[v3,079/206] Introduce long_const_operation

Message ID 20210220201609.838264-80-tom@tromey.com
State New
Headers show
Series
  • Refactor expressions
Related show

Commit Message

Tom Tromey Feb. 20, 2021, 8:14 p.m.
This adds class long_const_operation, which holds a scalar constant.

gdb/ChangeLog
2021-02-20  Tom Tromey  <tom@tromey.com>

	* expop.h (class long_const_operation): New.
	* ax-gdb.c (long_const_operation::do_generate_ax): New method.
---
 gdb/ChangeLog |  5 +++++
 gdb/ax-gdb.c  | 10 ++++++++++
 gdb/expop.h   | 30 ++++++++++++++++++++++++++++++
 3 files changed, 45 insertions(+)

-- 
2.26.2

Patch

diff --git a/gdb/ax-gdb.c b/gdb/ax-gdb.c
index 6d568a71e03..7640b1ba925 100644
--- a/gdb/ax-gdb.c
+++ b/gdb/ax-gdb.c
@@ -2314,6 +2314,16 @@  scope_operation::do_generate_ax (struct expression *exp,
     error (_("There is no field named %s"), name.c_str ());
 }
 
+void
+long_const_operation::do_generate_ax (struct expression *exp,
+				      struct agent_expr *ax,
+				      struct axs_value *value,
+				      struct type *cast_type)
+{
+  gen_int_literal (ax, value, std::get<1> (m_storage),
+		   std::get<0> (m_storage));
+}
+
 }
 
 /* This handles the middle-to-right-side of code generation for binary
diff --git a/gdb/expop.h b/gdb/expop.h
index cd1a16172b8..ed883be6fc4 100644
--- a/gdb/expop.h
+++ b/gdb/expop.h
@@ -451,6 +451,36 @@  class scope_operation
     override;
 };
 
+class long_const_operation
+  : public tuple_holding_operation<struct type *, LONGEST>
+{
+public:
+
+  using tuple_holding_operation::tuple_holding_operation;
+
+  value *evaluate (struct type *expect_type,
+		   struct expression *exp,
+		   enum noside noside) override
+  {
+    return value_from_longest (std::get<0> (m_storage),
+			       std::get<1> (m_storage));
+  }
+
+  enum exp_opcode opcode () const override
+  { return OP_LONG; }
+
+  bool constant_p () const override
+  { return true; }
+
+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 */