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auto merge of #8610 : kballard/rust/mod_floor, r=alexcrichton

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`mod_floor()` was incorrectly defined for uint types as `a / b` instead of `a % b`.
This commit is contained in:
bors
2013-08-21 09:31:43 -07:00
parent bf90634087 ac3bc9cfcc
commit e66478193b
1 changed files with 15 additions and 2 deletions
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src/libstd/num/uint_macros.rs
+15 -2
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@@ -238,9 +238,9 @@ fn div_floor(&self, other: &$T) -> $T { *self / *other }
/// Unsigned integer modulo operation. Returns the same result as `rem` (`%`).
#[inline]
fn mod_floor(&self, other: &$T) -> $T { *self / *other }
fn mod_floor(&self, other: &$T) -> $T { *self % *other }
/// Calculates `div_floor` and `modulo_floor` simultaneously
/// Calculates `div_floor` and `mod_floor` simultaneously
#[inline]
fn div_mod_floor(&self, other: &$T) -> ($T,$T) {
(*self / *other, *self % *other)
@@ -458,6 +458,19 @@ fn test_orderable() {
assert_eq!((3 as $T).clamp(&(2 as $T), &(4 as $T)), 3 as $T);
}
#[test]
fn test_div_mod_floor() {
assert_eq!((10 as $T).div_floor(&(3 as $T)), 3 as $T);
assert_eq!((10 as $T).mod_floor(&(3 as $T)), 1 as $T);
assert_eq!((10 as $T).div_mod_floor(&(3 as $T)), (3 as $T, 1 as $T));
assert_eq!((5 as $T).div_floor(&(5 as $T)), 1 as $T);
assert_eq!((5 as $T).mod_floor(&(5 as $T)), 0 as $T);
assert_eq!((5 as $T).div_mod_floor(&(5 as $T)), (1 as $T, 0 as $T));
assert_eq!((3 as $T).div_floor(&(7 as $T)), 0 as $T);
assert_eq!((3 as $T).mod_floor(&(7 as $T)), 3 as $T);
assert_eq!((3 as $T).div_mod_floor(&(7 as $T)), (0 as $T, 3 as $T));
}
#[test]
fn test_gcd() {
assert_eq!((10 as $T).gcd(&2), 2 as $T);