uncaught_exception
Returns true only if a thrown exception is being currently processed.
bool uncaught_exception( );
Return Value
Returns true after completing evaluation of a throw expression and before completing initialization of the exception declaration in the matching handler or calling unexpected as a result of the throw expression. In particular, uncaught_exception will return true when called from a destructor that is being invoked during an exception unwind. On devices, uncaught_exception is only supported on Windows CE 5.00 and higher versions, including Windows Mobile 2005 platforms.
Example
// exception_uncaught_exception.cpp
// compile with: /EHsc
#include <exception>
#include <iostream>
#include <string>
class Test
{
public:
Test( std::string msg ) : m_msg( msg )
{
std::cout << "In Test::Test(\"" << m_msg << "\")" << std::endl;
}
~Test( )
{
std::cout << "In Test::~Test(\"" << m_msg << "\")" << std::endl
<< " std::uncaught_exception( ) = "
<< std::uncaught_exception( )
<< std::endl;
}
private:
std::string m_msg;
};
// uncaught_exception will be true in the destructor
// for the object created inside the try block because
// the destructor is being called as part of the unwind.
int main( void )
{
Test t1( "outside try block" );
try
{
Test t2( "inside try block" );
throw 1;
}
catch (...) {
}
}
In Test::Test("outside try block") In Test::Test("inside try block") In Test::~Test("inside try block") std::uncaught_exception( ) = 1 In Test::~Test("outside try block") std::uncaught_exception( ) = 0
Requirements
Header: <exception>
Namespace: std