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Add is_even and is_odd to math module

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This commit is contained in:
Dmitry Atamanov
2023-07-19 11:16:40 +05:00
committed by Christoffer Lerno
parent 5aae9f3204
commit 49ea950f78
2 changed files with 63 additions and 0 deletions
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40
lib/std/math/math.c3
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@@ -845,6 +845,46 @@ macro int128 int128.sat_sub(int128 x, int128 y) => $$sat_sub(x, y);
macro int128 int128.sat_mul(int128 x, int128 y) => $$sat_mul(x, y);
macro int128 int128.sat_shl(int128 x, int128 y) => $$sat_shl(x, y);
/**
* @require values::@is_int(x) `The input must be an integer`
**/
macro bool is_odd(x) => (bool)(x & 1);
/**
* @require values::@is_int(x) `The input must be an integer`
**/
macro bool is_even(x) => !is_odd(x);
macro bool char.is_even(char x) => is_even(x);
macro bool char.is_odd(char x) => is_odd(x);
macro bool ichar.is_even(ichar x) => is_even(x);
macro bool ichar.is_odd(ichar x) => is_odd(x);
macro bool ushort.is_even(ushort x) => is_even(x);
macro bool ushort.is_odd(ushort x) => is_odd(x);
macro bool short.is_even(short x) => is_even(x);
macro bool short.is_odd(short x) => is_odd(x);
macro bool uint.is_even(uint x) => is_even(x);
macro bool uint.is_odd(uint x) => is_odd(x);
macro bool int.is_even(int x) => is_even(x);
macro bool int.is_odd(int x) => is_odd(x);
macro bool ulong.is_even(ulong x) => is_even(x);
macro bool ulong.is_odd(ulong x) => is_odd(x);
macro bool long.is_even(long x) => is_even(x);
macro bool long.is_odd(long x) => is_odd(x);
macro bool uint128.is_even(uint128 x) => is_even(x);
macro bool uint128.is_odd(uint128 x) => is_odd(x);
macro bool int128.is_even(int128 x) => is_even(x);
macro bool int128.is_odd(int128 x) => is_odd(x);
/**
* @checked x & 1
*/

23
test/unit/stdlib/math/math_is_even_odd.c3 Normal file
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@@ -0,0 +1,23 @@
module math_is_even_odd_tests;
import std::math;
import std::io;
macro test(start, ...)
{
$for (var $i = 0; $i < $vacount; $i++)
for ($vatype($i) i = ($vatype($i))start; i < 5; i+=2)
{
assert(math::is_even(i));
assert(i.is_even());
assert(!math::is_odd(i));
assert(!i.is_odd());
}
$endfor;
}
fn void! tests() @test
{
test(0, char, ushort, uint, ulong, uptr, usz, uint128);
test(-4, ichar, short, int, long, iptr, isz, int128);
}