This delimiter first pattern is used a lot in Ocaml code as well: Records: https://github.com/janestreet/base/blob/master/src/avltree.ml#L21 https://github.com

This delimiter first pattern is used a lot in Ocaml code as well: Records: https://github.com/janestreet/base/blob/master/src/avltree.ml#L21 https://github.com/janestreet/base/blob/master/src/avltree.m... If statements: https://github.com/janestreet/base/blob/master/src/string.ml#L84 https://github.com/janestreet/base/blob/master/src/string.ml... Lists: https://github.com/janestreet/base/blob/master/src/string.ml#L175 https://github.com/janestreet/base/blob/master/src/string.ml... Function calls: https://github.com/janestreet/base/blob/master/src/string.ml#L219 https://github.com/janestreet/base/blob/master/src/string.ml... Type definitions: https://github.com/janestreet/base/blob/master/src/array.ml#L61 https://github.com/janestreet/base/blob/master/src/array.ml#... It's not always used, shorter snippets tend to be all on one line.