4.10 Formal Parameter Lists
4.10 Formal Parameter Lists
FunnelWeb allows macros to have up to nine macro parameters, named @1,
@2, ..., @9. If a macro does not have a formal parameter list, it is defined to
have no parameters, and an actual parameter list must not appear at the point of
call. If a macro has a formal parameter list, it is defined to have one or more
parameters, and a corresponding actual parameter must be supplied for each
formal parameter, at the point of call.
Because FunnelWeb parameters have predictable names, the only information
1 Introduction
that a formal parameter list need convey is 
how many
  parameters a macro has.
2 Interface
For this reason a formal parameter list takes the form of the highest numbered
3 Scanner
formal parameter desired, enclosed in parentheses sequences.
4 Parser
5 Analyser
formal_parameter_list = "@(" formal_parameter "@)".
6 Tangle
formal_parameter = "@1" | "@2" | "@3" | "@4" | "@5" |
7 Weave
                   "@6" | "@7" | "@8" | "@9"
8 Shell
9 Commands
10 Glossary
11 References
Copyright   Ross N. Williams 1992,1999. All rights reserved.
http://www.ross.net/funnelweb/reference/parser_macros_params.html [3/3/2000 10:46:51 PM]

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