__declspec(noreturn)
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Category
Modifiers (C++), Keyword Extensions, Storage Class Specifiers (C++)
Syntax
__declspec( noreturn ) declarator
This __declspec attribute tells the compiler that a function does not return. As a consequence, the compiler knows that the code following a call to a __declspec(noreturn) function is unreachable.
If the compiler finds a function with a control path that does not return a value, it generates a warning. If the control path cannot be reached due to a function that never returns, you can use __declspec(noreturn) to prevent this warning or error.
Example
Consider the following code. The else clause does not contain a return statement, so the programmer declares fatal as __declspec(noreturn) to avoid an error or warning message.
__declspec(noreturn) extern void fatal ()
{
// Code omitted
}
int foo()
{
if(...)
return 1;
else if(...)
return 0;
else
fatal();
}