };
+ 
+ template<typename T>
+ inline constexpr bool is_encoding_v {is_encoding<T>::value};
+
+ template<typename T>
+ struct is_container
+ {
+  static const bool value{!std::is_empty_v<T>};
+ };
+ 
+ template<typename T>
+ inline constexpr bool is_container_v {is_container<T>::value};
+
+ template<typename T>
+ struct is_char
+ {
+  static const bool value{std::is_trivial_v<T> && std::is_scalar_v<T> && !std::is_empty_v<T>};
+ };
+ 
+ template<typename T>
+ inline constexpr bool is_char_v {is_char<T>::value};
+
+ template<typename T>
+ struct is_utf_encoding
+ {
+  static const bool value{std::is_same_v<T, UTF<utf_iterator<typename T::value_type>, utf_back_insert_iterator<typename T::value_type>>>};
+ };
+
+ template<typename T>
+ inline constexpr bool is_utf_encoding_v {is_utf_encoding<T>::value};
+
+ template<typename T>
+ struct is_utf_8
+ {
+  static const bool value{std::is_trivial_v<T> && sizeof(T) == 1};
+ };
+ 
+ template<typename T>
+ inline constexpr bool is_utf_8_v {is_utf_8<T>::value};
+
+ template<typename T>
+ struct is_utf_16
+ {
+  static const bool value{std::is_trivial_v<T> && sizeof(T) == 2};
+ };
+ 
+ template<typename T>
+ inline constexpr bool is_utf_16_v {is_utf_16<T>::value};
+
+ template<typename T>
+ struct is_utf_32
+ {
+  static const bool value{std::is_trivial_v<T> && sizeof(T) == 4};
+ };
+ 
+ template<typename T>
+ inline constexpr bool is_utf_32_v {is_utf_32<T>::value};
+
+} // namespace unicode
-- 
cgit v1.2.3