I think the best soulution would be like you suggested to add the '$'
character to the valid basic source character set to allow identifiers
containeing a $. I therefore tested out how different major compilers
and versions of these compilers handle this. The following compilers
and versions of the compilers allow a '$' character within the
identifiers (of macros):<br>
<br>
gcc 2.95, 3.1, 3.2, 3.3.3, 3.4.3 and 4.0.2<br>
icc (intel c compiler) 8.0, 8.1<br>
<br>
I would corroborate for the fact that it seems like there is some
traction for allowing '$' characters within identifiers in major
compiler preprocessors.<br>
<br>
I have not been able to reproduce the error you got with GCC or with
any other compiler . Which compiler and version did you use when you
got your error message?<br>
<br>
Thanks<br>
Andreas<br>
<br>
&nbsp;<br><div><span class="gmail_quote">On 11/18/05, <b class="gmail_sendername">Hartmut Kaiser</b> &lt;<a href="mailto:hartmut.kaiser@gmail.com">hartmut.kaiser@gmail.com</a>&gt; wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>Andreas Sæbjørnsen wrote:<br><br>&gt; When preprocessing the code<br>&gt; #define $jack int test;<br>&gt; $jack<br>&gt; using any preprocessor using the wave library, in this case<br>&gt; the samples/lexed_tokens/lexed_tokens preprocessor , gives
<br>&gt; the following error:<br>&gt;<br>&gt; PP_DEFINE&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(#369) at test.C (&nbsp;&nbsp;1/ 1): &gt;#define&lt;<br>&gt; SPACE&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(#393) at test.C (&nbsp;&nbsp;1/ 8): &gt; &lt;<br>&gt; lexed_tokens:<br>&gt; /home/saebjornsen1/projects/boost/boost/wave/token_ids.hpp:497
<br>&gt; : boost::wave::util::flex_string&lt;char,<br>&gt; std::char_traits&lt;char&gt;, std::allocator&lt;char&gt;,<br>&gt; boost::wave::util::CowString&lt;boost::wave::util::AllocatorStrin<br>&gt; gStorage&lt;char, std::allocator&lt;char&gt; &gt;, char*&gt; &gt;
<br>&gt; boost::wave::get_token_name(boost::wave::token_id): Assertion<br>&gt; `id &lt; T_LAST_TOKEN-T_FIRST_TOKEN' failed.<br>&gt; Aborted<br>&gt;<br>&gt; using the preprocesor cpp (from the gcc team) I get (as cpp test.C
):<br>&gt; # 1 &quot;test.C&quot;<br>&gt; # 1 &quot;&lt;built-in&gt;&quot;<br>&gt; # 1 &quot;&lt;command line&gt;&quot;<br>&gt; # 1 &quot;test.C&quot;<br>&gt;<br>&gt; int test;<br>&gt;<br>&gt; I believe the problem lies in that the lexer does not
<br>&gt; recognize the '$'&nbsp;&nbsp;as a valid&nbsp;&nbsp;character&nbsp;&nbsp;within the name of<br>&gt; macro definition.<br><br>Accordingly to the Standard the '$' character is _not_ part of the basic<br>source character set (see 2.2.1 [lex.charset
]). For this reason it won't get<br>recognized as the part of a identifier.<br><br>I fixed the lexed_tokens sample (actually the Wave library) so you won't get<br>an assertion anymore, but a meaningful output. Now the output is:
<br><br>PP_DEFINE&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(#369) at test.cpp (&nbsp;&nbsp;1/ 1): &gt;#define&lt;<br>SPACE&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(#393) at test.cpp (&nbsp;&nbsp;1/ 8): &gt; &lt;<br>&lt;UnknownToken&gt;&nbsp;&nbsp; (#36 ) at test.cpp (&nbsp;&nbsp;1/ 9): &gt;$&lt;<br>IDENTIFIER&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (#381) at 
test.cpp (&nbsp;&nbsp;1/10): &gt;jack&lt;<br>SPACE&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(#393) at test.cpp (&nbsp;&nbsp;1/14): &gt; &lt;<br>INT&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(#335)
at test.cpp (&nbsp;&nbsp;1/15): &gt;int&lt;<br>SPACE&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(#393) at test.cpp (&nbsp;&nbsp;1/18): &gt; &lt;<br>IDENTIFIER&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (#381) at test.cpp (&nbsp;&nbsp;1/19): &gt;test&lt;<br>SEMICOLON&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(#297) at test.cpp (&nbsp;&nbsp;1/23): &gt;;&lt;<br>NEWLINE&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(#395) at 
test.cpp (&nbsp;&nbsp;1/24): &gt;\n&lt;<br>NEWLINE&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(#395) at test.cpp (&nbsp;&nbsp;2/ 1): &gt;\n&lt;<br>&lt;UnknownToken&gt;&nbsp;&nbsp; (#36 ) at test.cpp (&nbsp;&nbsp;3/ 1): &gt;$&lt;<br>IDENTIFIER&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (#381) at test.cpp (&nbsp;&nbsp;3/ 2): &gt;jack&lt;<br>NEWLINE&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(#395) at 
test.cpp (&nbsp;&nbsp;3/ 6): &gt;\n&lt;<br><br>BTW: when using the wave driver for the code given above you get:<br><br>&nbsp;&nbsp;&nbsp;&nbsp;test.cpp(1): error: ill formed preprocessor directive: #define<br><br>What certainly could be done additionally is to add the '$' character to the
<br>valid basic source character set to allow identifiers conatining a '$', but<br>this weakens the Standards conformance of Wave. Any suggestions?<br><br>HTH<br>Regards Hartmut<br><br><br><br>_______________________________________________
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</a><br></blockquote></div><br>