Subtracts an integral scalar from a safe_int, checking for overflow.

Synopsis

Declared in <mp‐units/utility/safe_int.h>

[[nodiscard]]
constexpr
safe_int</* implementation-defined */, ErrorPolicy>
operator‐(
    safe_int lhs,
    U rhs);

Return Value

the difference, as a safe_int of the promoted result type; triggers ErrorPolicy::on_overflow on overflow

Note

The return value should not be discarded.

Template Parameters

Name

Description

U

the integral scalar type

Parameters

Name

Description

lhs

the safe_int operand

rhs

the integral scalar to subtract

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