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From: rang@cs.wisc.edu (Anton Rang)
Newsgroups: comp.lang.c++,alt.religion.computers
Subject: C++ overloading (was Re: ANSI C prototypes)
Message-ID: <RANG.90Nov12103227@nexus.cs.wisc.edu>
Date: 12 Nov 90 15:32:27 GMT
References: <1005@christopher-robin.cs.bham.ac.uk> <1906@necisa.ho.necisa.oz>
	<RJC.90Nov1145211@brodie.uk.ac.ed.cstr>
	<1990Nov6.002848.3634@clear.com>
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In-Reply-To: rmartin@clear.com's message of 6 Nov 90 00:28:48 GMT

In article <1990Nov6.002848.3634@clear.com> rmartin@clear.com (Bob Martin) writes:
>By the way, this technique of mangling the function names means that
>
>	int x(int y);
>		and
>	double x(double y);
>
>are completely different functions.  You can declare both of them,
>define them separately and call the proper function by making sure
>that the types are correct.

  OK, something I've been curious about for a while (no C++ manual).
Suppose that you have the two functions above visible, and you write
the code:

	int an_integer;
	double a_double;

	a_double = x(an_integer);

  Will this be resolved to calling the 'int x(int y)' function and
promoting its return value to a double, calling the 'double' function
and promoting the integer argument to a double, or will it be
ambiguous?

  (In other words, are return types and parameters given equal weight
in disambiguating calls?)

	Anton
   
+---------------------------+------------------+-------------+
| Anton Rang (grad student) | rang@cs.wisc.edu | UW--Madison |
+---------------------------+------------------+-------------+