Support complex macros. #1754

Job	Run time
docs	35s
check-cfg	32s
msrv	16s
minimal	25s
quickchecking	33s
rustfmt-clippy	56s
test-book	8s
test (ubuntu-latest, 5.0, 1, 0, 0, 0, 0)	2m 31s
test-expectations (ubuntu-latest)	35s
test (ubuntu-latest, 5.0, 1, 0, 0, 1, 0)	2m 33s
test-expectations (macos-latest)	33s
test (ubuntu-latest, 5.0, 1, 0, 1, 0, 0)	2m 17s
test (ubuntu-latest, 5.0, 1, 0, 1, 1, 0)	2m 25s
test (ubuntu-latest, 5.0, 1, 1, 0, 0, 0)	2m 34s
test (ubuntu-latest, 5.0, 1, 1, 0, 1, 0)	2m 33s
test (ubuntu-latest, 5.0, 1, 1, 1, 0, 0)	2m 33s
test (ubuntu-latest, 5.0, 1, 1, 1, 1, 0)	2m 35s
test (ubuntu-latest, 9.0, 1, 0, 0, 0, 0)	2m 33s
test (ubuntu-latest, 9.0, 1, 0, 0, 1, 0)	2m 31s
test (ubuntu-latest, 9.0, 1, 0, 1, 0, 0)	2m 33s
test (ubuntu-latest, 9.0, 1, 0, 1, 1, 0)	2m 32s
test (ubuntu-latest, 9.0, 1, 1, 0, 0, 0)	2m 31s
test (ubuntu-latest, 9.0, 1, 1, 0, 1, 0)	2m 34s
test (ubuntu-latest, 9.0, 1, 1, 1, 0, 0)	2m 32s
test (ubuntu-latest, 9.0, 1, 1, 1, 1, 0)	2m 31s
test (ubuntu-latest, 9.0, 0, 0, 1)	1m 53s
test (macos-latest, 9.0, 0, 0, 0)	2m 33s
	49m 17s

Provide feedback