how to custom filter in configure file for boost log?

Question

I had customized one sink with configure file, but the customized filter can't compile success with error:

unexpected character in the end of line.

it is caused by "" in ini. so how to solve it?

if I remove the last line ,it is ok.

configure file content sample.

Destination = "TextFile"
FileName = "ModuleOne_%3N.log"
AutoFlush = true
Filter=expr::attr<string>("Channel") == "module one"

Answer 1

Filter="%Channel% contains \\"MySink1\\" and %Severity% > info " is ok. and make sure before read configure:

register all the needed attribute ,what's more some types logger had register channel.