有些人可以告诉我为什么这段代码没有编译。我正在尝试使用ppx_deriving库打印抽象语法树。
type prog = command list
[@@deriving show]
and command =
| Incv | Decv
| Incp | Decp
| Input | Output
| Loop of command list
[@@deriving show]
let _ = Format.printf "%s" (show_prog ([Incv, Incv]))
hello:brainfuckinter mukeshtiwari$ ocamlbuild -package ppx_deriving.std ast.byte
+ /Users/mukeshtiwari/.opam/4.02.1/bin/ocamlc.opt -c -I /Users/mukeshtiwari/.opam/4.02.1/lib/ppx_deriving -o ast.cmo ast.ml
File "ast.ml", line 10, characters 28-37:
Error: Unbound value show_prog
Command exited with code 2.
Compilation unsuccessful after building 2 targets (1 cached) in 00:00:00.
hello:brainfuckinter mukeshtiwari$ ocaml
OCaml version 4.02.1
答案 0 :(得分:5)
添加-use-ocamlfind
作为ocamlbuild的第一个参数。它应该解决这个问题。
([Incv, Incv]
中也有拼写错误,,
应为;
。