modernize formatting by updating fmt and spdlog (#490)

MathewBensonCode · web-flow · commit 99fbb3c66a1f · 2026-01-18T23:36:44.000+09:00
- update fmt to version 11.2.0
- update spdlog to version v1.15.3
- This enables use of modern formatting facilities like custom
  formatting for types

Co-authored-by: Mathew Benson &lt;mathew@benson.co.ke&gt;
diff --git a/ZEngine/ZEngine/Windows/Inputs/KeyCode.h b/ZEngine/ZEngine/Windows/Inputs/KeyCode.h
@@ -1,6 +1,6 @@
 #pragma once
+#include <fmt/format.h>
 #include <cstdint>
-#include <iostream>
 
 namespace ZEngine::Windows::Inputs
 {
@@ -138,9 +138,8 @@ namespace ZEngine::Windows::Inputs
 
     } GlfwKey;
 
-    inline std::ostream& operator<<(std::ostream& stream, GlfwKeyCode f)
+    inline auto format_as(GlfwKey f)
     {
-        stream << static_cast<int32_t>(f);
-        return stream;
+        return fmt::underlying(f);
     }
 } // namespace ZEngine::Windows::Inputs
diff --git a/__externals/fmt b/__externals/fmt
@@ -1 +1 @@
-Subproject commit e41ac1f875b7a1c419beaf7ddf431a01fb530a92
+Subproject commit 40626af88bd7df9a5fb80be7b25ac85b122d6c21
diff --git a/__externals/spdlog b/__externals/spdlog
@@ -1 +1 @@
-Subproject commit 6491abb519a6a15792c1c6717270ce6c9ba4d72e
+Subproject commit 6fa36017cfd5731d617e1a934f0e5ea9c4445b13

Original file line number	Diff line number	Diff line change
`@@ -1,6 +1,6 @@`
`1`	`1`	`#pragma once`
	`2`	`+#include <fmt/format.h>`
`2`	`3`	`#include <cstdint>`
`3`		`-#include <iostream>`
`4`	`4`
`5`	`5`	`namespace ZEngine::Windows::Inputs`
`6`	`6`	`{`
`@@ -138,9 +138,8 @@ namespace ZEngine::Windows::Inputs`
`138`	`138`
`139`	`139`	`} GlfwKey;`
`140`	`140`
`141`		`- inline std::ostream& operator<<(std::ostream& stream, GlfwKeyCode f)`
	`141`	`+ inline auto format_as(GlfwKey f)`
`142`	`142`	`{`
`143`		`- stream << static_cast<int32_t>(f);`
`144`		`- return stream;`
	`143`	`+ return fmt::underlying(f);`
`145`	`144`	`}`
`146`	`145`	`} // namespace ZEngine::Windows::Inputs`