• <ins id="pjuwb"></ins>
    <blockquote id="pjuwb"><pre id="pjuwb"></pre></blockquote>

    <noscript id="pjuwb"></noscript>
          <sup id="pjuwb"><pre id="pjuwb"></pre></sup>

            <dd id="pjuwb"></dd>
            <abbr id="pjuwb"></abbr>
            

    
            

            




            







												


        

            健康，快樂，勇敢的寧帥！！
            

            努力、努力、再努力！
沒有什么能阻止我對知識的渴望。
            

             
            
			
            
				
					
	
            
		
            
			"C++Templates The Complete Guide"讀書筆記----Chapter 3
		
            
		Chapter 3 Class Templates
            1. A clas template is a class that is implemented with one or more type parameters left open
            #include?<vector>
            #include?            <stdexcept>

            template?            <typename?T>
            class?Stack?{
            ??            private:
            ????std::vector            <T>?elems;?????//?elements

            ??            public:
            ????            void?push(T?const&);??????//?push?element
            ????void?pop();???????????????//?pop?element
            ????T?top()?const;????????????//?return?top?element
            ????bool?empty()?const?{??????//?return?whether?the?stack?is?empty
            ????????return?elems.empty();
            ????}
            }            ;

            template?            <typename?T>
            void?Stack<T>::push?(T?const&?elem)
            {
            ????elems.push_back(elem);????            //?append?copy?of?passed?elem
            }

            template            <typename?T>
            void?Stack<T>::pop?()
            {
            ????            if?(elems.empty())?{
            ????????            throw?std::out_of_range("Stack<>::pop():?empty?stack");
            ????}
            ????elems.pop_back();?????????            //?remove?last?element
            }

            template?            <typename?T>
            T?Stack            <T>::top?()?const
            {
            ????            if?(elems.empty())?{
            ????????            throw?std::out_of_range("Stack<>::top():?empty?stack");
            ????}
            ????            return?elems.back();??????//?return?copy?of?last?element
            }
            2. To use a class template, you pass the open types as template arguments. The class template is the instantiated(and compiled) for these types
            3. For class templates, only those menber funcitons that are called are instantiated
            This , of course, saves time and space. It has the additional benefit that you can instantiate a class even for those types that cannot perform all the operations of all the menber functions, as long as these member functions are not called.
            Note that you have to put whitespace between the two closing? template brackets. If you don't do this, you are using operator>>,which results in a syntax error:
            Stack<Stack<int>>?intStackStack;?//ERROR:>>is?not?allowed
            4. You can specialize calss templates for certain types
            template<>
            class?Stack<std::string>?{
            ??            private:
            ????std::deque            <std::string>?elems;??//?elements

            ??            public:
            ????            void?push(std::string?const&);??//?push?element
            ????void?pop();?????????????????????//?pop?element
            ????std::string?top()?const;????????//?return?top?element
            ????bool?empty()?const?{????????????//?return?whether?the?stack?is?empty
            ????????return?elems.empty();
            ????}
            }            ;

            void?Stack<std::string>::push?(std::string?const&?elem)
            {
            ????elems.push_back(elem);????            //?append?copy?of?passed?elem
            }

            void?Stack<std::string>::pop?()
            {
            ????            if?(elems.empty())?{
            ????????            throw?std::out_of_range
            ????????????????(            "Stack<std::string>::pop():?empty?stack");
            ????}
            ????elems.pop_back();?????????            //?remove?last?element
            }

            std::            string?Stack<std::string>::top?()?const
            {
            ????            if?(elems.empty())?{
            ????????            throw?std::out_of_range
            ????????????????(            "Stack<std::string>::top():?empty?stack");
            ????}
            ????            return?elems.back();??????//?return?copy?of?last?element
            }

            ps：也就是所謂的特定版本，模板元編程中的關鍵。
            5. You can partially specialize class templates for certain types
            If more than one partial specilalization matches equally well, the declaration is ambiguous
            6. You can define default values for class template parameters.These may refer to previous template parameters
		
            
			posted on 2006-11-26 16:15 ningfangli 閱讀(166) 評論(0)  編輯 收藏 引用  
		
            
	
            
	
	


	


            
	    
    




            






            

				
			
            
			
            
				
					

            導航
            

					

            統(tǒng)計
            
	
					

            公告
            
	
Dict.CN 在線詞典, 英語學習, 在線翻譯
 


					


            常用鏈接
            


            留言簿(4)
            


		
            隨筆檔案
            
		
				
			
	
		
            文章分類
            
		
				
			
	
		
            文章檔案
            
		
				
			
	



            搜索
            



            最新評論
	
            

            
	
			
		

            


            閱讀排行榜
            



            評論排行榜
            


				
			
            			
			

	
    
    







            
	   
	



国产99久久久久久免费看|
欧美久久一级内射wwwwww.|
亚洲国产精品综合久久一线|
亚洲欧洲精品成人久久曰影片|
久久婷婷五月综合成人D啪|
国产午夜精品久久久久免费视|
久久国产免费观看精品|
伊人色综合久久天天人守人婷|
久久综合给合久久狠狠狠97色|
99久久伊人精品综合观看|
久久这里有精品|
91久久精品国产免费直播|
99久久综合国产精品免费
|
亚洲国产精品成人AV无码久久综合影院|
三级片免费观看久久|
久久精品人人做人人爽97|
久久高清一级毛片|
狠狠色丁香婷综合久久|
99久久香蕉国产线看观香|
国产精品永久久久久久久久久|
日韩精品久久无码人妻中文字幕|
久久久久国产精品三级网|
97久久天天综合色天天综合色hd|
久久精品国产免费观看|
久久午夜综合久久|
久久99国产精品成人欧美|
国产精品久久99|
99久久精品日本一区二区免费|
97精品依人久久久大香线蕉97|
久久婷婷五月综合成人D啪|
国産精品久久久久久久|
精品国产一区二区三区久久蜜臀
|
国产精品综合久久第一页|
国产精品无码久久久久久|
99精品久久久久久久婷婷|
精品无码久久久久国产动漫3d|
麻豆av久久av盛宴av|
少妇精品久久久一区二区三区
|
精品久久久久久久久免费影院|
2021国内精品久久久久久影院|
久久无码高潮喷水|