specfem::utilities::always_false

template<auto... T>
constexpr bool specfem::utilities::always_false = false

Always-false template variable helper for static assertions.

Used in if-constexpr branches and static_assert statements to generate compile-time errors only when a specific template instantiation occurs. This is more robust than using false directly, which could trigger warnings or be optimized incorrectly.

template<typename T>
void process() {
  if constexpr (std::is_same_v<T, int>) {
    // handle int
  } else {
    static_assert(always_false<T>, "Unsupported type");
  }
}

Template Parameters:

T – Template parameter pack (values are ignored)