锘??xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/"><channel><title>&#26085;&#26412;&#21152;&#21202;&#27604;&#20037;&#20037;&#31934;&#21697;&#44;&#20122;&#27954;&#65;&#86;&#26080;&#30721;&#20037;&#20037;&#23490;&#23518;&#23569;&#22919;&#44;&#20037;&#20037;&#20154;&#20154;&#38738;&#33609;&#57;&#55;&#39321;&#34121;</title><link>http://www.shnenglu.com/maxime/category/14144.html</link><description /><language>zh-cn</language><lastBuildDate>Mon, 28 Jun 2010 12:42:13 GMT</lastBuildDate><pubDate>Mon, 28 Jun 2010 12:42:13 GMT</pubDate><ttl>60</ttl><item><title>浠?WebKit 婧愪唬鐮佺湅鈥滅被鍨嬭瘑鍒�?/title><link>http://www.shnenglu.com/maxime/articles/118884.html</link><dc:creator>maxime</dc:creator><author>maxime</author><pubDate>Mon, 28 Jun 2010 12:21:00 GMT</pubDate><guid>http://www.shnenglu.com/maxime/articles/118884.html</guid><wfw:comment>http://www.shnenglu.com/maxime/comments/118884.html</wfw:comment><comments>http://www.shnenglu.com/maxime/articles/118884.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.shnenglu.com/maxime/comments/commentRss/118884.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/maxime/services/trackbacks/118884.html</trackback:ping><description><![CDATA[<p><br>闂鎻忚堪錛?br>&nbsp;&nbsp;&nbsp;鍦?C++ 闈㈠悜瀵硅薄緙栫▼涓紝甯稿父浼?xì)閬囧?#8220;綾誨瀷璇嗗埆&#8221;鐨勯渶姹傦細(xì)宸茬煡鏌愪釜瀵硅薄鐨勫熀綾誨瀷鎸囬拡錛岄渶瑕佽瘑鍒瀵硅薄鐨勬淳鐢熺被鍨嬶紝璁塊棶?huà)z劇敓綾誨瀷鐨勫叕鏈夊嚱鏁般�傜畝鍗曡灝辨槸錛屽皢鍩虹被鍨嬫寚閽堣漿鎹負(fù)媧劇敓綾誨瀷鎸囬拡錛屽茍鐢ㄦ潵璁塊棶?huà)z劇敓綾誨瀷鐨勫叕鏈夊嚱鏁般�?br><br>闂鍒嗘瀽錛?nbsp;<br>&nbsp;&nbsp;&nbsp;&#8220;綾誨瀷璇嗗埆&#8221;鏈川涓婃槸涓�涓粠鎶借薄杞負(fù)鍏瘋薄鐨勮繃紼嬶紝鐮村潖浜?jiǎn)瀵硅薄鎶借薄鎬с�傝櫧涓嶅�煎緱鎻愬�★紝浣嗗湪鍏瘋薄鍖栨儏鏅笅錛?#8220;綾誨瀷璇嗗埆&#8221;鍙堟槸蹇呴』鐨勩�?br>&nbsp;&nbsp;&nbsp;&#8220;綾誨瀷璇嗗埆&#8221;甯歌鏂規(guī)硶鏄己鍒剁被鍨嬭漿鎹€�傝繖闇�瑕佸厛瀹氫箟涓�涓?#8220;瀵硅薄綾誨瀷&#8221;鏋氫婦琛紝鍐嶅湪鍩虹被閲屽畾涔変竴涓繑鍥?#8220;瀵硅薄綾誨瀷&#8221;鐨勫嚱鏁般�傝繖縐嶆柟娉曠殑緙虹偣鏄捐�屾槗瑙侊細(xì)<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1. 闇�瑕佺淮鎶ゅ叏灞�鎬х殑&#8220;瀵硅薄綾誨瀷&#8221;鏋氫婦琛紱<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2. 鍚戝熀綾誨瀷鏋勯�犲嚱鏁頒紶鍏?#8220;瀵硅薄綾誨瀷&#8221;鍙傛暟錛?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3. 姣忔&#8220;綾誨瀷杞崲&#8221;鍓嶏紝鍏堣鑾峰緱&#8220;瀵硅薄綾誨瀷&#8221;鍊鹼紝鍒ゆ柇瀵硅薄綾誨瀷錛?br>&nbsp;&nbsp;&nbsp;&#8220;綾誨瀷璇嗗埆&#8221;鐨勫彟涓�縐嶆爣鍑嗘柟娉曟槸RTTI銆備綔涓轟竴欏?C++ 緙栬瘧閫夐」錛孯TTI 鐩存帴灝嗕笂榪板父瑙勬柟娉曟暀緇欑紪璇戝櫒鍋氫簡(jiǎn)銆傜劧鑰岋紝榪欐牱涔熸槸鏈夌己鐐圭殑錛?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1. RTTI浼?xì)寮曞叆棰濆鐨勫紑閿�銆傝繖鏄彲浠ョ悊瑙ｇ殑錛岄棶棰樻槸RTTI榪欑寮�閿�浼?xì)闄勫姞鍒版墍鏈夌被鍨嬩笂鍘伙紱<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2. RTTI瑕佹眰鎵�鏈夊簱閮戒互RTTI鏂瑰紡緙栬瘧錛屾墠鑳芥甯稿伐浣溿�傝�岀幇瀹炰笘鐣屾�繪槸澶嶆潅鐨勶紝榪欎竴鐐規(guī)湭蹇呮�繪槸鑳藉疄鐜幫紱<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3.&nbsp;涓漢璁や負(fù)RTTI鏄竴縐嶈繃浜庡艦寮忓寲鐨勪笢瑗匡紝榪濆弽浜?C++ 鐨勭畝媧佹�с�侀珮鏁堟�у師鍒欙紱<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4. 涓漢璁や負(fù)RTTI鐨勪綆灞傚艦寮忓寲鐨勪笢瑗匡紝寰堝鏃跺�欙紝鎴戜滑浠嶇劧闇�瑕佸畾涔変笉渚濊禆浜嶤++綾葷殑&#8220;瀵硅薄綾誨瀷&#8221;鏋氫婦琛紱<br>&nbsp;&nbsp;&nbsp;闃呰 WebKit 浠ｇ爜鏃訛紝鎴戠湅鍒頒簡(jiǎn)涓�縐嶅熀浜庤櫄鍑芥暟鐨?#8220;綾誨瀷璇嗗埆&#8221;鏂規(guī)硶錛屼唬鐮佸涓嬶細(xì)<br>&nbsp;&nbsp;&nbsp;class EventTarget {<br>&nbsp;&nbsp;&nbsp;public:<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; void ref() { refEventTarget(); }<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; void deref() { derefEventTarget(); }</p>
<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; virtual EventSource* toEventSource();<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; virtual MessagePort* toMessagePort();<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; virtual Node* toNode();<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; virtual DOMWindow* toDOMWindow();<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; virtual XMLHttpRequest* toXMLHttpRequest();<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; virtual XMLHttpRequestUpload* toXMLHttpRequestUpload();</p>
<p>&nbsp;鍦ㄥ熀綾諱腑錛屽畾涔夊悜媧劇敓綾誨瀷鐨勮漿鎹㈠嚱鏁幫紝騫朵笖榪斿洖涓篘ULL銆傛瘡涓淳鐢熺被鍨嬶紝閲嶆柊瀹炵幇鍚戣嚜韜漿鎹㈢殑杞崲鍑芥暟錛岃繑鍥炶嚜韜殑鎸囬拡銆傛垜鎰熻榪欑鏂規(guī)硶錛?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1. 闈炲父瀹夊叏錛屼嬌鐢ㄦ柟渚匡紱<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2. 鏁堢巼鐩稿姣旇緝楂橈紱<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3. 鐪佸嵈浜?jiǎn)鍏ㄥ眬鎬х殑&#8220;瀵硅薄綾誨瀷&#8221;鏋氫婦琛紝鍗村甫鏉ヤ簡(jiǎn)緇存姢鍩虹被&#8220;杞崲鍑芥暟&#8221;鐨勮礋鎷咃紱<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4. 閫犳垚浜?jiǎn)鍩壕c誨媧劇敓綾葷殑渚濊禆鎬э紝浼間箮涓嶅お濂姐�?br><br>&nbsp;&nbsp;&nbsp;鍦ㄤ笂榪版柟娉曠殑鍩虹涓婏紝璁炬兂浜?jiǎn)涓�縐嶆敼榪涚殑鏂規(guī)硶錛岃璁″師鍒欐槸&#8220;浠庡熀綾誨瀷鍚戞淳鐢熺被鍨嬭漿鎹㈢殑鍑芥暟錛屽簲璇ユ斁緗湪媧劇敓綾諱腑錛屼互闈?rùn)鎬佸嚱鏁扮殑鏂瑰紡瀹氫箟&#8221;銆傚叿浣撴柟娉曞涓嬶細(xì)<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1. 鍩虹被瀹氫箟 void* toXXXX()&nbsp;鍜?bool isXXXX() 涓や釜縐佹湁铏氬嚱鏁幫紝鐢ㄧ紪紼嬭鑼冭瀹氾紝紱佹媧劇敓綾葷洿鎺ヨ闂畠浠�?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2. 媧劇敓綾婚噸瀹氫箟涓婅堪鍑芥暟銆?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3. 媧劇敓綾誨瀷瀹氫箟 XXXX* toType(Base*) 鍜?bool isType(Base*)涓や釜闈?rùn)鎬佸嚱鏁幫紝鍐呴儴瀹炵幇灝辨槸閫氳繃涓婅堪縐佹湁铏氬嚱鏁板畬鎴愮殑銆?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4. 鎵�鏈夌殑&#8220;綾誨瀷璇嗗埆鎿嶄綔&#8221;閮戒嬌鐢ㄤ笂榪伴潤(rùn)鎬佸嚱鏁板畬鎴愩�?br></p>
闂灝忕粨錛?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;涓婅堪鍥涚鏂瑰紡錛屽緢闅捐鍝竴縐嶆柟寮忔洿濂斤紝瀹滃叿浣撴儏鍐靛叿浣撳寰呫�?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 鎴戞湰浜哄亸鍚戜簬錛屼嬌鐢ㄦ渶鍚庝竴縐嶆柟寮忎綔涓篊++緙栫▼瑙勮寖鍜屾ā寮忥紝鍥犱負(fù)錛屽畠鏇存槸涓�縐嶆帴鍙ｈ鑼冿紝鍏跺唴閮ㄥ疄鐜板彲浠ユ敼涓哄墠涓夌鏂規(guī)硶涓殑浠諱綍涓�縐嶃�傝嚦浜庡畠甯︽潵鐨勪簺璁稿伐浣滈噺錛屾垜璁や負(fù)錛屽湪瀹冩垚涓轟竴縐嶅伐浣滆鑼冨悗錛岄偅浜涘皯閲忎唬鐮佷粎浠呭彧鏄竴鐐圭偣娌℃湁闅懼害鐨勬満姊版�х紪紼嬶紝瀹屽叏鍙互蹇界暐涓嶈銆傚鏋滀笉浠嬫剰鍦ㄤ唬鐮佷腑浣跨敤瀹忔満鍒訛紝閭ｄ箞鏇村彲浠ョ敤瀹忔潵瀹炵幇錛岄偅涔堝彧闇�瀹氫箟緙栬瘧瀹忓氨鑳藉氨鍦ㄤ笁縐嶆柟寮忎箣闂翠換鎰忓垏鎹€�?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;鏈�鍚庝竴縐嶆柟寮忥紝浣撶幇浜?jiǎn)涓�縐嶇瓥鐣ワ細(xì)褰撲綘鎯充負(fù)鍩虹被瀹氫箟涓�浜涗笌媧劇敓綾葷浉鍏崇殑宸ュ叿鍑芥暟鏃訛紝鍊掍笉濡傚皢鍏跺畾涔変負(fù)媧劇敓綾葷殑闈?rùn)鎬佸嚱鏁幫紝浠ラ伩鍏嶆淳鐢熺被鍨嬪鍩虹被鍨嬬殑&#8220;姹℃煋&#8221;銆?br><br>
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