diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/cparse/cparse.ypp | 31 |
1 files changed, 20 insertions, 11 deletions
diff --git a/src/cparse/cparse.ypp b/src/cparse/cparse.ypp index 23a63b2..66ddfd3 100644 --- a/src/cparse/cparse.ypp +++ b/src/cparse/cparse.ypp @@ -9,6 +9,14 @@ #include "cparse.hpp" #include "cparse_def.h" +/* to enable tracing, define ENABLE_PARSER_TRACE. may also want to invoke + * bison with "-v" (by changing Makefile.am). + */ +#undef ENABLE_PARSER_TRACE +#ifdef ENABLE_PARSER_TRACE +#define YYDEBUG 1 +#endif // ENABLE_PARSER_TRACE + using namespace std; using namespace cnode; @@ -129,18 +137,11 @@ go_up() %% -input: forest - | forest comment +input: forest comment ; forest: /* empty */ - | forest { - if (!cur_parent) { - // root node - cur_parent = new CfgNode(pcomps, nname, nval, ncomment, - ndeact, cstore); - } - } tree + | forest tree ; tree: node { @@ -175,8 +176,8 @@ nodec: NODE { } ; -comment: COMMENT - | comment COMMENT +comment: /* empty */ + | COMMENT comment ; %% @@ -184,8 +185,16 @@ comment: COMMENT CfgNode * cparse::parse_file(FILE *fin, Cstore& cs) { + // for debug (see prologue) +#ifdef ENABLE_PARSER_TRACE + cparse_debug = 1; +#endif // ENABLE_PARSER_TRACE + cparse_set_in(fin); cstore = &cs; + + // root node + cur_parent = new CfgNode(pcomps, nname, nval, ncomment, ndeact, cstore); if (cparse_parse() != 0) { // parsing failed return NULL; |