Compiler Warning (level 1) C4142


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The latest version of this topic can be found at Compiler Warning (level 1) C4142.

benign redefinition of type

A type is redefined in a manner that has no effect on the generated code.

To fix by checking the following possible causes:

  • A member function of a derived class has a different return type from the corresponding member function of the base class.

  • A type defined with the typedef command is redefined using different syntax.

The following sample generates C4142:

// C4142.c  
// compile with: /W1  
float X2;  
X2 = 2.0 + 1.0;   // C4142  
int main() {  
   float X2;  
   X2 = 2.0 + 1.0;   // OK