/[m4]/m4/doc/m4.texinfo
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revision 1.16 by gary, Fri Jun 27 12:18:51 2003 UTC revision 1.17 by gary, Fri Jun 27 14:00:25 2003 UTC
# Line 2039  Characters that close the argument list Line 2039  Characters that close the argument list
2039  Characters that separate the arguments of a macro call.  Default  Characters that separate the arguments of a macro call.  Default
2040  is @kbd{,}.  is @kbd{,}.
2041    
2042    @item Dollar
2043    Characters that can introduce an argument reference in the body of a
2044    macro.  Default is @kbd{$}.
2045    
2046  @item Other  @item Other
2047  Characters that have no special syntactical meaning to @code{m4}.  Characters that have no special syntactical meaning to @code{m4}.
2048  Default is all characters expect those in the categories above.  Default is all characters expect those in the categories above.
# Line 2100  Open parenthesis Line 2104  Open parenthesis
2104  Close parenthesis  Close parenthesis
2105  @item ,  @item ,
2106  Argument separator  Argument separator
2107    @item $
2108    Dollar
2109  @item O  @item O
2110  Other  Other
2111  @item @@  @item @@
# Line 2171  test(a, b, c) Line 2177  test(a, b, c)
2177  @end example  @end example
2178    
2179  @noindent  @noindent
2180  It is not yet possible to redefine the @samp{$} used to indicate macro  It is possible to redefine the @samp{$} used to indicate macro arguments
2181  arguments in user defined macros.  in user defined macros.
2182    
2183    @example
2184    define(`argref', `Dollar: $#, Question: ?#')
2185    @result{}
2186    argref(1, 2, 3)
2187    @result{}Dollar: 3, Question: ?#
2188    changesyntax(`$?', `O$')
2189    @result{}
2190    argref(1,2,3)
2191    @result{}Dollar: $#, Question: 3
2192    @end example
2193    
2194    @noindent
2195    Dollar class syntax elements are copied to the output if there is no
2196    valid expansion.
2197    
2198    @example
2199    define(`escape', `$?`'1$?1?')
2200    @result{}
2201    changesyntax(`$?')
2202    @result{}
2203    escape(foo)
2204    @result{}$?1$foo?
2205    @end example
2206    
2207  Macro calls can be given a @TeX{} or Texinfo like syntax using an  Macro calls can be given a @TeX{} or Texinfo like syntax using an
2208  escape.  If one or more characters are defined as escapes macro names  escape.  If one or more characters are defined as escapes macro names

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