AK: Add ReadonlySpan<T> as an alias for Span<T const>

This is a little clearer than Span<T const> where it looks like it's
the T not the underlying array that's const.

2 files changed, 9 insertions, 2 deletions

diff --git a/AK/Forward.h b/AK/Forward.h
index e258449ffd..3f67a9fd8a 100644
--- a/AK/Forward.h
+++ b/AK/Forward.h
@@ -61,7 +61,10 @@ struct Array;
 template<typename Container, typename ValueType>
 class SimpleIterator;
 
-using ReadonlyBytes = Span<u8 const>;
+template<typename T>
+using ReadonlySpan = Span<T const>;
+
+using ReadonlyBytes = ReadonlySpan<u8>;
 using Bytes = Span<u8>;
 
 template<typename T, AK::MemoryOrder DefaultMemoryOrder>
diff --git a/AK/Span.h b/AK/Span.h
index 79798c1527..c4ffe3c9b5 100644
--- a/AK/Span.h
+++ b/AK/Span.h
@@ -271,7 +271,10 @@ struct Traits<Span<T>> : public GenericTraits<Span<T>> {
     constexpr static bool is_trivial() { return true; }
 };
 
-using ReadonlyBytes = Span<u8 const>;
+template<typename T>
+using ReadonlySpan = Span<T const>;
+
+using ReadonlyBytes = ReadonlySpan<u8>;
 using Bytes = Span<u8>;
 
 }
@@ -279,5 +282,6 @@ using Bytes = Span<u8>;
 #if USING_AK_GLOBALLY
 using AK::Bytes;
 using AK::ReadonlyBytes;
+using AK::ReadonlySpan;
 using AK::Span;
 #endif