[PATCH 155/203] Introduce ada_bitwise_operation

Tom Tromey
2021-01-01T21:49:25Z

This adds class ada_bitwise_operation, which is used to implement the
Ada bitwise operators.

gdb/ChangeLog
2021-01-01 Tom Tromey <tom@tromey.com>

* ada-exp.h (ada_bitwise_operation): New template class.
(ada_bitwise_and_operation, ada_bitwise_ior_operation)
(ada_bitwise_xor_operation): New typedefs.
---
gdb/ChangeLog | 6 ++++++
gdb/ada-exp.h | 27 +++++++++++++++++++++++++++
2 files changed, 33 insertions(+)

diff --git a/gdb/ada-exp.h b/gdb/ada-exp.h
index 3091323c89e..d8f18b9c61f 100644
--- a/gdb/ada-exp.h
+++ b/gdb/ada-exp.h
@@ -186,6 +186,33 @@ class ada_binop_equal_operation
{ return std::get<0> (m_storage); }
};

+/* Bitwise operators for Ada. */
+template<enum exp_opcode OP>
+class ada_bitwise_operation
+ : public maybe_constant_operation<operation_up, operation_up>
+{
+public:
+
+ using maybe_constant_operation::maybe_constant_operation;
+
+ value *evaluate (struct type *expect_type,
+ struct expression *exp,
+ enum noside noside) override
+ {
+ value *lhs = std::get<0> (m_storage)->evaluate (nullptr, exp, noside);
+ value *rhs = std::get<1> (m_storage)->evaluate (nullptr, exp, noside);
+ value *result = eval_op_binary (expect_type, exp, noside, OP, lhs, rhs);
+ return value_cast (value_type (lhs), result);
+ }
+
+ enum exp_opcode opcode () const override
+ { return OP; }
+};
+
+using ada_bitwise_and_operation = ada_bitwise_operation<BINOP_BITWISE_AND>;
+using ada_bitwise_ior_operation = ada_bitwise_operation<BINOP_BITWISE_IOR>;
+using ada_bitwise_xor_operation = ada_bitwise_operation<BINOP_BITWISE_XOR>;
+
} /* namespace expr */

#endif /* ADA_EXP_H */
--
2.26.2