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GET /api/1.2/patches/807230/?format=api
{ "id": 807230, "url": "http://patchwork.ozlabs.org/api/1.2/patches/807230/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/patch/CADzB+2=sscZo=kL38X9bGZR9TCdQc0C9cokDOTnhyJsoaxxoUQ@mail.gmail.com/", "project": { "id": 17, "url": "http://patchwork.ozlabs.org/api/1.2/projects/17/?format=api", "name": "GNU Compiler Collection", "link_name": "gcc", "list_id": "gcc-patches.gcc.gnu.org", "list_email": "gcc-patches@gcc.gnu.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<CADzB+2=sscZo=kL38X9bGZR9TCdQc0C9cokDOTnhyJsoaxxoUQ@mail.gmail.com>", "list_archive_url": null, "date": "2017-08-29T18:49:13", "name": "C++ PATCH to allow copying of local_specializations", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "92a51fac3b344c69d28f25188e0fb58ee3bd4527", "submitter": { "id": 4337, "url": "http://patchwork.ozlabs.org/api/1.2/people/4337/?format=api", "name": "Jason Merrill", "email": "jason@redhat.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/gcc/patch/CADzB+2=sscZo=kL38X9bGZR9TCdQc0C9cokDOTnhyJsoaxxoUQ@mail.gmail.com/mbox/", "series": [ { "id": 437, "url": "http://patchwork.ozlabs.org/api/1.2/series/437/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/list/?series=437", "date": "2017-08-29T18:49:13", "name": "C++ PATCH to allow copying of local_specializations", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/437/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/807230/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/807230/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<gcc-patches-return-461109-incoming=patchwork.ozlabs.org@gcc.gnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": [ "patchwork-incoming@bilbo.ozlabs.org", "mailing list gcc-patches@gcc.gnu.org" ], "Authentication-Results": [ "ozlabs.org;\n\tspf=pass (mailfrom) smtp.mailfrom=gcc.gnu.org\n\t(client-ip=209.132.180.131; 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boundary=\"001a113fc2b64c31250557e8df8b\"", "X-IsSubscribed": "yes" }, "content": "When instantiating a lambda-expression in the new model, we want to\nretain the local_specializations from the enclosing function but still\nbe able to remember specializations local to the lambda and discard\nthem afterwards. With this patch a local_specialization_stack object\ncan start with a copy of the enclosing map.\n\nTested x86_64-pc-linux-gnu, applying to trunk.\ncommit aa72ed613b20715d171287c643f611b7c30b3f12\nAuthor: Jason Merrill <jason@redhat.com>\nDate: Tue Jul 11 17:32:21 2017 -0400\n\n Support copying local_specializations.\n \n * cp-tree.h (enum lss_policy): New.\n (local_specialization_stack): Add policy parameter to default ctor.\n * pt.c (local_specialization_stack): Copy local_specializations if\n lss_copy.", "diff": "diff --git a/gcc/cp/cp-tree.h b/gcc/cp/cp-tree.h\nindex f0eafb3..a58e7bd 100644\n--- a/gcc/cp/cp-tree.h\n+++ b/gcc/cp/cp-tree.h\n@@ -5117,9 +5117,10 @@ enum unification_kind_t {\n // An RAII class used to create a new pointer map for local\n // specializations. When the stack goes out of scope, the\n // previous pointer map is restored.\n+enum lss_policy { lss_blank, lss_copy };\n struct local_specialization_stack\n {\n- local_specialization_stack ();\n+ local_specialization_stack (lss_policy = lss_blank);\n ~local_specialization_stack ();\n \n hash_map<tree, tree> *saved;\ndiff --git a/gcc/cp/pt.c b/gcc/cp/pt.c\nindex 847cd68..416d17b 100644\n--- a/gcc/cp/pt.c\n+++ b/gcc/cp/pt.c\n@@ -77,10 +77,13 @@ static tree cur_stmt_expr;\n //\n // Implementation of the RAII helper for creating new local\n // specializations.\n-local_specialization_stack::local_specialization_stack ()\n+local_specialization_stack::local_specialization_stack (lss_policy policy)\n : saved (local_specializations)\n {\n- local_specializations = new hash_map<tree, tree>;\n+ if (policy == lss_blank || !saved)\n+ local_specializations = new hash_map<tree, tree>;\n+ else\n+ local_specializations = new hash_map<tree, tree>(*saved);\n }\n \n local_specialization_stack::~local_specialization_stack ()\n", "prefixes": [] }