29
Numerics library
[numerics]
29.8
Generalized numeric operations
[numeric.ops]
29.8.13
Greatest common divisor
[numeric.ops.gcd]
template <class M, class N> constexpr common_type_t<M,N> gcd(M m, N n);
1
#
Requires:

m

and

n

shall be representable as a value of
common_type_t<M, N>
.
[
Note
:
These requirements ensure, for example, that
gcd(m,
m)
=

m

is representable as a value of type
M
.
—
end note
]
2
#
Remarks:
If either
M
or
N
is not an integer type, or if either is
cv
bool
, the program is illformed
.
3
#
Returns:
Zero when
m
and
n
are both zero
.
Otherwise, returns the greatest common divisor of

m

and

n

.
4
#
Throws:
Nothing
.