Overloading methods in C API

Erik Max Francis max at alcyone.com
Sun Jan 19 02:41:42 CET 2003


Grzegorz Adam Hankiewicz wrote:

> > Nonsense.  The operators + - * / do different things depending on
> > the types of their operands.  That's operator overloading.
> 
> Maybe you are refering to C's usually warningless type coercion in
> mathematical operations? Or you know of a way to add two strings
> and have them concatenated? Please ellaborate.

Well, for one thing, + can do both numeric and pointer arithmetic.  Very
different things.  - also means unary negation (+ also has a unary form
but it is a no-op), and as well as being useful for both pointer
arithmetic _and_ computing the difference between two pointers (a
variant of pointer arithmetic where both operands are compatible
pointers).  * is also used for dereferencing pointers.  And do so on.

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