Function maxInt [src]

Returns the maximum value of integer type T.

Prototype

pub fn maxInt(comptime T: type) comptime_int

Parameters

T: type

Example

 test maxInt {
    try testing.expect(maxInt(u0) == 0);
    try testing.expect(maxInt(u1) == 1);
    try testing.expect(maxInt(u8) == 255);
    try testing.expect(maxInt(u16) == 65535);
    try testing.expect(maxInt(u32) == 4294967295);
    try testing.expect(maxInt(u64) == 18446744073709551615);
    try testing.expect(maxInt(u128) == 340282366920938463463374607431768211455);

    try testing.expect(maxInt(i0) == 0);
    try testing.expect(maxInt(i1) == 0);
    try testing.expect(maxInt(i8) == 127);
    try testing.expect(maxInt(i16) == 32767);
    try testing.expect(maxInt(i32) == 2147483647);
    try testing.expect(maxInt(i63) == 4611686018427387903);
    try testing.expect(maxInt(i64) == 9223372036854775807);
    try testing.expect(maxInt(i128) == 170141183460469231731687303715884105727);
}

Source

  pub fn maxInt(comptime T: type) comptime_int {
    const info = @typeInfo(T);
    const bit_count = info.int.bits;
    if (bit_count == 0) return 0;
    return (1 << (bit_count - @intFromBool(info.int.signedness == .signed))) - 1;
}  