Add native Windows binary for bison.

bison/src/bison/2.4.1/bison-2.4.1-src/examples/calc++/calc++-parser.yy

+#line 8420 "../../doc/bison.texinfo"
+%skeleton "lalr1.cc"                          /*  -*- C++ -*- */
+%require "2.4.1"
+%defines
+%define parser_class_name "calcxx_parser"
+#line 8438 "../../doc/bison.texinfo"
+%code requires {
+# include <string>
+class calcxx_driver;
+}
+#line 8451 "../../doc/bison.texinfo"
+// The parsing context.
+%parse-param { calcxx_driver& driver }
+%lex-param   { calcxx_driver& driver }
+#line 8464 "../../doc/bison.texinfo"
+%locations
+%initial-action
+{
+  // Initialize the initial location.
+  @$.begin.filename = @$.end.filename = &driver.file;
+};
+#line 8478 "../../doc/bison.texinfo"
+%debug
+%error-verbose
+#line 8488 "../../doc/bison.texinfo"
+// Symbols.
+%union
+{
+  int          ival;
+  std::string *sval;
+};
+#line 8503 "../../doc/bison.texinfo"
+%code {
+# include "calc++-driver.hh"
+}
+#line 8518 "../../doc/bison.texinfo"
+%token        END      0 "end of file"
+%token        ASSIGN     ":="
+%token <sval> IDENTIFIER "identifier"
+%token <ival> NUMBER     "number"
+%type  <ival> exp
+#line 8532 "../../doc/bison.texinfo"
+%printer    { debug_stream () << *$$; } "identifier"
+%destructor { delete $$; } "identifier"
+
+%printer    { debug_stream () << $$; } <ival>
+#line 8543 "../../doc/bison.texinfo"
+%%
+%start unit;
+unit: assignments exp  { driver.result = $2; };
+
+assignments: assignments assignment {}
+           | /* Nothing.  */        {};
+
+assignment:
+     "identifier" ":=" exp
+       { driver.variables[*$1] = $3; delete $1; };
+
+%left '+' '-';
+%left '*' '/';
+exp: exp '+' exp   { $$ = $1 + $3; }
+   | exp '-' exp   { $$ = $1 - $3; }
+   | exp '*' exp   { $$ = $1 * $3; }
+   | exp '/' exp   { $$ = $1 / $3; }
+   | "identifier"  { $$ = driver.variables[*$1]; delete $1; }
+   | "number"      { $$ = $1; };
+%%
+#line 8571 "../../doc/bison.texinfo"
+void
+yy::calcxx_parser::error (const yy::calcxx_parser::location_type& l,
+                          const std::string& m)
+{
+  driver.error (l, m);
+}