[binutils-gdb] Introduce bool_operation

[Tom Tromey]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=e6985c5e45ef0693005e21a25d847baf0f93c965

commit e6985c5e45ef0693005e21a25d847baf0f93c965
Author: Tom Tromey <tom@tromey.com>
Date:   Mon Mar 8 07:27:57 2021 -0700

    Introduce bool_operation
    
    This adds class bool_operation, which implements OP_BOOL.
    
    gdb/ChangeLog
    2021-03-08  Tom Tromey  <tom@tromey.com>
    
            * expop.h (class bool_operation): New.

Diff:
---
 gdb/ChangeLog |  4 ++++
 gdb/expop.h   | 22 ++++++++++++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 0633260cb5a..9acaee4c152 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,7 @@
+2021-03-08  Tom Tromey  <tom@tromey.com>
+
+	* expop.h (class bool_operation): New.
+
 2021-03-08  Tom Tromey  <tom@tromey.com>
 
 	* expop.h (class register_operation): New.
diff --git a/gdb/expop.h b/gdb/expop.h
index a0e00302532..44098b84761 100644
--- a/gdb/expop.h
+++ b/gdb/expop.h
@@ -627,6 +627,28 @@ protected:
     override;
 };
 
+class bool_operation
+  : public tuple_holding_operation<bool>
+{
+public:
+
+  using tuple_holding_operation::tuple_holding_operation;
+
+  value *evaluate (struct type *expect_type,
+		   struct expression *exp,
+		   enum noside noside) override
+  {
+    struct type *type = language_bool_type (exp->language_defn, exp->gdbarch);
+    return value_from_longest (type, std::get<0> (m_storage));
+  }
+
+  enum exp_opcode opcode () const override
+  { return OP_BOOL; }
+
+  bool constant_p () const override
+  { return true; }
+};
+
 } /* namespace expr */
 
 #endif /* EXPOP_H */