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Comment by rstarast | Hacker News Reader

Re 9, would it be possible to change the signature of expectEqual from

    pub fn expectEqual(expected: anytype, actual: @TypeOf(expected)) !void

    pub fn expectEqual(expected: @TypeOf(actual), actual: anytype) !void

What would the downsides be?

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No, it won't work. It'll say "actual" is undeclared.

https://github.com/ziglang/zig/issues/4437 is tracking the issue. I think std.testing is going to see some major changes, so it's possible this gets fixed. But going from the responses in that issue, I think that fix might be more of a side effect, since there doesn't seem to be too much sympathy for the issue as-is.

Why not place actual as the first argument and expected as the second? This matches the way I hand-write asserts like `assert(x == 5)`.

It isn't possible, compiler will complain about "actual" being an undeclared identifier. The function arguments are declared in order.

The compiler already allows using functions defined later in the same file. This is a solvable problem.

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