On Monday 27 February 2006 04:44, Jon S. Berndt wrote:
> > Stupid me. I worded the problem incorrectly. Obviously, the
> > problem is with
> > a compile of the FlightGear test program, with the definition or use of
> > "min".
>
> Here's the offensive code in /usr/local/include/simgear/math/SGMisc.hxx
>
> === start ===
>
> #ifndef SGMisc_H
> #define SGMisc_H
>
> #include <cmath>
>
> template<typename T>
> class SGMisc {
> public:
> static T pi() { return T(3.1415926535897932384626433832795029L); }
> static T min(const T& a, const T& b)
>
> === end ===
>
> The last line, above, is the culprit. As before, the errors are:
>
> SGMisc.hxx:28: error: expected unqualified-id before "const"
> SGMisc.hxx:28: error: expected `)' before "const"
> SGMisc.hxx:28: error: expected `)' before "const"
>
> The rest of the errors (lots of them), likewise involve "min".
>
> Jon
>
> P.S. What is the test-up application, anyhow? Can we avoid compiling that?
> Or, is it needed?
Yes it is needed and used.
It is a handy and typesafe way to program a min or max function.
You know exactly what type the input arguments are and which the output
arguments are.
What you can do when you want a float max is
SFMisc<float>::max(b, a)
You don't get ambiguities and you dont get whatever min/max is defined in the
global namespace you dont know about which types are used when it is really
defined.
What brakes, but that brakes anyway if you do includes in the wrong order, is
that a prevously defined min/max macro will disturb the
declaration/implementation of the SGMisc min/max as it would disturb that for
every other min/max declaration/implementation like the std::min/std::max
functions for example too.
I bet that you defined such a macro and past that include SGMath.h
Greetings
Mathias
--
Mathias Fröhlich, email: [EMAIL PROTECTED]
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