Meg's Code Collection

lib/zig/extras

1	const std = @import("std");
2	const string = []const u8;
3	const extras = @import("./lib.zig");
4
5	pub fn OneSmallerInt(comptime T: type) type {
6	const info = @typeInfo(T).int;
7	return @Int(info.signedness, info.bits - 1);
8	}
9
10	test {
11	try std.testing.expect(OneSmallerInt(u1) == u0);
12	}
13	test {
14	try std.testing.expect(OneSmallerInt(u2) == u1);
15	}
16	test {
17	try std.testing.expect(OneSmallerInt(u3) == u2);
18	}
19	test {
20	try std.testing.expect(OneSmallerInt(u4) == u3);
21	}
22	test {
23	try std.testing.expect(OneSmallerInt(u5) == u4);
24	}
25	test {
26	try std.testing.expect(OneSmallerInt(i1) == i0);
27	}
28	test {
29	try std.testing.expect(OneSmallerInt(i2) == i1);
30	}
31	test {
32	try std.testing.expect(OneSmallerInt(i3) == i2);
33	}
34	test {
35	try std.testing.expect(OneSmallerInt(i4) == i3);
36	}
37	test {
38	try std.testing.expect(OneSmallerInt(i5) == i4);
39	}