chore: Mark detail:forward_like as constexpr (#4147)

Skylion007 · web-flow · commit 81f35d29c621 · 2022-08-20T17:05:07.000-04:00
diff --git a/include/pybind11/stl.h b/include/pybind11/stl.h
@@ -45,7 +45,7 @@ using forwarded_type = conditional_t<std::is_lvalue_reference<T>::value,
 /// Forwards a value U as rvalue or lvalue according to whether T is rvalue or lvalue; typically
 /// used for forwarding a container's elements.
 template <typename T, typename U>
-forwarded_type<T, U> forward_like(U &&u) {
+constexpr forwarded_type<T, U> forward_like(U &&u) {
     return std::forward<detail::forwarded_type<T, U>>(std::forward<U>(u));
 }
 

Original file line number	Diff line number	Diff line change
`@@ -45,7 +45,7 @@ using forwarded_type = conditional_t<std::is_lvalue_reference<T>::value,`
`45`	`45`	`/// Forwards a value U as rvalue or lvalue according to whether T is rvalue or lvalue; typically`
`46`	`46`	`/// used for forwarding a container's elements.`
`47`	`47`	`template <typename T, typename U>`
`48`		`-forwarded_type<T, U> forward_like(U &&u) {`
	`48`	`+constexpr forwarded_type<T, U> forward_like(U &&u) {`
`49`	`49`	`return std::forward<detail::forwarded_type<T, U>>(std::forward<U>(u));`
`50`	`50`	`}`
`51`	`51`