compiler-warning-level-3-c4290.md

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Learn more about: Compiler Warning (level 3) C4290	Compiler Warning (level 3) C4290	11/04/2016	C4290	C4290	d1c6d85b-28e0-4a1f-9d48-23593337a6fb

Compiler Warning (level 3) C4290

C++ exception specification ignored except to indicate a function is not __declspec(nothrow)

A function is declared using exception specification, which Visual C++ accepts but does not implement. Code with exception specifications that are ignored during compilation may need to be recompiled and linked to be reused in future versions supporting exception specifications.

For more information, see Exception Specifications (throw) .

You can avoid this warning by using the warning pragma:

#pragma warning( disable : 4290 )

The following code sample generates C4290:

// C4290.cpp
// compile with: /EHs /W3 /c
void f1(void) throw(int) {}   // C4290

// OK
void f2(void) throw() {}
void f3(void) throw(...) {}