Compiler Error C2010

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The latest version of this topic can be found at Compiler Error C2010.

character' : unexpected in macro formal parameter list

The character is used incorrectly in the formal parameter list of a macro definition. Remove the character to resolve the error.

The following sample generates C2010:

// C2010.cpp  
// compile with: /c  
#define mymacro(a|) (2*a)   // C2010  
#define mymacro(a) (2*a)   // OK