Does Sublime Text 4 have support for highlighting C++20 code? I tried this small example and the highlighting breaks at struct b:
#include <type_traits>
#include <concepts>
struct a { int foo() { return 0; } };
template <typename T>
concept has_foo = requires(T) { { T{}.foo() } -> std::same_as<int>; };
template <typename T> requires has_foo<T>
struct b {};
int main() {
b<a> bb;
return 0;
}