在GO中捕获重复组

Question

I'm trying to create a function that can parse strings which consist of an uppercase word followed by zero or more arguments which are encapsulated in double quotes.

For example, each of the following lines:

COPY "filename one" "filename two"
REMOVE "filename"
LIST "x" "y" "z"
DISCONNECT

The result should be a string (the command) followed by a string[] (the arguments inside the quotes). I created the following regular expression:

re1, _ := regexp.Compile(`([A-Z]+)(?: "([^"]+)")*`)
results := re1.FindAllStringSubmatch(input, -1)

However, no-matter what I try, only the last argument gets captured.

An example of my problem: https://play.golang.org/p/W1rE1X4SWf5

"arg1" is not captured in this example. What am I missing?

Answer 1

If your commands are well defined, e.i. command names are always upper-case and arguments are always after the command then a looser regex might just fit your use case:

re1, _ := regexp.Compile(`([A-Z]+)|(?: "([^"]+)")`)
results := re1.FindAllStringSubmatch(`COMMAND "arg1" "arg2" "arg3"`, -1)

fmt.Println("Command:", results[0][1])
for _, arg := range results[1:] {
    fmt.Println("Arg:", arg[2])
}

Playground