Monday, June 27, 2005

An interesting consequence of decay related rules of pointers
and references is that seemingly correct C++ code fails to

We have a max() template with pretty obvious implementation
for basic types.

template < typename T >
T & max (T &a,T &b);



Gives an error, because
type of "APPLE" is const char [6]
type of "PEAR" is const char [5]

T can't be "const char [6]" AND "const char [5]"
at the same time!! No array-to-pointer decay occurs here.

Above thing will work for following declaration of max

template < typename T >
T max (T a, T b);

Here T is char *!!


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