Date: Sat, 27 Feb 1999 18:05:14 -0500
Message-Id: <199902272305.SAA02761@envy.delorie.com>
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From: DJ Delorie <dj AT delorie DOT com>
To: djgpp AT delorie DOT com
In-reply-to: <3.0.6.32.19990227021519.0088c6f0@pop.globalserve.net> (message
	from Paul Derbyshire on Sat, 27 Feb 1999 02:15:19 -0500)
Subject: Re: sin, cos ??
References: <36d2f284 DOT 0 AT news DOT sbbs DOT se>
 <199902231842 DOT NAA15055 AT envy DOT delorie DOT com>
 <7b26kt$g5n AT chronicle DOT concentric DOT net> <3 DOT 0 DOT 6 DOT 32 DOT 19990227021519 DOT 0088c6f0 AT pop DOT globalserve DOT net>
Reply-To: djgpp AT delorie DOT com


Too bad this example won't compile if the user is using C.  Replacing
those templates with a simple "double" would have been just as useful,
yet would have worked for both C and C++.

> const long double pi = 3.141592653589793
> 
> template <class F> // 'F' as in 'Floating point'
> inline F deg2rad (F deg) { return deg*pi/180.0; }
> 
> template <class F>
> inline F rad2deg (F rad) { return 180.0*rad/pi; }
> 
> There. Nice and type-safe and free of bogons with arguments that have side
> effects. More readable too, just as inlined and quick, and moreover, if you
> have egcs you can stick these in your own namespace and keep them from
> cluttering the global one.