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Add comment how raw byte regexp matching works

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This commit is contained in:
Mattias Wadman 2021-10-17 14:48:50 +02:00
parent 7f36f703dd
commit 36fd74a181
1 changed files with 3 additions and 0 deletions
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3
pkg/interp/funcs.go
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@ -882,6 +882,9 @@ func (i *Interp) find(c interface{}, a []interface{}) gojq.Iter {
io.RuneReader
io.Seeker
}
// raw bytes regexp matching is a bit tricky, what we do is to read each byte as a codepoint (ByteRuneReader)
// and then we can use UTF-8 encoded codepoint to match a raw byte. So for example \u00ff (encoded as 0xc3 0xbf)
// will match the byte \0xff
if strings.Contains(flags, "b") {
// byte mode, read each byte as a rune
rr = ioextra.ByteRuneReader{RS: bb}