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author | Tom Tromey <tom@tromey.com> | 2021-03-08 07:27:57 -0700 |
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committer | Tom Tromey <tom@tromey.com> | 2021-03-08 07:28:22 -0700 |
commit | 0af8829eb1aea4fa72f1a0a2c7c749c411c8ed41 (patch) | |
tree | 2876e6a11f15bbd8343769a414930d65632ede21 /gdb/expop.h | |
parent | 4efc574cb9e721c1e29425146d6f51424a730729 (diff) | |
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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.
Diffstat (limited to 'gdb/expop.h')
-rw-r--r-- | gdb/expop.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/gdb/expop.h b/gdb/expop.h index da74359..1831378 100644 --- a/gdb/expop.h +++ b/gdb/expop.h @@ -1470,6 +1470,53 @@ public: { return OP_TYPEOF; } }; +/* Implement 'decltype'. */ +class decltype_operation + : public maybe_constant_operation<operation_up> +{ +public: + + using maybe_constant_operation::maybe_constant_operation; + + value *evaluate (struct type *expect_type, + struct expression *exp, + enum noside noside) override + { + if (noside == EVAL_SKIP) + return eval_skip_value (exp); + else if (noside == EVAL_AVOID_SIDE_EFFECTS) + { + value *result + = std::get<0> (m_storage)->evaluate (nullptr, exp, + EVAL_AVOID_SIDE_EFFECTS); + enum exp_opcode sub_op = std::get<0> (m_storage)->opcode (); + if (sub_op == BINOP_SUBSCRIPT + || sub_op == STRUCTOP_MEMBER + || sub_op == STRUCTOP_MPTR + || sub_op == UNOP_IND + || sub_op == STRUCTOP_STRUCT + || sub_op == STRUCTOP_PTR + || sub_op == OP_SCOPE) + { + struct type *type = value_type (result); + + if (!TYPE_IS_REFERENCE (type)) + { + type = lookup_lvalue_reference_type (type); + result = allocate_value (type); + } + } + + return result; + } + else + error (_("Attempt to use a type as an expression")); + } + + enum exp_opcode opcode () const override + { return OP_DECLTYPE; } +}; + } /* namespace expr */ #endif /* EXPOP_H */ |