================
@@ -0,0 +1,49 @@
+// RUN: %check_clang_tidy -std=c++23 %s cppcoreguidelines-missing-std-forward
%t -- -- -fno-delayed-template-parsing
+
+// NOLINTBEGIN
+namespace std {
+
+template <typename T> struct remove_reference { using type = T; };
+template <typename T> struct remove_reference<T&> { using type = T; };
+template <typename T> struct remove_reference<T&&> { using type = T; };
+
+template <typename T> using remove_reference_t = typename
remove_reference<T>::type;
+
+template <typename T> constexpr T &&forward(remove_reference_t<T> &t) noexcept;
+template <typename T> constexpr T &&forward(remove_reference_t<T> &&t)
noexcept;
+template <typename T> constexpr remove_reference_t<T> &&move(T &&x);
+
+template <class T, class U>
+concept derived_from = __is_base_of(U, T);
----------------
vbvictor wrote:
Can we not use compiler build-ins,
We can just leave it to anything, no need for real behavoir
https://github.com/llvm/llvm-project/pull/182038
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