Support complex macros. #1957

Job	Run time
msrv	4m 6s
minimal	14s
rustfmt-clippy	31s
check-cfg	24s
docs	22s
quickchecking	14s
test (ubuntu-latest, 9.0, 1, 0, 0, 0, 0)	1m 54s
test-book	10s
test (ubuntu-latest, 9.0, 1, 0, 0, 1, 0)	1m 56s
test-expectations (ubuntu-latest)	1m 22s
test (ubuntu-latest, 9.0, 1, 0, 1, 0, 0)	2m 28s
test-expectations (macos-latest)	4m 4s
test (ubuntu-latest, 9.0, 1, 0, 1, 1, 0)	2m 1s
test (ubuntu-latest, 9.0, 1, 1, 0, 0, 0)	2m 31s
test (ubuntu-latest, 9.0, 1, 1, 0, 1, 0)	2m 50s
test (ubuntu-latest, 9.0, 1, 1, 1, 0, 0)	2m 47s
test (ubuntu-latest, 9.0, 1, 1, 1, 1, 0)	2m 34s
test (ubuntu-latest, 16.0, 1, 0, 0, 0, 0)	2m 41s
test (ubuntu-latest, 16.0, 1, 0, 0, 1, 0)	2m 51s
test (ubuntu-latest, 16.0, 1, 0, 1, 0, 0)	2m 47s
test (ubuntu-latest, 16.0, 1, 0, 1, 1, 0)	2m 58s
test (ubuntu-latest, 16.0, 1, 1, 0, 0, 0)	3m 28s
test (ubuntu-latest, 16.0, 1, 1, 0, 1, 0)	3m 42s
test (ubuntu-latest, 16.0, 1, 1, 1, 0, 0)	3m 55s
test (ubuntu-latest, 16.0, 1, 1, 1, 1, 0)	3m 26s
test (ubuntu-latest, 16.0, 0, 0, 1)	1m 47s
test (macos-latest, 9.0, 0, 0, 0)	2m 33s
success	1s
	1h 0m 37s

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