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[81.250.175.67]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-422870e9145sm62391955e9.22.2024.06.13.06.33.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 13 Jun 2024 06:33:53 -0700 (PDT) From: =?UTF-8?q?Marc=20Poulhi=C3=A8s?= To: gcc-patches@gcc.gnu.org Cc: Javier Miranda Subject: [COMMITTED 05/30] ada: Missing support for 'Old with overloaded function Date: Thu, 13 Jun 2024 15:33:11 +0200 Message-ID: <20240613133338.1809385-5-poulhies@adacore.com> X-Mailer: git-send-email 2.45.1 In-Reply-To: <20240613133338.1809385-1-poulhies@adacore.com> References: <20240613133338.1809385-1-poulhies@adacore.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-13.3 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,GIT_PATCH_0,KAM_ASCII_DIVIDERS,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS,TXREP,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: From: Javier Miranda The compiler reports an error when the prefix of 'Old is a call to an overloaded function that has no parameters. gcc/ada/ * sem_attr.adb (Analyze_Attribute): Enhance support for using 'Old with a prefix that references an overloaded function that has no parameters; add missing support for the use of 'Old within qualified expressions. * sem_util.ads (Preanalyze_And_Resolve_Without_Errors): New subprogram. * sem_util.adb (Preanalyze_And_Resolve_Without_Errors): New subprogram. Tested on x86_64-pc-linux-gnu, committed on master. --- gcc/ada/sem_attr.adb | 37 ++++++++++++++++++++++++++++++++++++- gcc/ada/sem_util.adb | 12 ++++++++++++ gcc/ada/sem_util.ads | 3 +++ 3 files changed, 51 insertions(+), 1 deletion(-) diff --git a/gcc/ada/sem_attr.adb b/gcc/ada/sem_attr.adb index 2fd95f36d65..22fbca45ac5 100644 --- a/gcc/ada/sem_attr.adb +++ b/gcc/ada/sem_attr.adb @@ -5534,7 +5534,42 @@ package body Sem_Attr is -- The prefix must be preanalyzed as the full analysis will take -- place during expansion. - Preanalyze_And_Resolve (P); + -- If the attribute reference has an expected type or shall resolve + -- to a given type, the same applies to the prefix; otherwise the + -- prefix shall be resolved independently of context (RM 6.1.1(8/5)). + + if Nkind (Parent (N)) = N_Qualified_Expression then + Preanalyze_And_Resolve (P, Etype (Parent (N))); + + -- An special case occurs when the prefix is an overloaded function + -- call without formals; in order to identify such case we preanalyze + -- a duplicate of the prefix ignoring errors. + + else + declare + P_Copy : constant Node_Id := New_Copy_Tree (P); + + begin + Set_Parent (P_Copy, Parent (P)); + + Preanalyze_And_Resolve_Without_Errors (P_Copy); + + -- In the special case of a call to an overloaded function + -- without extra formals we resolve it using its returned + -- type (which is the unique valid call); if this not the + -- case we will report the error later, as part of the + -- regular analysis of the full expression. + + if Nkind (P_Copy) = N_Function_Call + and then Is_Overloaded (Name (P_Copy)) + and then No (First_Formal (Entity (Name (P_Copy)))) + then + Preanalyze_And_Resolve (P, Etype (Name (P_Copy))); + else + Preanalyze_And_Resolve (P); + end if; + end; + end if; -- Ensure that the prefix does not contain attributes 'Old or 'Result diff --git a/gcc/ada/sem_util.adb b/gcc/ada/sem_util.adb index 5bea088c44e..438dea79977 100644 --- a/gcc/ada/sem_util.adb +++ b/gcc/ada/sem_util.adb @@ -25790,6 +25790,18 @@ package body Sem_Util is return Kind; end Policy_In_Effect; + ------------------------------------------- + -- Preanalyze_And_Resolve_Without_Errors -- + ------------------------------------------- + + procedure Preanalyze_And_Resolve_Without_Errors (N : Node_Id) is + Status : constant Boolean := Get_Ignore_Errors; + begin + Set_Ignore_Errors (True); + Preanalyze_And_Resolve (N); + Set_Ignore_Errors (Status); + end Preanalyze_And_Resolve_Without_Errors; + ------------------------------- -- Preanalyze_Without_Errors -- ------------------------------- diff --git a/gcc/ada/sem_util.ads b/gcc/ada/sem_util.ads index f282d1fad99..bda295f0a7f 100644 --- a/gcc/ada/sem_util.ads +++ b/gcc/ada/sem_util.ads @@ -3388,6 +3388,9 @@ package Sem_Util is function Yields_Universal_Type (N : Node_Id) return Boolean; -- Determine whether unanalyzed node N yields a universal type + procedure Preanalyze_And_Resolve_Without_Errors (N : Node_Id); + -- Preanalyze and resolve N without reporting errors + procedure Preanalyze_Without_Errors (N : Node_Id); -- Preanalyze N without reporting errors -- 2.45.1