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Add a comment for the charclass limit.

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Signed-off-by: Cyril Tovena <cyril.tovena@gmail.com>
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Cyril Tovena 2021-10-05 13:52:12 +02:00
parent c751cfbfce
commit 453cc5de75
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1 changed files with 3 additions and 0 deletions
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3
pkg/labels/regexp.go
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@ -91,6 +91,9 @@ func findSetMatches(re *syntax.Regexp, base string) []string {
for i := 0; i < len(re.Rune); i = i + 2 { for i := 0; i < len(re.Rune); i = i + 2 {
totalSet += int(re.Rune[i+1] - re.Rune[i]) totalSet += int(re.Rune[i+1] - re.Rune[i])
} }
// limits the total characters that can be used to create matches.
// In some case like negation [^0-9] a lot of possibilities exists and that
// can create thousands of possible matches at which points we're better of using regexp.
if totalSet > 100 { if totalSet > 100 {
return nil return nil
} }