[DO-981] qt package (!15)

Co-authored-by: aleksandr.vodyanov <aleksandr.vodyanov@avroid.tech>
Reviewed-on: https://git.avroid.tech/Conan/conan_build/pulls/15

recipes/bison/all/test_package/mc_parser.yy

@@ -0,0 +1,42 @@
+%{
+#include <iostream>
+#include <string>
+#include <map>
+#include <cstdlib> //-- I need this for atoi
+using namespace std;
+
+int yylex();
+int yyerror(const char *p) { cerr << "Error!" << endl; return 42; }
+%}
+
+%union {
+  int val;
+  char sym;
+};
+%token <val> NUM
+%token <sym> OPA OPM LP RP STOP
+%type  <val> exp term sfactor factor res
+
+%%
+run: res run | res    /* forces bison to process many stmts */
+
+res: exp STOP         { cout << $1 << endl; }
+
+exp: exp OPA term     { $$ = ($2 == '+' ? $1 + $3 : $1 - $3); }
+| term                { $$ = $1; }
+
+term: term OPM factor { $$ = ($2 == '*' ? $1 * $3 : $1 / $3); }
+| sfactor             { $$ = $1; }
+
+sfactor: OPA factor   { $$ = ($1 == '+' ? $2 : -$2); }
+| factor              { $$ = $1; }
+
+factor: NUM           { $$ = $1; }
+| LP exp RP           { $$ = $2; }
+
+%%
+int main()
+{
+    yyparse();
+    return 0;
+}