OCaml中的正则表达式 [英] Regular Expressions in OCaml

问题描述

我想在OCaml中使用 regexps ，看来Str模块提供了这些功能.

I want to use regexps in OCaml and it seems that Str module provides these functionalities.

所以我尝试了一个简单的程序:

So I tried with a simple program:

open Str
let regx = regexp "."

但是它给了我以下错误

文件"lol.ml"，第1行，字符0-1: 错误:链接lol.cmo时出错: 引用未定义的全局'Str'

File "lol.ml", line 1, characters 0-1: Error: Error while linking lol.cmo: Reference to undefined global `Str'

好像没有模块，但是如果我删除了open Str，它说regexp是一个未绑定的值.

As if module is not present but if I remove open Str it says that regexp is an unbound value.

我不知道这是什么问题，Str应该是标准模块(根据

I don't get what kind of issue it is, Str should be a standard module (according to http://caml.inria.fr/pub/docs/old-311/libref/Str.html) so I'm clueless.. the only think I thought is that signature (mli) is present but implementation (ml) is not.

我正在根据ocaml工具运行Objective Caml version 3.11.0.

有人可以帮我解决这个问题吗? 预先感谢

Can anyone help me figuring this out? Thanks in advance

推荐答案

来自手册:

使用str库的程序必须按以下方式链接:

Programs that use the str library must be linked as follows:

ocamlc other options str.cma other files
ocamlopt other options str.cmxa other files

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