obcl/parse.y (raw)
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%{ #include "obcl.h" int yylex(void); void yyerror(char *msg, ...); extern int yylineno; extern char *yytext; GList *config; /* this is what we parse into */ %} %union { double num; gchar *string; CLNode *node; GList *glist; }; %token <num> TOK_NUM %token <string> TOK_ID TOK_STRING %token TOK_SEP %type <glist> config %type <glist> stmts %type <node> stmt %type <glist> list %type <glist> block %type <node> value %expect 2 /* for now */ %% config: stmts { config = $$ = $1; } ; stmts: { $$ = NULL; } | stmt { $$ = g_list_append(NULL, $1); } | stmts stmt { $$ = g_list_append($1, $2); } ; stmt: TOK_ID list ';' { CLNode *s = g_new(CLNode,1); s->type = CL_LIST; s->u.lb.list = $2; s->u.lb.id = $1; $$ = s; } | TOK_ID list block { CLNode *s = g_new(CLNode,1); s->type = CL_LISTBLOCK; s->u.lb.list = $2; s->u.lb.block = $3; s->u.lb.id = $1; $$ = s; } | TOK_ID block { CLNode *s = g_new(CLNode,1); s->type = CL_BLOCK; s->u.lb.block = $2; s->u.lb.id = $1; $$ = s; } ; list: value { $$ = g_list_append(NULL, $1); } | list ',' value { $$ = g_list_append($1, $3); } ; block: '{' stmts '}' { $$ = $2; } ; value: TOK_ID { CLNode *node = g_new(CLNode,1); node->type = CL_ID; node->u.str = $1; $$ = node; } | TOK_STRING { CLNode *node = g_new(CLNode,1); node->type = CL_STR; node->u.str = $1; $$ = node; } | TOK_NUM { CLNode *node = g_new(CLNode,1); node->type = CL_NUM; node->u.num = $1; $$ = node; } ; %% int yywrap() { return 1; } /* void yyerror(const char *err) */ /* { */ /* fprintf(stderr, "Parse error on line %d, near '%s': %s\n", */ /* yylineno, yytext, err); */ /* } */ void yyerror(char *msg, ...) { va_list args; va_start(args,msg); fprintf(stderr, "Error on line %d, near '%s': ", yylineno, yytext); vfprintf(stderr, msg, args); fprintf(stderr,"\n"); va_end(args); } GList *cl_parse_fh(FILE *fh) { extern FILE *yyin; yyin = fh; yyparse(); return config; } |