Example run error

[onenewcode]

Description

example/namedtracer/main.go

An error in the file regarding the usage of baggage

The following code in the example does not create a new object and returns an error.

fooKey     = attribute.Key("ex.com/foo")
m0, _ := baggage.NewMemberRaw(string(fooKey), "foo1")

Because when the validateKeyChar method in baggage checks for '/', it returns an error.

Because safeKeyCharset in baggage doesn't contain '/'。

Expected behavior

Example run

[pellared]

This is may be fixed by #5132

However, notice that W3C baggage propagator would not handle such keys.

[onenewcode]

This is may be fixed by #5132

However, notice that W3C baggage propagator would not handle such keys.

I see

[pellared]

What do you expect?

[onenewcode]

As a new user of the framework, I had little knowledge of the w3c specification. I just want the functionality shown by example to work. Just example/namedtracer/main. go show usage is not correct. That bothers me

[dmathieu]

With #5132 being merged, this issue appear to be solved.

package main

import (
	"fmt"
	"os"

	"go.opentelemetry.io/otel/attribute"
	"go.opentelemetry.io/otel/baggage"
)

func main() {
	fooKey := attribute.Key("ex.com/foo")
	m0, _ := baggage.NewMemberRaw(string(fooKey), "foo1")
	fmt.Fprintf(os.Stdout, "%#v", m0)
}

go run main.go
baggage.Member{key:"ex.com/foo", value:"foo1", properties:baggage.properties(nil), hasData:true}%