Types 为什么ocaml推断bool类型?
我有以下定义: 键入'a tree=Leaf |节点'a*'树*'树 和功能 let rec is_bst't:'a tree:[>`Empty | `Failure | `Success of'a*'a]=与t匹配 |叶子->空的 |Nodex,l,r->match is_bst'l,is_bst'r with |“失败,——>”失败 |_uz,`Failure->`Failure |`Empty,`Empty->`Empty |`Successa,b,`Empty->如果bTypes 为什么ocaml推断bool类型?,types,ocaml,Types,Ocaml,我有以下定义: 键入'a tree=Leaf |节点'a*'树*'树 和功能 let rec is_bst't:'a tree:[>`Empty | `Failure | `Success of'a*'a]=与t匹配 |叶子->空的 |Nodex,l,r->match is_bst'l,is_bst'r with |“失败,——>”失败 |_uz,`Failure->`Failure |`Empty,`Empty->`Empty |`Successa,b,`Empty->如果b如果x如果b
所以c:bool=>Successc,d==bool*bool的成功。问题是b
# 4 < 7 < 9
_
;;
Error: This expression has type int but an expression was expected of type bool