Introduce complex_operation

This adds class complex_operation, which implements OP_COMPLEX.

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

	* expop.h (class complex_operation): New.

2 files changed, 25 insertions, 0 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 9297e8f..cd7ec19 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,9 @@
 2021-03-08  Tom Tromey  <tom@tromey.com>
 
+	* expop.h (class complex_operation): New.
+
+2021-03-08  Tom Tromey  <tom@tromey.com>
+
 	* eval.c (eval_op_objc_selector): No longer static.
 	* c-exp.h (class objc_selector_operation): New.
 
diff --git a/gdb/expop.h b/gdb/expop.h
index 0f5b504..9c63f12 100644
--- a/gdb/expop.h
+++ b/gdb/expop.h
@@ -765,6 +765,27 @@ protected:
     override;
 };
 
+class complex_operation
+  : public maybe_constant_operation<operation_up, operation_up, struct type *>
+{
+public:
+
+  using maybe_constant_operation::maybe_constant_operation;
+
+  value *evaluate (struct type *expect_type,
+		   struct expression *exp,
+		   enum noside noside) override
+  {
+    value *real = std::get<0> (m_storage)->evaluate (nullptr, exp, noside);
+    value *imag = std::get<1> (m_storage)->evaluate (nullptr, exp, noside);
+    return value_literal_complex (real, imag,
+				  std::get<2> (m_storage));
+  }
+
+  enum exp_opcode opcode () const override
+  { return OP_COMPLEX; }
+};
+
 } /* namespace expr */
 
 #endif /* EXPOP_H */