Exceptions: Difference between revisions
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(→Defining exceptions: std::exception as base class, and a note) |
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===Defining exceptions=== |
===Defining exceptions=== |
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<cpp> |
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struct MyException |
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{ |
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{ |
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// data with info about exception |
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}; |
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</cpp> |
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There's also a class <code>std::exception</code> which you can, but are not required to derive your exception class from. The advantage of doing so is that you can catch unknown exceptions and still get some meaningful information out. There are also more specific classes like <code>std::runtime_error</code> which derive from <code>std::exception</code>. |
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<cpp> |
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#include <exception> |
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struct MyException: std::exception |
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{ |
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char const* what() const throw() { return "description"; } |
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} |
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</cpp> |
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Note that in principle you can throw any copyable type as exception, including built-in types. |
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===Throw exceptions=== |
===Throw exceptions=== |
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