调用构造函数？

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任何人都知道调用构造函数的方法吗？ 首先，我要发布以下代码并询问它是否完全 便携式和所有，但它不会编译。 #include< cstdlib> class AnyClass {}; int main（） { AnyClass& blah = * static_cast< AnyClass *> （std :: malloc（sizeof（AnyClass）））; blah.AnyClass（）; //正常使用 blah .~AnyClass（）; std :: free（& blah）; } G ++给出了愚蠢的回复： mem.cpp：在函数`int main（）''中： mem.cpp：14：调用类型`AnyClass''就像一个方法 有没有人知道编译器对错误提供有意义的解释 和警告？它不一定要产生任何东西，只需 分析代码并给出错误和警告，以及一个有用的 解释。 -JKop

解决方案

JKop发布：

任何人都知道调用构造函数的方法吗？ 首先，我要发布以下内容代码并询问如果它是完全可移植的全部，但它不会编译。 #include< cstdlib> class AnyClass {} ; int main（） { AnyClass& blah = * static_cast< AnyClass *> （std :: malloc（sizeof（AnyClass）））; blah.AnyClass（）; //正常工作 blah .~AnyClass（）; std :: free（& blah）; } G ++给出了愚蠢的回复： mem.cpp：在函数`int main（）''中： mem.cpp：14：调用类型`AnyClass''之类的方法 有没有人知道编译器为错误和警告提供有意义的解释？它并不一定要产生任何东西，只需分析即可。代码并给出错误和警告，以及一个有用的解释。 -JKop

如果我能得到它以某种方式工作，它是否适用于具有多态函数的 类？ -JKop

JKop发布：

JKop发布：

任何人都知道调用构造函数的方法吗？ 首先，我打算发布下面的代码并询问，如果它是完全可移植的，但是它不会编译。 #include< cstdlib> class AnyClass {}; int main（） { AnyClass& blah = * static_cast< AnyClass *> （std :: malloc（sizeof（AnyClass）））; blah.AnyClass（）; //正常工作 blah .~AnyClass（）; std :: free（& blah）; } G ++给出了愚蠢的回复： mem.cpp：在函数`int main（）''中： mem.cpp：14：调用类型`AnyClass''之类的方法 有没有人知道编译器为错误和警告提供有意义的解释？它并不一定要产生任何东西，只需分析即可。代码并给出错误和警告，以及一个有用的解释。 -JKop

如果我能以某种方式工作，它会与具有多态函数的类一起工作吗？ -JKop

更正 虚拟功能 -JKop

* JKop写道：

任何人都知道一种方式调用构造函数？ 首先，我将发布以下代码，并询问它是否完全可移植等等，但它无法编译。 #include< cstdlib> class AnyClass {}; int main（） { AnyClass& blah = * static_cast< AnyClass *> （std :: malloc（sizeof（AnyClass）））; blah.AnyClass（）;

AnyClass& blah = * new（std :: malloc（sizeof（AnyClass）））AnyClass; - Robert Bauck Hamar

Anyone know a way of calling a constructor? At first, I was going to post the following code and ask if it was fully portable and all, but then it wouldn''t compile. #include <cstdlib> class AnyClass {}; int main() { AnyClass& blah = *static_cast<AnyClass*> ( std::malloc( sizeof(AnyClass) ) ); blah.AnyClass(); //Work with it as normal blah.~AnyClass(); std::free(&blah); } G++ gives the stupid reply: mem.cpp: In function `int main()'': mem.cpp:14: calling type `AnyClass'' like a method Does anyone know of a compiler that gives meaningful explanations for errors and warnings? It doesn''t necessarily have to produce anything, just "analyzes" the code and gives the errors and warnings, along with a helpful explanation. -JKop

解决方案

JKop posted:

Anyone know a way of calling a constructor? At first, I was going to post the following code and ask if it was fully portable and all, but then it wouldn''t compile. #include <cstdlib> class AnyClass {}; int main() { AnyClass& blah = *static_cast<AnyClass*> ( std::malloc( sizeof(AnyClass) ) ); blah.AnyClass(); //Work with it as normal blah.~AnyClass(); std::free(&blah); } G++ gives the stupid reply: mem.cpp: In function `int main()'': mem.cpp:14: calling type `AnyClass'' like a method Does anyone know of a compiler that gives meaningful explanations for errors and warnings? It doesn''t necessarily have to produce anything, just "analyzes" the code and gives the errors and warnings, along with a helpful explanation. -JKop

If I could get that to somehow work, would it work with classes that have polymorphic functions? -JKop

JKop posted:

JKop posted:

Anyone know a way of calling a constructor? At first, I was going to post the following code and ask if it was fully portable and all, but then it wouldn''t compile. #include <cstdlib> class AnyClass {}; int main() { AnyClass& blah = *static_cast<AnyClass*> ( std::malloc( sizeof(AnyClass) ) ); blah.AnyClass(); //Work with it as normal blah.~AnyClass(); std::free(&blah); } G++ gives the stupid reply: mem.cpp: In function `int main()'': mem.cpp:14: calling type `AnyClass'' like a method Does anyone know of a compiler that gives meaningful explanations for errors and warnings? It doesn''t necessarily have to produce anything, just "analyzes" the code and gives the errors and warnings, along with a helpful explanation. -JKop

If I could get that to somehow work, would it work with classes that have polymorphic functions? -JKop

CORRECTION virtual functions -JKop

* JKop wrote:

Anyone know a way of calling a constructor? At first, I was going to post the following code and ask if it was fully portable and all, but then it wouldn''t compile. #include <cstdlib> class AnyClass {}; int main() { AnyClass& blah = *static_cast<AnyClass*> ( std::malloc( sizeof(AnyClass) ) ); blah.AnyClass();

AnyClass& blah = *new (std::malloc(sizeof(AnyClass))) AnyClass; -- Robert Bauck Hamar