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std: introduce meta.traits.is{Integral,Float}

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This commit is contained in:
LemonBoy 2020-12-09 20:42:08 +01:00
parent 23c1b7faee
commit ef7db9717e
1 changed files with 32 additions and 0 deletions
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32
lib/std/meta/trait.zig
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@ -312,6 +312,38 @@ test "std.meta.trait.isNumber" {
testing.expect(!isNumber(NotANumber));
}
pub fn isIntegral(comptime T: type) bool {
return switch (@typeInfo(T)) {
.Int, .ComptimeInt => true,
else => false,
};
}
test "isIntegral" {
testing.expect(isIntegral(u32));
testing.expect(!isIntegral(f32));
testing.expect(isIntegral(@TypeOf(102)));
testing.expect(!isIntegral(@TypeOf(102.123)));
testing.expect(!isIntegral(*u8));
testing.expect(!isIntegral([]u8));
}
pub fn isFloat(comptime T: type) bool {
return switch (@typeInfo(T)) {
.Float, .ComptimeFloat => true,
else => false,
};
}
test "isFloat" {
testing.expect(!isFloat(u32));
testing.expect(isFloat(f32));
testing.expect(!isFloat(@TypeOf(102)));
testing.expect(isFloat(@TypeOf(102.123)));
testing.expect(!isFloat(*f64));
testing.expect(!isFloat([]f32));
}
pub fn isConstPtr(comptime T: type) bool {
if (!comptime is(.Pointer)(T)) return false;
return @typeInfo(T).Pointer.is_const;