Support complex macros. #1755

Job	Run time
docs	38s
rustfmt-clippy	50s
check-cfg	37s
minimal	30s
msrv	12s
quickchecking	32s
test-book	18s
test (ubuntu-latest, 5.0, 1, 0, 0, 0, 0)	2m 45s
test-expectations (ubuntu-latest)	2m 13s
test (ubuntu-latest, 5.0, 1, 0, 0, 1, 0)	3m 5s
test-expectations (macos-latest)	3m 47s
test (ubuntu-latest, 5.0, 1, 0, 1, 0, 0)	2m 53s
test (ubuntu-latest, 5.0, 1, 0, 1, 1, 0)	2m 44s
test (ubuntu-latest, 5.0, 1, 1, 0, 0, 0)	4m 16s
test (ubuntu-latest, 5.0, 1, 1, 0, 1, 0)	4m 44s
test (ubuntu-latest, 5.0, 1, 1, 1, 0, 0)	4m 9s
test (ubuntu-latest, 5.0, 1, 1, 1, 1, 0)	3m 56s
test (ubuntu-latest, 9.0, 1, 0, 0, 0, 0)	3m 9s
test (ubuntu-latest, 9.0, 1, 0, 0, 1, 0)	3m 11s
test (ubuntu-latest, 9.0, 1, 0, 1, 0, 0)	3m 46s
test (ubuntu-latest, 9.0, 1, 0, 1, 1, 0)	3m 11s
test (ubuntu-latest, 9.0, 1, 1, 0, 0, 0)	4m 7s
test (ubuntu-latest, 9.0, 1, 1, 0, 1, 0)	4m 7s
test (ubuntu-latest, 9.0, 1, 1, 1, 0, 0)	4m 51s
test (ubuntu-latest, 9.0, 1, 1, 1, 1, 0)	4m 11s
test (ubuntu-latest, 9.0, 0, 0, 1)	1m 58s
test (macos-latest, 9.0, 0, 0, 0)	2m 43s
	1h 13m 23s

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