Node:Ltcalc Decls, Next:Ltcalc Rules, Up:Location Tracking Calc

Declarations for ltcalc

The C and Bison declarations for the location tracking calculator are the same as the declarations for the infix notation calculator.

/* Location tracking calculator.  */

%{
#define YYSTYPE int
#include <math.h>
%}

/* Bison declarations.  */
%token NUM

%left '-' '+'
%left '*' '/'
%left NEG
%right '^'

%% /* Grammar follows */

Note there are no declarations specific to locations. Defining a data type for storing locations is not needed: we will use the type provided by default (see Data Types of Locations), which is a four member structure with the following integer fields: first_line, first_column, last_line and last_column.