[antlr-interest] The match rule c++ grammar define preproc directives

[Serge Bakkal]

Hi , Im investigating c++ grammar enhancements to handle preprocessor
#define directives
everything works well when the define directive has no parameter (tricky but
works smooth )

Now the next thing is handling define arguments :
It appears that arguments can be can be of almost any kind , say :

#define TEST(a,b) a \
                               b

int s(int a,int b){return a+b;}

void theTest()
{
 TEST(\
  int s = \
\
  ::s(0,1);,
    const char *_1 = "we have to handle it";
  )

   TEST( int (*S)(int,int) = ::s; , const char *_2 = "we have to handle it
too"; )

}

must both (amo ) be handled coreectly .

The most straightforward  solution seems the is to use in that case
a second lexer : it has to handle any character until  the next COMMA
or RPAREN is encountered provided that COMMA is not within a LPRAREN RPAREN
statement
and the RPAREN is not a LPAREN match :

How should the rule be written ?

TIA

Serge Bakkal


 

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