Added 'C_C++/bison/story.y'

C_C++/bison/story.y

@@ -0,0 +1,51 @@
+/* @BAKE
+    bison -Wcounterexamples --header=story.tab.h -o story.tab.c $@;
+    gcc story.tab.c -o story;
+    ./story;
+   @STOP
+*/
+%{
+#include <stdio.h>
+#include <stdlib.h>
+#include "story.tab.h"
+int yylex() {
+    static int i = 0;
+    const int my_story[] = {PLOT, PLOT, ACTION, BOSSFIGHT, 0};
+    //const int my_story[] = {PLOT, PLOT, ACTION, ACTION, 0};
+    //const int my_story[] = {0};
+    return my_story[i++];
+}
+void yyerror() {
+    puts("Not a story.");
+    exit(1);
+}
+%}
+%token BOOORING PLOT ACTION BOSSFIGHT
+%%
+
+story: start middle ending
+    ;
+
+start:  %empty
+    | BOOORING PLOT
+    ;
+
+submid: %empty
+    | submid ACTION
+    | submid PLOT
+    ;
+
+middle: submid ACTION
+    | submid PLOT
+    ;
+
+ending: %empty
+    | BOSSFIGHT
+    ;
+
+%%
+signed main() {
+    yyparse();
+    puts("It is a story.");
+    return 0;
+}