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/* bison -v -t --defines=cparse.h -o cparse.cpp cparse.ypp */
%{
#include <stdio.h>
#include "cparse_def.h"
extern "C" {
int yylex();
}
void
yyerror(const char *s)
{
printf("%s\n", s);
}
int level = 0;
int ndeact = 0;
char *ncomment = NULL;
char *nname = NULL;
char *nval = NULL;
void
print_node()
{
int i = 0;
if (ncomment) {
for (i = 0; i <= level; i++) {
printf(" ");
}
printf(" /*%s*/\n", ncomment);
}
printf("%s", ndeact ? "!" : " ");
for (i = 0; i <= level; i++) {
printf(" ");
}
printf("%s", nname);
if (nval) {
printf(" '%s'", nval);
}
printf("\n");
}
%}
%token NODE
%token VALUE
%token COMMENT
%token LEFTB
%token RIGHTB
%%
input: forest
| forest comment
;
forest: /* empty */
| forest tree
;
tree: node {
print_node();
}
| node {
print_node();
} LEFTB { ++level; } forest RIGHTB { --level; }
;
node: nodec {
nval = NULL;
}
| nodec VALUE {
nval = $2.str;
}
;
nodec: NODE {
ncomment = NULL;
nname = $1.str;
ndeact = $1.deactivated;
}
| COMMENT NODE {
ncomment = $1.str;
nname = $2.str;
ndeact = $2.deactivated;
}
;
comment: COMMENT
| comment COMMENT
;
%%
int
main()
{
return yyparse();
}
|
