Guidelines for macros

[mattBrzezinski]

I'm currently working with AWSCore.jl and came across macro usage being over the line limit. I wasn't able to find a guideline for it here, so I figured I'd open it up to discussion.

Examples:

@delay_retry if e isa AWSException &&
    (http_status(e.cause) == TOO_MANY_REQUESTS || ecode(e) in throttling_error_codes)
end

@retry if e isa AWSException && (
    header(e.cause, "crc32body") == "x-amz-crc32" ||
    ecode(e) in ("BadDigest", "RequestTimeout", "RequestTimeoutException")
)
end

@retry if :message in fieldnames(typeof(e)) && occursin("Signature expired", e.message) end

[oxinabox]

related
I have seen @omus prefernetially use

(@foo a b c)

over

@foo(a, b, c)

which i think has some advantages when the body of macro becomes more complex