{"id":18418,"date":"2022-10-31T15:40:02","date_gmt":"2022-10-31T10:10:02","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-why-destructor-is-being-called-but-construction-not-being-called-when-passing-object-as-a-parameter-closed\/"},"modified":"2022-10-31T15:40:02","modified_gmt":"2022-10-31T10:10:02","slug":"solved-why-destructor-is-being-called-but-construction-not-being-called-when-passing-object-as-a-parameter-closed","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-why-destructor-is-being-called-but-construction-not-being-called-when-passing-object-as-a-parameter-closed\/","title":{"rendered":"[Solved] Why destructor is being called but construction not being called when passing object as a parameter? [closed]"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-28428345\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"28428345\" data-parentid=\"28427119\" data-score=\"1\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>Passing an instance of a class by value invokes the copy constructor.<\/p>\n<p>The compiler implements the copy constructor by default (essentially a memberwise copy after invoking copy constructors of any base classes) if the class definition does not explicitly supply one.   This compiler-generated copy constructor will not call one of the other constructors you have implemented, so constructing the copy will not print anything.   However, the destructor will be invoked to clean up the copy when done.<\/p>\n<p>Within your class, if you implement a copy constructor as follows;<\/p>\n<pre><code>Test(const Test &amp;from) : x(from.x)\n{\n    std::cout &lt;&lt; \"Copy constructor invoked\" &lt;&lt; std::endl;\n}\n<\/code><\/pre>\n<p>you will find that the copy constructor is indeed being invoked.<\/p>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\"><\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved Why destructor is being called but construction not being called when passing object as a parameter? [closed] <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] Passing an instance of a class by value invokes the copy constructor. The compiler implements the copy constructor by default (essentially a memberwise copy after invoking copy constructors of any base classes) if the class definition does not explicitly supply one. This compiler-generated copy constructor will not call one of the other constructors you &#8230; <a title=\"[Solved] Why destructor is being called but construction not being called when passing object as a parameter? [closed]\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-why-destructor-is-being-called-but-construction-not-being-called-when-passing-object-as-a-parameter-closed\/\" aria-label=\"More on [Solved] Why destructor is being called but construction not being called when passing object as a parameter? [closed]\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[324,528,965],"class_list":["post-18418","post","type-post","status-publish","format-standard","hentry","category-solved","tag-c","tag-constructor","tag-destructor"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>[Solved] Why destructor is being called but construction not being called when passing object as a parameter? 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This compiler-generated copy constructor will not call one of the other constructors you ... 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