https://jira.mongodb.org/browse/GODRIVER-3476

go.mod

module gist.github.com/AlekSi/c2f20c5f6dfa86115be5453b746f47a4

go 1.23

toolchain go1.23.5

require go.mongodb.org/mongo-driver/v2 v2.0.0

go.sum

github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
go.mongodb.org/mongo-driver/v2 v2.0.0 h1:Jfd7XpdZa9yk3eY774bO7SWVb30noLSirL9nKTpavhI=
go.mongodb.org/mongo-driver/v2 v2.0.0/go.mod h1:nSjmNq4JUstE8IRZKTktLgMHM4F1fccL6HGX1yh+8RA=

main.go

package main

import (
	"log"

	"go.mongodb.org/mongo-driver/v2/bson"
)

func main() {
	log.SetFlags(0)

	v := bson.D{
		{
			Key:   "string",
			Value: "\"",
		},
		{
			Key:   "regex",
			Value: bson.Regex{Pattern: "", Options: "\""},
		},
	}

	b, err := bson.MarshalExtJSON(v, true, true)
	if err != nil {
		log.Fatal(err)
	}
	log.Printf("Marshalled\n\n%#v\n\nas\n\n%s", v, b)
}