{cpp} provides safer ways of achieving what is often done using the pre-processor, by way of inline functions and constant declarations.


== Noncompliant Code Example

----
#ifndef HDR // Compliant 
#define HDR // Compliant
#define X(Y) (Y) // Noncompliant
#define PI 3.141592 // Noncompliant
#endif
----


== Compliant Solution

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template<typename T> inline T function(T t) { return t; } // Compliant
double const PI = 3.141592; // Compliant
----


== See

* MISRA {cpp}:2008, 16-2-1