{"id":467,"date":"2009-05-27T18:33:52","date_gmt":"2009-05-27T16:33:52","guid":{"rendered":"http:\/\/blog.m-ri.de\/?p=467"},"modified":"2009-05-27T11:34:09","modified_gmt":"2009-05-27T09:34:09","slug":"vc-2010-breaking-changes-in-der-stl","status":"publish","type":"post","link":"http:\/\/blog.m-ri.de\/index.php\/2009\/05\/27\/vc-2010-breaking-changes-in-der-stl\/","title":{"rendered":"VC-2010: Breaking Changes in der STL"},"content":{"rendered":"<p>Ich habe mein erstes gr\u00f6\u00dferes Projekt mal testweise in VS-2010 \u00fcbernommen und bin sofort \u00fcber ein Problem in der STL gestolpert. Ein <em>std::set&lt;FOO&gt;::iterator<\/em> liefert in VC-2010 jetzt eine <em>const FOO &amp;\u00a0<\/em>Referenz!<\/p>\n<p>Das \u00c4ndern von Objekten in einem <em>std::set<\/em> war sowieso nur erlaubt, wenn sich die Reihenfolge nicht \u00e4ndert.<\/p>\n<p>Die Folge ist, dass der nachfolgende Code in VC-2010 nicht mehr kompiliert.<\/p>\n<pre lang=\"cpp\">#include &lt;set&gt;\r\nstruct S_FOO\r\n{\r\n\u00a0\u00a0\u00a0\u00a0unsigned long\u00a0\u00a0\u00a0\u00a0 m_dw1, m_dw2;\r\n    \/\/ simplified sample without bool operator&lt;\r\n};\r\n\r\nclass CMySet : public std::set&lt;S_FOO&gt;\r\n{\r\npublic:\r\n\u00a0\u00a0\u00a0\u00a0void SomethingSpecial()\r\n\u00a0\u00a0\u00a0\u00a0{\r\n        \/\/ Order must not be changed!\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 for (iterator it=begin(); it!=end(); ++it)\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 it-&gt;m_dw1 = 0;\u00a0\u00a0 \/\/ &lt;----- C3892!\r\n\u00a0\u00a0\u00a0\u00a0}\r\n};\r\n\r\nint _tmain(int argc, _TCHAR* argv[])\r\n{\r\n\u00a0\u00a0\u00a0\u00a0CMySet myset;\r\n\u00a0\u00a0\u00a0\u00a0myset.SomethingSpecial();\r\n\u00a0\u00a0\u00a0\u00a0return 0;\r\n}<\/pre>\n<p>Man erh\u00e4lt den Fehler <em>C3892: &#8218;it&#8216; : you cannot assign to a variable that is const <\/em><\/p>\n<p>Das und noch einige andere Breaking Changes \u00a0wurden gestern in VC-Blog ver\u00f6ffentlicht:<\/p>\n<p><a href=\"http:\/\/blogs.msdn.com\/vcblog\/archive\/2009\/05\/25\/stl-breaking-changes-in-visual-studio-2010-beta-1.aspx\">http:\/\/blogs.msdn.com\/vcblog\/archive\/2009\/05\/25\/stl-breaking-changes-in-visual-studio-2010-beta-1.aspx<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ich habe mein erstes gr\u00f6\u00dferes Projekt mal testweise in VS-2010 \u00fcbernommen und bin sofort \u00fcber ein Problem in der STL gestolpert. Ein std::set&lt;FOO&gt;::iterator liefert in VC-2010 jetzt eine const FOO &amp;\u00a0Referenz! Das \u00c4ndern von Objekten in einem std::set war sowieso nur erlaubt, wenn sich die Reihenfolge nicht \u00e4ndert. Die Folge ist, dass der nachfolgende Code &hellip; <a href=\"http:\/\/blog.m-ri.de\/index.php\/2009\/05\/27\/vc-2010-breaking-changes-in-der-stl\/\" class=\"more-link\"><span class=\"screen-reader-text\">\u201eVC-2010: Breaking Changes in der STL\u201c <\/span>weiterlesen<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[30,3,172],"tags":[173,370,174,44,171],"class_list":["post-467","post","type-post","status-publish","format-standard","hentry","category-c","category-programmieren","category-vs2010","tag-breaking-changes","tag-c","tag-stl","tag-vs-2008","tag-vs-2010"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"http:\/\/blog.m-ri.de\/index.php\/wp-json\/wp\/v2\/posts\/467","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/blog.m-ri.de\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/blog.m-ri.de\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/blog.m-ri.de\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/blog.m-ri.de\/index.php\/wp-json\/wp\/v2\/comments?post=467"}],"version-history":[{"count":1,"href":"http:\/\/blog.m-ri.de\/index.php\/wp-json\/wp\/v2\/posts\/467\/revisions"}],"predecessor-version":[{"id":468,"href":"http:\/\/blog.m-ri.de\/index.php\/wp-json\/wp\/v2\/posts\/467\/revisions\/468"}],"wp:attachment":[{"href":"http:\/\/blog.m-ri.de\/index.php\/wp-json\/wp\/v2\/media?parent=467"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blog.m-ri.de\/index.php\/wp-json\/wp\/v2\/categories?post=467"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blog.m-ri.de\/index.php\/wp-json\/wp\/v2\/tags?post=467"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}