3.9 Suppressing End of Line Markers
3.9 Suppressing End of Line Markers
End of line markers can be suppressed by the @  sequence. A
single occurrence of a @  sequence serves to suppress only the
Tutorial
end of line marker following it and must appear 
exactly
  before
the end of line marker to be suppressed. No trailing spaces, @!
Developer
comments, or any other characters are permitted between a @ 
sequence and the end of line that it is supposed to suppress. The
Reference
@  sequence is useful for constructing long output lines without
them having to appear in the input. It can also be used in the
1 Introduction
same way as the @+ was used in the previous section to assist
2 Interface
in exposing the structure of output text without affecting the
3 Scanner
output text itself. Finally, it is invaluable for suppressing the
4 Parser
EOL after the opening macro text @{ construct. For example:
5 Analyser
6 Tangle
@$@@{@ 
7 Weave
I am the walrus!@}
8 Shell
is equivalent to
9 Commands
10 Glossary
@$@@{I am the walrus!@}
11 References
The comment construct (@!) can also be used to suppress end
SEARCH
of lines. However, the @  construct should be preferred for this
purpose as it makes explicit the programmer s intent to suppress
the end of line.
Webmaster
    
Copyright   Ross N. Williams 1992,1999. All rights
reserved.
http://www.ross.net/funnelweb/reference/scanner_eol_supp.html [3/3/2000 10:47:42 PM]





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