{"id":4263,"date":"2019-05-10T12:36:20","date_gmt":"2019-05-10T11:36:20","guid":{"rendered":"http:\/\/roboblog.fatal-fury.de\/?p=4263"},"modified":"2019-05-10T12:36:20","modified_gmt":"2019-05-10T11:36:20","slug":"c-guns-c20-class-types-in-non-type-template-parameters","status":"publish","type":"post","link":"http:\/\/roboblog.fatal-fury.de\/?p=4263","title":{"rendered":"C++ Guns: C++20 class types in non-type template parameters"},"content":{"rendered":"<p>Mit C++20 und GCC9 wir k\u00f6nnen als Template Parameter nun auch einfach eigenen Typen angeben. Ohne uns mit Workarounds herumschlagen zu m\u00fcssen.<\/p>\n<p>Ein einfaches Beispiel sollte es verdeutlichen<\/p>\n<pre class=\"brush: cpp; title: ; notranslate\" title=\"\">\r\nstruct MyType {\r\n    int value;\r\n};\r\n\r\ntemplate&lt;MyType x&gt;\r\nauto func2() {\r\n  return x.value;\r\n} \r\n\r\nauto func3() {\r\n    func2&lt;MyType{1}&gt;();\r\n    constexpr MyType x{2};\r\n    return func2&lt;x&gt;();\r\n}\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Mit C++20 und GCC9 wir k\u00f6nnen als Template Parameter nun auch einfach eigenen Typen angeben. Ohne uns mit Workarounds herumschlagen zu m\u00fcssen. Ein einfaches Beispiel sollte es verdeutlichen struct MyType { int value; }; template&lt;MyType x&gt; auto func2() { return x.value; } auto func3() { func2&lt;MyType{1}&gt;(); constexpr MyType x{2}; return func2&lt;x&gt;(); }<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[17],"class_list":["post-4263","post","type-post","status-publish","format-standard","hentry","category-allgemein","tag-cpp"],"_links":{"self":[{"href":"http:\/\/roboblog.fatal-fury.de\/index.php?rest_route=\/wp\/v2\/posts\/4263","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/roboblog.fatal-fury.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/roboblog.fatal-fury.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/roboblog.fatal-fury.de\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/roboblog.fatal-fury.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4263"}],"version-history":[{"count":1,"href":"http:\/\/roboblog.fatal-fury.de\/index.php?rest_route=\/wp\/v2\/posts\/4263\/revisions"}],"predecessor-version":[{"id":4264,"href":"http:\/\/roboblog.fatal-fury.de\/index.php?rest_route=\/wp\/v2\/posts\/4263\/revisions\/4264"}],"wp:attachment":[{"href":"http:\/\/roboblog.fatal-fury.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4263"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/roboblog.fatal-fury.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4263"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/roboblog.fatal-fury.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4263"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}