[Boost-bugs] [Boost C++ Libraries] #7677: add_macro_definition("TEST=") behaves different than #define TEST

Subject: [Boost-bugs] [Boost C++ Libraries] #7677: add_macro_definition("TEST=") behaves different than #define TEST
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-11-10 06:16:04

#7677: add_macro_definition("TEST=") behaves different than #define TEST
--------------------------------------+-------------------------------------
 Reporter:  klaus.guetter@…           |       Owner:  hkaiser
     Type:  Bugs                      |      Status:  new    
Milestone:  To Be Determined          |   Component:  wave   
  Version:  Boost 1.52.0              |    Severity:  Problem
 Keywords:                            |  
--------------------------------------+-------------------------------------
 Test1 posted below produces:

 INT
 SPACE
 EOF
 SPACE
 IDENTIFIER
 SEMICOLON
 NEWLINE
 EOF

 While Test2 produces:

 INT
 SPACE
 IDENTIFIER
 SEMICOLON
 NEWLINE
 EOF

 The EOF in the third line of Test1 output is produced by the TEST macro
 expansion.
 If this expected behaviour? I found this surprising.
 (MSVC10, Boost 1.51)


 ----
 Code:


 {{{
 typedef cpplexer::lex_token<> token_type;
 typedef context<
     string::iterator,
     cpplexer::lex_iterator<token_type>
     > lexer_context_type;

 void Test1()
 {
   string instring("int TEST x;\n");
   lexer_context_type ctx(instring.begin(), instring.end(), "");
   ctx.set_language(language_support(support_c99));
   ctx.add_macro_definition("TEST=");

   for (lexer_context_type::iterator_type it = ctx.begin(); it !=
 ctx.end(); ++it)
     cout << get_token_name(token_id(*it)) << endl;
 }

 void Test2()
 {
   string instring("#define TEST\nint TEST x;\n");
   lexer_context_type ctx(instring.begin(), instring.end(), "");
   ctx.set_language(language_support(support_c99));

   for (lexer_context_type::iterator_type it = ctx.begin(); it !=
 ctx.end(); ++it)
     cout << get_token_name(token_id(*it)) << endl;
 }
 }}}

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/7677>
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