Re: [Boost-users] [!! SPAM] [wave] Trace output lines with single underscore

Subject: Re: [Boost-users] [!! SPAM] [wave] Trace output lines with single underscore
From: Hartmut Kaiser (hartmut.kaiser_at_[hidden])
Date: 2011-07-19 20:42:05

> Many of the rescanning lines in the Wave trace output for a macro I am
> tracing show either just a single underscore ( _ ), where the output is
> empty, or a number and and underscore ( 1_ ) where it is actually just the
> number which is being output. What is the reason for the underscore ?

IIRC, the _ is used as a (readable) representation for the (empty)
placeholder token, which disappears from the final output, but is helpful
for debugging purposes.

Regards Hartmut
---------------
http://boost-spirit.com