{"id":9992,"date":"2021-02-15T10:39:09","date_gmt":"2021-02-15T10:39:09","guid":{"rendered":"http:\/\/www.max-sperling.bplaced.net\/?p=9992"},"modified":"2024-05-28T08:04:44","modified_gmt":"2024-05-28T08:04:44","slug":"declaration-specifiers-c","status":"publish","type":"post","link":"http:\/\/www.max-sperling.bplaced.net\/?p=9992","title":{"rendered":"Declaration specifiers (C++)"},"content":{"rendered":"

The following list is just a selection.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Specifier<\/th>\nVariable<\/th>\nFunction<\/th>\n<\/tr>\n
const<\/th>\nCan’t be modified.1<\/sup><\/td>\nMethod: Can’t modify its fields.1<\/sup><\/td>\n<\/tr>\n
constexp<\/th>\nCalculation happens (if possible) during compile time.2<\/sup><\/td>\n<\/tr>\n
extern<\/th>\nGlobal: Can be defined in another translation unit.3<\/sup><\/td>\n<\/tr>\n
final<\/th>\n<\/td>\nMethod: Can’t be overridden in a derived class.<\/td>\n<\/tr>\n
inline<\/th>\n<\/td>\nCode gets inserted at calling spots.4<\/sup><\/td>\n<\/tr>\n
mutable<\/th>\nField: Modifiable, even if object is const.<\/td>\n<\/td>\n<\/tr>\n
noexcept<\/th>\n<\/td>\nShall not throw an exception.5<\/sup><\/td>\n<\/tr>\n
override<\/th>\n<\/td>\nMethod: Overrides a virtual method of a base class.<\/td>\n<\/tr>\n
static<\/th>\nField \/ Method: Part of the class, not the objects.
Global: Restricts the visibility to its translation unit.<\/td>\n<\/tr>\n
Local: Stays alive after leaving the scope.<\/td>\n<\/td>\n<\/tr>\n
thread_local<\/th>\nLocal: Like static, but each thread has its own.<\/td>\n<\/td>\n<\/tr>\n
virtual<\/th>\n<\/td>\nMethod: Overridable in inheriting classes.<\/td>\n<\/tr>\n
volatile<\/th>\nNo compiler optimization allowed.6<\/sup><\/td>\n<\/td>\n<\/tr>\n<\/table>\n

1<\/sup> Exception: Fields with mutable
\n2<\/sup> Faster run time, slower compile time.
\n3<\/sup> Default for non-const vars and funcs.
\n4<\/sup> Better performance, larger binary.
\n5<\/sup> Else std::terminate() gets executed.
\n6<\/sup> Worse performance, always right value.<\/p>\n","protected":false},"excerpt":{"rendered":"

The following list is just a selection. Specifier Variable Function const Can’t be modified.1 Method: Can’t modify its fields.1 constexp<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false},"categories":[27],"tags":[],"_links":{"self":[{"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/posts\/9992"}],"collection":[{"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=9992"}],"version-history":[{"count":14,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/posts\/9992\/revisions"}],"predecessor-version":[{"id":17636,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/posts\/9992\/revisions\/17636"}],"wp:attachment":[{"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9992"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9992"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9992"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}