zig/test/cases/bitcast.zig

const assert = @import("std").debug.assert;

test "@bitCast i32 -> u32" {
    testBitCast_i32_u32();
    comptime testBitCast_i32_u32();
}

fn testBitCast_i32_u32() void {
    assert(conv(-1) == @maxValue(u32));
    assert(conv2(@maxValue(u32)) == -1);
}

fn conv(x: i32) u32 { return @bitCast(u32, x); }
fn conv2(x: u32) i32 { return @bitCast(i32, x); }