bug: ogenregex can't handle \p used ECMA-262 regexp pattern #1466
Description
Thanks for great project. ogen helps our company products :)
What version of ogen are you using?
$ go list -m github.com/ogen-go/ogen
github.com/ogen-go/ogen v1.13.1-0.20250526152536-f794c2de6f94Can this issue be reproduced with the latest version?
Yes
What did you do?
I have OpenAPI schema which uses following regex pattern:
"Name": {
"type": "string",
"description": "Allow Unicode char, Number, -, _ and .",
"minLength": 1,
"maxLength": 255,
"example": "name",
"pattern": "^[\\p{L}\\p{N}._\\-]+$"
},I created client library with ogen and I got validation error like below:
validate: invalid: name (string: no regex match: ^[\p{L}\p{N}._\-]+$)
Here is the test code based on ogenregex.
converted, ok := ogenregex.Convert("^[\\p{L}\\p{N}._\\-]+$")
if !ok {
fmt.Println("Can't converting pattern")
return
}
fmt.Printf("Converted regex: %v\n", converted) // I think converted pattern is wrong
re := ogenregex.MustCompile("^[\\p{L}\\p{N}._\\-]+$")
fmt.Printf("Regex type: %v\n", reflect.TypeOf(re))
val, _ := re.MatchString("test-service")
fmt.Printf("Regex match: %v\n", val)
re2, _ := regexp2.Compile("^[\\p{L}\\p{N}._\\-]+$", regexp2.ECMAScript|regexp2.Unicode)
val2, _ := re2.MatchString("test-service")
fmt.Printf("Regex2 match: %v\n", val2) // regexp2 works well
Test result:
Converted regex: ^[p{L}p{N}._\-]+$
Regex type: ogenregex.goRegexp
Regex match: false
Regex2 match: true
What did you expect to see?
ogenregex.MustCompile handles \p \ \P, Unicode character class escape, used ECMA-262 regexp pattern properly.
Use regexp2 for this case or ogenregex.Convert supports Unicode character class escape