Introduce scope_operation

This adds class scope_operation, an implementation of OP_SCOPE.

gdb/ChangeLog
2021-03-08  Tom Tromey  <tom@tromey.com>

	* expop.h (class scope_operation): New.
	* eval.c (eval_op_scope): No longer static.
	(scope_operation::evaluate_for_address): New method.
	* ax-gdb.c (scope_operation::do_generate_ax): New method.

1 files changed, 36 insertions, 0 deletions

diff --git a/gdb/expop.h b/gdb/expop.h
index 1e58262..cd1a161 100644
--- a/gdb/expop.h
+++ b/gdb/expop.h
@@ -41,6 +41,11 @@ extern void gen_expr_structop (struct expression *exp,
 			       const char *name,
 			       struct agent_expr *ax, struct axs_value *value);
 
+extern struct value *eval_op_scope (struct type *expect_type,
+				    struct expression *exp,
+				    enum noside noside,
+				    struct type *type, const char *string);
+
 namespace expr
 {
 
@@ -415,6 +420,37 @@ private:
   float_data m_data;
 };
 
+class scope_operation
+  : public maybe_constant_operation<struct type *, std::string>
+{
+public:
+
+  using maybe_constant_operation::maybe_constant_operation;
+
+  value *evaluate (struct type *expect_type,
+		   struct expression *exp,
+		   enum noside noside) override
+  {
+    return eval_op_scope (expect_type, exp, noside,
+			  std::get<0> (m_storage),
+			  std::get<1> (m_storage).c_str ());
+  }
+
+  value *evaluate_for_address (struct expression *exp,
+			       enum noside noside) override;
+
+  enum exp_opcode opcode () const override
+  { return OP_SCOPE; }
+
+protected:
+
+  void do_generate_ax (struct expression *exp,
+		       struct agent_expr *ax,
+		       struct axs_value *value,
+		       struct type *cast_type)
+    override;
+};
+
 } /* namespace expr */
 
 #endif /* EXPOP_H */