我是OCaml的新手,我试图尝试(:P)Facebook Reason语法。我无法找到一种方法来进行编译,因为如果找不到Core模块(已经安装了opam)。
我试图从Real World OCaml编译示例程序
open Core.Std;
let rec read_and_accumulate accum => {
let line = In_channel.input_line In_channel.stdin;
switch line {
| None => accum
| Some x => read_and_accumulate (accum +. Float.of_string x)
}
};
let () = printf "Total: %F\n" (read_and_accumulate 0.);
这是我用于编译的命令:rebuild accum.native
。
我在_tags
(来自https://janestreet.github.io/installation.html)
true: package(core,ppx_jane)
true: thread,debug
我的错误发生了变化,但我仍然不知道该怎么做:
File "_tags", line 1, characters 6-28:
Warning: tag "package" does not expect a parameter, but is used with parameter "core,ppx_jane"
File "_tags", line 1, characters 6-28:
Warning: the tag "package(core,ppx_jane)" is not used in any flag or dependency declaration, so it will have no effect; it may be a typo. Otherwise you can use `mark_tag_used` in your myocamlbuild.ml to disable this warning.
+ /Users/David/.opam/4.02.3/bin/ocamldep.opt -modules -pp refmt -impl accum2.re | tee accum2.re.depends accum2.ml.depends
accum2.re: Core Float In_channel
+ /Users/David/.opam/4.02.3/bin/ocamlc.opt -c -g -thread -pp '-g -thread' -pp refmt -o accum2.cmo -intf-suffix .rei -impl accum2.re
File "accum2.re", line 1, characters 5-13:
Error: Unbound module Core
Command exited with code 2.
Compilation unsuccessful after building 2 targets (0 cached) in 00:00:00.
使用Core with Reason需要做什么?
采用语法非常简单,我只阅读了几个小时,但是有关如何为非OCaml用户使用Reason的零文档。
答案 0 :(得分:3)
最近在Reason repo中出现了bug fix问题。基本上,由于rebuild
原来是reasonbuild
的包装,因此可以通过直接运行reasonbuild
来解决错误:
env OCAMLFIND_COMMANDS="ocamlc=$(which reopt)" reasonbuild -use-ocamlfind accum.native
事实上,reasonbuild -use-ocamlfind accum.native
也适用于此。
答案 1 :(得分:2)
基本上,https://janestreet.github.io/installation.html中指示的标记必须添加 plus ,还有三个用于此案例的标记和值:
-pp refmt
用于静态链接我假设-impl file.re
表示ReasonML预处理器accum.re
告诉要阅读的文件因此,如果文件名为ocamlfind ocamlc -g -thread -package ppx_jane -package core -pp refmt -linkpkg -o accum.native -impl accum.re
,则可以将其编译为本机二进制文件:
{{1}}
答案 2 :(得分:0)
我猜rebuild
是ocamlbuild的包装器。只需使用参数-use-ocamlfind
。