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Introduce decltype_operation
This adds class decltype_operation, which implements OP_DECLTYPE. gdb/ChangeLog 2021-03-08 Tom Tromey <tom@tromey.com> * expop.h (class decltype_operation): New.
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@ -1,3 +1,7 @@
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2021-03-08 Tom Tromey <tom@tromey.com>
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* expop.h (class decltype_operation): New.
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2021-03-08 Tom Tromey <tom@tromey.com>
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* expop.h (class typeof_operation): New.
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47
gdb/expop.h
47
gdb/expop.h
@ -1470,6 +1470,53 @@ public:
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{ return OP_TYPEOF; }
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};
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/* Implement 'decltype'. */
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class decltype_operation
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: public maybe_constant_operation<operation_up>
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{
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public:
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using maybe_constant_operation::maybe_constant_operation;
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value *evaluate (struct type *expect_type,
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struct expression *exp,
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enum noside noside) override
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{
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if (noside == EVAL_SKIP)
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return eval_skip_value (exp);
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else if (noside == EVAL_AVOID_SIDE_EFFECTS)
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{
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value *result
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= std::get<0> (m_storage)->evaluate (nullptr, exp,
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EVAL_AVOID_SIDE_EFFECTS);
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enum exp_opcode sub_op = std::get<0> (m_storage)->opcode ();
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if (sub_op == BINOP_SUBSCRIPT
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|| sub_op == STRUCTOP_MEMBER
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|| sub_op == STRUCTOP_MPTR
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|| sub_op == UNOP_IND
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|| sub_op == STRUCTOP_STRUCT
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|| sub_op == STRUCTOP_PTR
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|| sub_op == OP_SCOPE)
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{
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struct type *type = value_type (result);
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if (!TYPE_IS_REFERENCE (type))
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{
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type = lookup_lvalue_reference_type (type);
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result = allocate_value (type);
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}
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}
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return result;
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}
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else
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error (_("Attempt to use a type as an expression"));
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}
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enum exp_opcode opcode () const override
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{ return OP_DECLTYPE; }
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};
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} /* namespace expr */
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#endif /* EXPOP_H */
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