Is "comptime" necessary here?

[split temple]

In the zig documentation found I this example.

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

test "optional type" {
    // Declare an optional and coerce from null:
    var foo: ?i32 = null;

    // Coerce from child type of an optional
    foo = 1234;

    // Use compile-time reflection to access the child type of the optional:
    try comptime expect(@typeInfo(@TypeOf(foo)).Optional.child == i32);
}

What's the significance of comptime here? The test ran successfully, even when I removed the comptime keyword here.

[slate bear]

I don't think there's any real significance semantically

all it really does is make it so that the expect(...) call is evaluated at compile time

meaning that the code is essentially equivalent to {}

and if it were changed to != i32

it would be essentially equivalent to if (true) return error.TestUnexpectedResult;

without the comptime, it's just equivalent to try expect(true);

[split temple]

@slate bear Thanks for pointing out to change the condition to != i32. I can see the two error messages are slightly different.