343 - Did you know that C++26 std.format added formatting pointers ab…

…ility?

README.md

@@ -12,6 +12,7 @@
 
 ### Tips
 
+* [[343]](https://github.com/QuantlabFinancial/cpp_tip_of_the_week/blob/master/tips/343.md) - Did you know that C++26 std.format added formatting pointers ability?
 * [[342]](https://github.com/QuantlabFinancial/cpp_tip_of_the_week/blob/master/tips/342.md) - Did you know that C++26 added 'A nice placeholder with no name'?
 * [[341]](https://github.com/QuantlabFinancial/cpp_tip_of_the_week/blob/master/tips/341.md) - Did you know that C++26 added user-generated static_assert messages?
 * [[340]](https://github.com/QuantlabFinancial/cpp_tip_of_the_week/blob/master/tips/340.md) - Did you know that C++26 added bind front and back to NTTP callables?

tips/342.md

@@ -39,4 +39,27 @@ int main() {
 
 </p></details><details><summary>Solutions</summary><p>
 
+```cpp
+auto guard() {
+    std::mutex m;
+    std::lock_guard _{m};
+    // ...
+}
+
+auto structure_bindigns() {
+    auto [a, _, c] = std::tuple{1, 2, 3};
+    (void)a;
+    (void)c;
+}
+
+auto assert_() {
+    auto _ = 42;
+    assert(_ == 42);
+}
+
+template<auto _> auto nttp() {}
+```
+
+> https://godbolt.org/z/dx9691YKn
+
 </p></details>

tips/343.md

@@ -0,0 +1,43 @@
+<details open><summary>Info</summary><p>
+
+* **Did you know that C++26 std.format added formatting pointers ability?
+
+  * https://wg21.link/P2510
+
+</p></details><details open><summary>Example</summary><p>
+
+```cpp
+int main() {
+    auto i = 42;
+    std::cout << std::format("{:#018X}", reinterpret_cast<uintptr_t>(&i)); // prints 0X00007FFD9D71776C
+}
+```
+
+> https://godbolt.org/z/18rhfdT8x
+
+</p></details><details open><summary>Puzzle</summary><p>
+
+* **Can you fill format strings to properly format given pointers?**
+
+```cpp
+int main() {
+    using namespace boost::ut;
+    using std::literals::operator""sv;
+
+    "std.format ptr"_test = [] {
+        auto ptr = reinterpret_cast<std::uintptr_t>(nullptr);
+
+        expect("0"sv == std::format("TODO", ptr));
+        expect("000000000000000000"sv == std::format("TODO", ptr));
+        expect("0x0000000000000000"sv == std::format("TODO", ptr));
+        expect("0X0000000000000000"sv == std::format("TODO", ptr));
+    };
+}
+```
+
+> https://godbolt.org/z/4eqznEh4q
+
+</p></details>
+
+</p></details><details><summary>Solutions</summary><p>
+</p></details>