c++ - compiling flex and bison into cpp -

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Usually, when we compile .l and .y files, then we should get .tab.h, .tab.c And .yy files are available, however, they need to be used in C ++ environments with these types which are only available in C ++, how can you modify your code so that it can be done?

You can compile using your trusted files in the C ++ compiler, then you will get the whole thing Do not write again.

If you want to go to "full C ++", then continue reading.

For Flex , you need to specify % option c ++ in the file - yyclass = NAME You can also change the name of the generated C ++ lexer using line logic.

For the Bison , just follow these instructions if you want to insert the C ++ code in the input file, then you can call it C ++ - such extensions (.ypp or . ++), then the Bison will follow you exten-sion to name the output file (.cpp or .c ++). For example, a grammatical description file named parse.yxx will generate the generated parser in a file named parse.tab.cxx, instead of yacc y.tab.c or parse.tab.c of the old bison version.

PS: Keep in mind that c ++ and reentrant options are mutually exclusive in flex.


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