转到正则表达式以将标签与括号匹配

Question

I want to get the index of all tags inside brackets using regex package.

str := "[tag=blue]Hello [tag2=red,tag3=blue]Good"
rg := regexp.MustCompile(`(?:^|\W)\[([\w-]+)=([\w-]+)\]`)
rgi := fmtRegex.FindAllStringIndex(str, -1)
fmt.Println(rgi)
// Want index for:
// [tag=blue], [tag2=red,tag3=blue]

The regex needs to return indexes for [tag=blue], [tag2=red,tag3=blue]

but it only returns [tag=blue].

How do I fix this regex (?:^|\W)\[([\w-]+)=([\w-]+)\] so that I can also match the comman when there is more than one tags in the brackets

Answer 1

Seems like you want something like this,

(?<!\w)\[([\w-]+)=([\w-]+)(?:,[\w-]+=[\w-]+)*\]

DEMO

OR

\B\[([\w-]+)=([\w-]+)(?:,[\w-]+=[\w-]+)*\]

\B matches between two word characters or two non-word characters.

DEMO