Replace std::enable_if with requires

Introduce some concepts for enum and flags handling, goodbye and
thanks for all the fish std::enable_if.

1 files changed, 4 insertions, 4 deletions

diff --git a/src/utf8_iterator.hh b/src/utf8_iterator.hh
index 81302ef9..618a44a9 100644
--- a/src/utf8_iterator.hh
+++ b/src/utf8_iterator.hh
@@ -109,12 +109,12 @@ public:
     bool operator>= (const iterator& other) const noexcept { return m_it >= other.m_it; }
 
     template<typename T>
-    std::enable_if_t<std::is_same<T, BaseIt>::value or std::is_same<T, Sentinel>::value, bool>
-    operator==(const T& other) const noexcept { return m_it == other; }
+        requires std::is_same_v<T, BaseIt> or std::is_same_v<T, Sentinel>
+    bool operator==(const T& other) const noexcept { return m_it == other; }
 
     template<typename T>
-    std::enable_if_t<std::is_same<T, BaseIt>::value or std::is_same<T, Sentinel>::value, bool>
-    operator!=(const T& other) const noexcept { return m_it != other; }
+        requires std::is_same_v<T, BaseIt> or std::is_same_v<T, Sentinel>
+    bool operator!=(const T& other) const noexcept { return m_it != other; }
 
     bool operator< (const BaseIt& other) const noexcept { return m_it < other; }
     bool operator<= (const BaseIt& other) const noexcept { return m_it <= other; }