Add ast_expression_bin subclass of ast_expression

The ast_expression_bin subclass is used for all binary expressions
such as addition, subtraction, and comparisons.  Several other
subclasses are soon to follow.

1 files changed, 10 insertions, 0 deletions

diff --git a/ast.h b/ast.h
index 591655d06c..1f659933e9 100644
--- a/ast.h
+++ b/ast.h
@@ -159,6 +159,8 @@ public:
    ast_expression(int oper, ast_expression *,
 		  ast_expression *, ast_expression *);
 
+   static const char *operator_string(enum ast_operators op);
+
    virtual void print(void) const;
 
    enum ast_operators oper;
@@ -180,6 +182,14 @@ public:
    struct simple_node expressions;
 };
 
+class ast_expression_bin : public ast_expression {
+public:
+   ast_expression_bin(int oper, ast_expression *, ast_expression *);
+
+   virtual void print(void) const;
+};
+
+
 /**
  * Number of possible operators for an ast_expression
  *