[英]How to pass special characters as string argument using structopt?
I have a command line to search a word inside a file.我有一个命令行来搜索文件中的单词。 I'm using StructOpt to get the word that the user wants to search.我正在使用 StructOpt 来获取用户想要搜索的单词。
#[derive(Debug, StructOpt)]
pub struct Command {
pub word_to_search: Option<String>,
}
The problem comes when you write something like command -a
.当您编写诸如command -a
之类的内容时,问题就来了。 I know that the library is trying to do something with -a
and there is no -a
in the struct
, so I tried: command "-a"
but it displays:我知道该库正在尝试使用-a
做某事并且struct
中没有-a
,所以我尝试了: command "-a"
但它显示:
error: Found argument '-a' which wasn't expected, or isn't valid in this context
Is there a way to pass special characters like -a
and retrieve the information ( -a
) using StructOpt?有没有办法传递特殊字符,如-a
并使用 StructOpt 检索信息( -a
)?
You don't need to change anything, you only have to call the command using command -- -a
.您无需更改任何内容,只需使用command -- -a
调用命令。 The double dash is used to indicate that it's the end of options and in this case the rest is the word that the user is looking for.双破折号用于表示选项结束,在这种情况下,rest 是用户正在寻找的词。
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