std::format() now supports formatting options for pointer types that were previously available only for integers. Pointers can use zero-padding ({:018}), uppercase hex output ({:P}), and the alternate form to omit the 0x prefix. Additionally, any pointer type can now be formatted, not just void*, const void*, and std::nullptr_t.

Formatting arbitrary pointer types previously required casting to uintptr_t or writing a custom formatter. Controlling the output format (padding, case, prefix) was not possible without similar workarounds. These options are now available directly, matching the existing integer formatting capabilities.

#include <format>
#include <print>

int main() {
    int x = 42;
    int* ptr = &x;

    std::println("Default:    {}", static_cast<void*>(ptr));
    std::println("Padded:     {:018}", static_cast<void*>(ptr));
    std::println("Uppercase:  {:P}", static_cast<void*>(ptr));
}