Def ListM.head?

Modification history

2023-08-09 01:11
Mathlib/Data/ListM/Basic.lean
chore: bump Std (adapt to migration of ListM) (#6413) …
Deleted ListM.head?View on Github →
2023-04-21 04:11
Mathlib/Data/ListM/Basic.lean
feat: make `ListM` safe (#3559) …
Added ListM.head?View on Github →