在名称空间行使职能,也就是在多个档案中加入这一正确方式吗?
测试。
#pragma once
#ifndef TEST
#define TEST
namespace test{
namespace {
bool test(){
return true;
}
}
}
#endif //TEST
在名称空间行使职能,也就是在多个档案中加入这一正确方式吗?
测试。
#pragma once
#ifndef TEST
#define TEST
namespace test{
namespace {
bool test(){
return true;
}
}
}
#endif //TEST
包括警卫名称<代码>TEST可能与其他一些宏观因素发生冲突,使用更详细的内容,如<代码>。 HEADENAME_H。
注:先强调后加上门的名字和包含两条连续强调的名称保留执行。
其次,如果你在标题档案中重新提出,功能定义需要<条码>。 否则,如果列入多个翻译单位,就会出现多重定义链接错误。 或者更正式地说,标准规则(统一定义规则)禁止这种多重定义,除非它们重新插入所有<条码>、条码/编码,并且实际上相同。
www.un.org/spanish/ga/president
匿名名称空间使每个翻译单位都有一个单独的名称空间,每个此类名称空间都有一个单独的(相同)功能定义,而不是像上文标语中解释的那样,仅仅使用<条码>。
Cheers & hth.,
Anonymous namespaces make all identifiers they wrap unique to the translation unit they are in. Putting an anonymous namespace into a header that will (sooner or later) be included in different translation units will result in all the identifiers defined in that anonymous namespace to be separately (but identically) in each translation unit.
我尚未看到有人想要这样做的情况。
是的。 因为它使你能够用同样的名字命名同样的物品,并且使这种名称简单。
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