Simplify ES.49 example

brett-m-rogers · brett-m-rogers · commit 28faeb24b4f8 · 2026-06-15T14:50:11.000+10:00
diff --git a/CppCoreGuidelines.md b/CppCoreGuidelines.md
@@ -12174,7 +12174,7 @@ The named casts are:
     class B { /* ... */ };
     class D { /* ... */ };
 
-    template<typename D> D* upcast(B* pb)
+    D* downcast(B* pb)
     {
         D* pd0 = pb;                        // error: no implicit conversion from B* to D*
         D* pd1 = (D*)pb;                    // legal, but what is done?

Original file line number	Diff line number	Diff line change
`@@ -12174,7 +12174,7 @@ The named casts are:`
`12174`	`12174`	`class B { /* ... */ };`
`12175`	`12175`	`class D { /* ... */ };`
`12176`	`12176`
`12177`		`- template<typename D> D* upcast(B* pb)`
	`12177`	`+ D* downcast(B* pb)`
`12178`	`12178`	`{`
`12179`	`12179`	`D* pd0 = pb; // error: no implicit conversion from B* to D*`
`12180`	`12180`	`D* pd1 = (D*)pb; // legal, but what is done?`