package merlin-lib

Heuristic to find suitable environment to complete / type at given position. * 1. Try to find environment near given cursor. * 2. Check if there is an invalid construct between found env and cursor : * Case a. * > let x = valid_expr || * The env found is the right most env from valid_expr, it's a correct * answer. * Case b. * > let x = valid_expr * > let y = invalid_construction|| * In this case, the env found is the same as in case a, however it is * preferable to use env from enclosing module rather than an env from * inside x definition.