59 lines
2.1 KiB
C++
59 lines
2.1 KiB
C++
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// fig12_05.cpp
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// Demonstrating a function try block.
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#include <fmt/format.h>
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#include <iostream>
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#include <limits>
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#include <stdexcept>
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// class Integer purposely throws an exception from its constructor
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class Integer {
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public:
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explicit Integer(int i) : value{i} {
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std::cout << fmt::format("Integer constructor: {}\n", value)
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<< "Purposely throwing exception from Integer constructor\n";
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throw std::runtime_error("Integer constructor failed");
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}
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private:
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int value{};
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};
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class ResourceManager {
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public:
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ResourceManager(int i) try : myInteger(i) {
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std::cout << "ResourceManager constructor called\n";
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}
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catch (const std::runtime_error& ex) {
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std::cout << fmt::format(
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"Exception while constructing ResourceManager: ", ex.what())
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<< "\nAutomatically rethrowing the exception\n";
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}
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private:
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Integer myInteger;
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};
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int main() {
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try {
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const ResourceManager resource{7};
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}
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catch (const std::runtime_error& ex) {
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std::cout << fmt::format("Rethrown exception caught in main: {}\n",
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ex.what());
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}
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}
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/**************************************************************************
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* (C) Copyright 1992-2022 by Deitel & Associates, Inc. and *
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* Pearson Education, Inc. All Rights Reserved. *
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* *
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* DISCLAIMER: The authors and publisher of this book have used their *
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* best efforts in preparing the book. These efforts include the *
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* development, research, and testing of the theories and programs *
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* to determine their effectiveness. The authors and publisher make *
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* no warranty of any kind, expressed or implied, with regard to these *
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* programs or to the documentation contained in these books. The authors *
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* and publisher shall not be liable in any event for incidental or *
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* consequential damages in connection with, or arising out of, the *
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* furnishing, performance, or use of these programs. *
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**************************************************************************/
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