From 5bfaa3a966f01301ca8e856963628c6fdf68cb7d Mon Sep 17 00:00:00 2001
From: Lioncash <mai.iam2048@gmail.com>
Date: Wed, 31 Jan 2024 12:37:41 -0500
Subject: [PATCH] NativeVertexFormat: Collapse std namespace and mark hash
 noexcept

We can just tag the std:: onto the end of the specialization to make it
less noisy.

Also mark it as noexcept, since hashes shouldn't throw exceptions.
---
 Source/Core/VideoCommon/NativeVertexFormat.h | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/Source/Core/VideoCommon/NativeVertexFormat.h b/Source/Core/VideoCommon/NativeVertexFormat.h
index 597f492e9e..0f6be25541 100644
--- a/Source/Core/VideoCommon/NativeVertexFormat.h
+++ b/Source/Core/VideoCommon/NativeVertexFormat.h
@@ -79,14 +79,12 @@ struct PortableVertexDeclaration
 static_assert(std::is_trivially_copyable_v<PortableVertexDeclaration>,
               "Make sure we can memset-initialize");
 
-namespace std
-{
 template <>
-struct hash<PortableVertexDeclaration>
+struct std::hash<PortableVertexDeclaration>
 {
   // Implementation from Wikipedia.
   template <typename T>
-  u32 Fletcher32(const T& data) const
+  static u32 Fletcher32(const T& data)
   {
     static_assert(sizeof(T) % sizeof(u16) == 0);
 
@@ -114,9 +112,11 @@ struct hash<PortableVertexDeclaration>
     sum2 = (sum2 & 0xffff) + (sum2 >> 16);
     return (sum2 << 16 | sum1);
   }
-  size_t operator()(const PortableVertexDeclaration& decl) const { return Fletcher32(decl); }
+  size_t operator()(const PortableVertexDeclaration& decl) const noexcept
+  {
+    return Fletcher32(decl);
+  }
 };
-}  // namespace std
 
 // The implementation of this class is specific for GL/DX, so NativeVertexFormat.cpp
 // is in the respective backend, not here in VideoCommon.