Added tool bison++-1.21.11

1 files changed, 55 insertions, 0 deletions

diff --git a/tools/bison++/Example/MyParser.y b/tools/bison++/Example/MyParser.y
new file mode 100644
index 000000000..f8787eb34
--- /dev/null
+++ b/tools/bison++/Example/MyParser.y
@@ -0,0 +1,55 @@
+%{
+#define YY_MyParser_STYPE yy_MyParser_stype
+%}
+%name MyParser
+%define LSP_NEEDED
+%define ERROR_BODY =0
+%define LEX_BODY =0
+%header{
+#include <iostream>
+#include <string>
+  using namespace std;
+#define YY_DECL int yyFlexLexer::yylex(YY_MyParser_STYPE *val)
+#ifndef FLEXFIX
+#define FLEXFIX YY_MyParser_STYPE *val
+#define FLEXFIX2 val
+#endif
+%}
+
+%union {
+  int num;
+  bool statement;
+  }
+
+
+
+%token <num> PLUS INTEGER MINUS  AND OR NOT LPARA RPARA
+%token <statement> BOOLEAN
+%type <num> exp result
+%type <statement> bexp
+%start result
+
+%left OR
+%left AND
+%left PLUS MINUS
+%left NOT
+%left LPARA RPARA
+
+%%
+
+result          : exp {cout << "Result = " << $1 << endl;}
+                | bexp {cout << "Result = " << $1 << endl;}
+
+exp		: exp PLUS exp {$$ = $1 + $3;}
+       		| INTEGER {$$ = $1;}
+                | MINUS exp { $$ = -$2;}
+                | exp MINUS exp {$$ = $1 - $3;}
+
+bexp            : BOOLEAN {$$ = $1;}
+		| bexp AND bexp { $$ = $1 && $3;}
+		| bexp OR bexp { $$ = $1 || $3;}
+		| NOT bexp {$$ = !$2;}
+		| LPARA bexp RPARA {$$ = $2}
+%%
+/* -------------- body section -------------- */
+// feel free to add your own C/C++ code here