Allow wrapper function generation for functional macros #1907

Job	Run time
minimal	9s
docs	24s
check-cfg	22s
msrv	3m 42s
quickchecking	15s
rustfmt-clippy	30s
test-book	12s
test (ubuntu-latest, 9.0, 1, 0, 0, 0, 0)	2m 14s
test-expectations (ubuntu-latest)	52s
test (ubuntu-latest, 9.0, 1, 0, 0, 1, 0)	1m 50s
test-expectations (macos-latest)	2m 34s
test (ubuntu-latest, 9.0, 1, 0, 1, 0, 0)	2m 25s
test (ubuntu-latest, 9.0, 1, 0, 1, 1, 0)	1m 59s
test (ubuntu-latest, 9.0, 1, 1, 0, 0, 0)	2m 39s
test (ubuntu-latest, 9.0, 1, 1, 0, 1, 0)	2m 32s
test (ubuntu-latest, 9.0, 1, 1, 1, 0, 0)	2m 24s
test (ubuntu-latest, 9.0, 1, 1, 1, 1, 0)	2m 13s
test (ubuntu-latest, 16.0, 1, 0, 0, 0, 0)	2m 59s
test (ubuntu-latest, 16.0, 1, 0, 0, 1, 0)	2m 40s
test (ubuntu-latest, 16.0, 1, 0, 1, 0, 0)	3m 5s
test (ubuntu-latest, 16.0, 1, 0, 1, 1, 0)	2m 49s
test (ubuntu-latest, 16.0, 1, 1, 0, 0, 0)	3m 16s
test (ubuntu-latest, 16.0, 1, 1, 0, 1, 0)	3m 0s
test (ubuntu-latest, 16.0, 1, 1, 1, 0, 0)	3m 37s
test (ubuntu-latest, 16.0, 1, 1, 1, 1, 0)	3m 8s
test (ubuntu-latest, 16.0, 0, 0, 1)	2m 6s
test (macos-latest, 9.0, 0, 0, 0)	2m 34s
success	1s
	56m 31s

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