0.5.5 features (#1151)

0.5.5 Disallow multiple `_` in a row in digits, e.g. `1__000`. #1138. Fixed toposort example. Struct/union members now correctly rejects members without storage size #1147. `math::pow` will now correctly promote integer arguments. `math::pow` will now correctly promote integer arguments. Added `new_aligned` and `alloc_aligned` functions to prevent accidental under-alignment when allocating simd. Pointer difference would fail where alignment != size (structs etc) #1150. Add test that overalignment actually works for lists. Fixed array calculation for npot2 vectors. Use native aligned alloc on Windows and POSIX. Deprecates "offset". Simplification of the Allocator interface.

test/unit/stdlib/math/math.c3

@@ -144,4 +144,24 @@ fn void! test_trunc() @test
 	$assert @typeis(math::trunc(f), float);
 	double[<5>] vec = { -123.9, 123.9, 0.9, -0.9, 0 };
 	assert(math::trunc(vec) == double[<5>] { -123, 123, 0, 0, 0 });
+}
+
+fn void! test_round_decimals() @test
+{
+	double d = 0.532451241142;
+	float d_f = 0.532451241142;
+	assert(math::round_to_decimals(d, 2) == 0.53);
+	assert(math::round_to_decimals(d, 5) == 0.53245);
+
+	assert(math::round_to_decimals(d_f, 2) == 0.53f);
+	assert(math::round_to_decimals(d_f, 5) == 0.53245f);
+}
+
+fn void! test() @test
+{
+	double radians = math::deg_to_rad(45);
+	float radians_f = (float)math::deg_to_rad(45);
+
+	assert(math::round_to_decimals(radians, 3) == 0.785);
+	assert(math::round_to_decimals(radians_f, 3) == 0.785f);
 }