Template speccialization question

[Alfonso Morra]

I have a function template declared as ff:

template <class T1, class T2> size_t find( const T1& col, const T2&
val, const ColFindEnum& dir ) ;


I wanted to specialize it for string,long as ff:

template<> //string, long specialization
size_t find( const std::string& col, long& val, const ColFindEnum& dir )


However, I get a compiler error:
error C2912: explicit specialization; 'size_t A::find(const std::string
&,long &,const Table::ColFindE num &)' is not a specialization of a
function template

Is it not possible to have a function template that has both template
arguments and arguments with "known types"?

[Rob Williscroft]

Re: Template speccialization question

Alfonso Morra wrote in news:dca6s8$i19 $1@nwrdmz02.dmz .ncs.ea.ibs-
infra.bt.com in comp.lang.c++:
[color=blue]
> I have a function template declared as ff:
>
> template <class T1, class T2> size_t find( const T1& col, const T2&
> val, const ColFindEnum& dir ) ;
>
>
> I wanted to specialize it for string,long as ff:
>
> template<> //string, long specialization
> size_t find( const std::string& col, long& val, const ColFindEnum& dir
> )
>[/color]

Try making it ..., long const &val, ...
............... ..........^^^^^

long & can't be used to deduce a valid T2 as its declared T2 const &.
[color=blue]
>
> However, I get a compiler error:
> error C2912: explicit specialization; 'size_t A::find(const std::string
> &,long &,const Table::ColFindE num &)' is not a specialization of a
> function template
>
> Is it not possible to have a function template that has both template
> arguments and arguments with "known types"?[/color]

Partial specializations are illegal, explicit specializations , like you
tried above, are legal.

HTH.

Rob.
--

http://www.victim-prime.dsl.pipex.com/