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bh=dhzrau85xdmP1IPWUCLe4lN8lq+ED584TcLEMvKX0FU=; b=RUn3nVvI1lOGeA0AS49ncYAcTk /yfAKa6R2CvlGjuc3UEXZqhluyWy1kw4OPtJT0rDoIyhtZ1PnHkBFxMPpiXX3YVaQa9RbCPJAKoqM QQYfj97wmqfvL1120/KdWb6XA; Received: from 97-122-81-39.hlrn.qwest.net ([97.122.81.39]:60408 helo=localhost.localdomain) by box5379.bluehost.com with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1kvSHS-0029b0-JX for gdb-patches@sourceware.org; Fri, 01 Jan 2021 14:48:18 -0700 From: Tom Tromey To: gdb-patches@sourceware.org Subject: [PATCH 109/203] Introduce decltype_operation Date: Fri, 1 Jan 2021 14:45:49 -0700 Message-Id: <20210101214723.1784144-110-tom@tromey.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210101214723.1784144-1-tom@tromey.com> References: <20210101214723.1784144-1-tom@tromey.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - box5379.bluehost.com X-AntiAbuse: Original Domain - sourceware.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - tromey.com X-BWhitelist: no X-Source-IP: 97.122.81.39 X-Source-L: No X-Exim-ID: 1kvSHS-0029b0-JX X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: 97-122-81-39.hlrn.qwest.net (localhost.localdomain) [97.122.81.39]:60408 X-Source-Auth: tom+tromey.com X-Email-Count: 110 X-Source-Cap: ZWx5bnJvYmk7ZWx5bnJvYmk7Ym94NTM3OS5ibHVlaG9zdC5jb20= X-Local-Domain: yes X-BeenThere: gdb-patches@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gdb-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: gdb-patches-bounces@sourceware.org Sender: "Gdb-patches" This adds class decltype_operation, which implements OP_DECLTYPE. gdb/ChangeLog 2021-01-01 Tom Tromey * expop.h (class decltype_operation): New. --- gdb/ChangeLog | 4 ++++ gdb/expop.h | 47 +++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 51 insertions(+) diff --git a/gdb/expop.h b/gdb/expop.h index 502ad71d067..ba107f10ba0 100644 --- a/gdb/expop.h +++ b/gdb/expop.h @@ -1459,6 +1459,53 @@ class typeof_operation { return OP_TYPEOF; } }; +/* Implement 'decltype'. */ +class decltype_operation + : public maybe_constant_operation +{ +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 */ -- 2.26.2