Adds a safe_int to an integral scalar, checking for overflow.
Declared in <mp-units/utility/safe_int.h>
template<typename U>
requires (detail::integral<U> && detail::same_sign_v<U, T>)
[[nodiscard]]
constexpr
safe_int</* implementation-defined */, ErrorPolicy>
operator+(
U lhs,
safe_int rhs);This function is a hidden friend of safe_int, declared only inside that class: it can be found only through argument-dependent lookup.
the sum, as a safe_int of the promoted result type; triggers ErrorPolicy::on_overflow on overflow
The return value should not be discarded.
| Name | Description |
|---|---|
| U | the integral scalar type |
| Name | Description |
|---|---|
| lhs | the integral scalar operand |
| rhs | the safe_int to add |