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[130.44.159.43]) by smtp.gmail.com with ESMTPSA id y6-20020a05622a120600b003b2d890752dsm2051814qtx.88.2023.01.24.14.11.27 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 24 Jan 2023 14:11:27 -0800 (PST) From: Jason Merrill To: gcc-patches@gcc.gnu.org Subject: [pushed] c++: "" #pragma at BOF [PR108504] Date: Tue, 24 Jan 2023 17:11:23 -0500 Message-Id: <20230124221123.299474-1-jason@redhat.com> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="US-ASCII"; x-default=true X-Spam-Status: No, score=-12.5 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,GIT_PATCH_0,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_NONE,TXREP 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: Tested x86_64-pc-linux-gnu, applying to trunk. -- 8< -- Since r11-2095 we pass flags to cp_lexer_get_preprocessor_token, and cp_lexer_new_main passes C_LEX_STRING_NO_JOIN when lexing most of the translation unit, but doesn't do that for the very first token; as a result, if the first token is a string literal, we try to join strings and get confused if that encounters a pragma. PR c++/108504 gcc/cp/ChangeLog: * parser.cc (cp_lexer_new_main): Pass C_LEX_STRING_NO_JOIN for first token, too. gcc/testsuite/ChangeLog: * g++.dg/ext/pragma1.C: New test. --- gcc/cp/parser.cc | 2 +- gcc/testsuite/g++.dg/ext/pragma1.C | 4 ++++ 2 files changed, 5 insertions(+), 1 deletion(-) create mode 100644 gcc/testsuite/g++.dg/ext/pragma1.C diff --git a/gcc/cp/parser.cc b/gcc/cp/parser.cc index b38c22e9a3d..07ec0e14491 100644 --- a/gcc/cp/parser.cc +++ b/gcc/cp/parser.cc @@ -705,7 +705,7 @@ cp_lexer_new_main (void) /* It's possible that parsing the first pragma will load a PCH file, which is a GC collection point. So we have to do that before allocating any memory. */ - cp_lexer_get_preprocessor_token (0, &token); + cp_lexer_get_preprocessor_token (C_LEX_STRING_NO_JOIN, &token); cp_parser_initial_pragma (&token); c_common_no_more_pch (); diff --git a/gcc/testsuite/g++.dg/ext/pragma1.C b/gcc/testsuite/g++.dg/ext/pragma1.C new file mode 100644 index 00000000000..bb258dac9a7 --- /dev/null +++ b/gcc/testsuite/g++.dg/ext/pragma1.C @@ -0,0 +1,4 @@ +// PR c++/108504 + +"1" // { dg-error "" } +#pragma GCC diagnostic push base-commit: 049a52909075117f5112971cc83952af2a818bc1 -- 2.31.1