Re: templated func : what's wrong

From:

"Jim Langston" <tazmaster@rocketmail.com>

Newsgroups:

comp.lang.c++

Date:

Wed, 8 Aug 2007 02:27:47 -0700

Message-ID:

<z1gui.73$as3.14@newsfe03.lga>

"mosfet" <john.doe@anonymous.org> wrote in message
news:46b9756a$0$9301$426a74cc@news.free.fr...

HI,

when trying to compile an embedded version of STL called ustl on win32
platform I get the following error :

/// Returns the minimum of \p a and \p b
template <typename T1, typename T2>
inline const T1 min (const T1& a, const T2& b)
{
return (a < b ? a : b);
}

1>c:\program files\microsoft visual studio
8\vc\include\ustl\uutility.h(69) : error C2027: use of undefined type 'T1'
1>c:\program files\microsoft visual studio
8\vc\include\ustl\uutility.h(69) : error C2226: syntax error : unexpected
type 'T1'
1>c:\program files\microsoft visual studio
8\vc\include\ustl\uutility.h(69) : error C2988: unrecognizable template
declaration/definition
1>c:\program files\microsoft visual studio
8\vc\include\ustl\uutility.h(69) : error C2059: syntax error :
'<cv-qualifer>'
1>c:\program files\microsoft visual studio
8\vc\include\ustl\uutility.h(69) : error C2059: syntax error : ')'

I think it comes from the fact template functions like this are not
standard C++.
Could someone confirm ?

How can I change that ?

I get a warning when I compile your code, I thought it wouldn't even
compile. When I remove the first "const" the error goes away. What is that
const suppoed to mean? Try this isntead:

template <typename T1, typename T2>
inline T1 min (const T1& a, const T2& b)
{
return (a < b ? a : b);
}

Note: changed from inline const T1 to inline T1

That const there doesn't make much sense to the compiler, or me.