const expect = @import("std").testing.expect;

// Zig's switch works as both a statement and an expression.
// The types of all branches must coerce to the type which is being switched upon.
// All possible values must have an associated branch - values cannot be left out.
// Cases cannot fall through to other branches.

// An example of a switch statement. The else is required to satisfy the exhaustiveness of this switch.
test "switch statement" {
    var x: i8 = 10;
    switch (x) {
        -1...1 => {
            x = -x;
        },
        10, 100 => {
            //special considerations must be made
            //when dividing signed integers
            x = @divExact(x, 10);
        },
        else => {},
    }
    try expect(x == 1);
}

// Here is the former, but as a switch expression.
test "switch expression" {
    var x: i8 = 10;
    x = switch (x) {
        -1...1 => -x,
        10, 100 => @divExact(x, 10),
        else => x,
    };
    try expect(x == 1);
}

// Now is the perfect time to use what you've learned and solve a problem together.