10.1.1 C++ Bison Interface

The C++ parser LALR(1) skeleton is named ‘lalr1.cc’. To select it, you may either pass the option ‘--skeleton=lalr1.cc’ to Bison, or include the directive ‘%skeleton "lalr1.cc"’ in the grammar preamble. When run, bison will create several entities in the ‘yy’ namespace. Use the ‘%name-prefix’ directive to change the namespace name, see Bison Declaration Summary. The various classes are generated in the following files:

‘position.hh’

‘location.hh’

The definition of the classes position and location, used for location tracking. See section C++ Location Values.

‘stack.hh’

An auxiliary class stack used by the parser.

‘file.hh’

‘file.cc’

(Assuming the extension of the input file was ‘.yy’.) The declaration and implementation of the C++ parser class. The basename and extension of these two files follow the same rules as with regular C parsers (see section Invoking Bison).

The header is mandatory; you must either pass ‘-d’/‘--defines’ to bison, or use the ‘%defines’ directive.

All these files are documented using Doxygen; run doxygen for a complete and accurate documentation.