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Corel Draw Portable Windows 8 sibichad




Q: Is there a more direct way to make the compiler throw an exception? I know there is the way to declare an exception and throw it in the constructor: class InvalidArgumentException : public Exception { public: InvalidArgumentException(int arg_arg); }; class X X(); ~X(); void doSomething(int arg_arg); void X::doSomething(int arg_arg) if (arg_arg > 10) throw InvalidArgumentException(10); } but I thought that the standard library provides a more direct way to make the compiler raise an exception. For example, if I write this: #include int main() int n; std::cin >> n; return 0; I am expecting the compiler to throw an exception: Error: variable has incomplete type'std::istream' But I have never seen it. Is there some attribute I am missing that enables this behavior? A: Yes. It's called an ill-formed program. If the compiler doesn't diagnose it, the program is ill-formed. Here is a demo in GCC: $ g++ -c invalid_arg.cpp invalid_arg.cpp: In function 'int main()': invalid_arg.cpp:7:30: error:'std::istream' is not a type std::cin >> n; The error is the only thing that causes the program to fail to compile. Here is a sample run in g++ 4.4.6 (using -std=c++0x, if you don't have g++ 4.4.6, change the option string to -std=c++11): $ g++ -std=c++0x -c invalid_arg.cpp $ $ g++ -std=c++11 -c invalid_arg.cpp $./a.out 1 (if you want to make sure your compiler will





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Corel Draw Portable Windows 8 sibichad

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