> On 2 Oct 2016, at 05:14, Juan Ceasar <juan.d.cea...@gmail.com> wrote:
> I’m writing a Bison parser and, being relatively new to this, I’m confused
> about how to tie my scanner (for flex) together with my bison (version 3.04
> so I can use C++) parser.
There is a calculator example in the Bison distribution, and also in the
manual, you might check out. It also shows how to use locations for error
reporting.
> And so I’m a little confused, I could of course declare LBRACE and so forth
> as tokens in the parser.y,
Yes, all tokens are declared in the gramma file, which is .yy for C++, which
defines the token names that the lexer will use. These are macro names for C,
but in a enum for C++, so if one has declared say
%token LP "(")
the lexer rules end with
return token::LP;
> But then, how does that tie in with the flex scanner??
Then the lexer must read these by:
%{ /* -*- C++ -*- */
...
#include "parser.hh"
...
%}
The C++ calculator example also includes a file "driver.hh".
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