func MatcherFromTagSet(t *event.TagSet) (Matcher, error) {
m := make(Matcher, len(*t))
i := 0
var verr error
t.ForEach(func(k, v string) {
match, err := regexp.Compile(v)
if err != nil {
verr = err
} else {
m[i] = MatchSet{
Key: k,
Value: match,
}
}
})
return m, verr
}
