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transform into templates
Hi,
How can I transform the following functions into templated version :
class foo
{
public:
Ret_t GetProfileCount( UShort_t& a_nCount )
{
return Get( SM_PRIV_CMD_GET_PROFILE_COUNT,
0,
0,
( ULong_t ) sizeof( UShort_t ),
( MemPtr_t ) &a_nCount );
}
};
I tried this :
class foo
{
public:
template <class Type>
Ret_t GetProp1(Short_t a_cmdId, Type& a_argType)
{
return Get( a_cmdId,
0,
0,
( a_argType ) sizeof( a_argType ),
( MemPtr_t ) &a_argType );
}
typedef GetProp1<UShort_t> GetProfileCount;
};
but of course it doesn't work like that.
Some help is needed.
Mosfet wrote: > Hi, > How can I transform the following functions into templated version :
> class foo
> {
> public:
> Ret_t GetProfileCount( UShort_t& a_nCount )
> {
> return Get( SM_PRIV_CMD_GET_PROFILE_COUNT,
> 0,
> 0,
> ( ULong_t ) sizeof( UShort_t ),
> ( MemPtr_t ) &a_nCount );
> }
> };
> I tried this :
> class foo
> {
> public:
> template <class Type>
> Ret_t GetProp1(Short_t a_cmdId, Type& a_argType)
> {
> return Get( a_cmdId,
> 0,
> 0,
> ( a_argType ) sizeof( a_argType ),
(ULong_t) sizeof( a_argType ),
...
> ( MemPtr_t ) &a_argType ); > } > typedef GetProp1<UShort_t> GetProfileCount;
> };
> but of course it doesn't work like that.
V
--
Please remove capital 'A's when replying by e-mail
I do not respond to top-posted replies, please don't ask
Victor Bazarov a crit :
> Mosfet wrote: >> Hi, >> How can I transform the following functions into templated version :
>> class foo
>> {
>> public:
>> Ret_t GetProfileCount( UShort_t& a_nCount )
>> {
>> return Get( SM_PRIV_CMD_GET_PROFILE_COUNT,
>> 0,
>> 0,
>> ( ULong_t ) sizeof( UShort_t ),
>> ( MemPtr_t ) &a_nCount );
>> }
>> };
>> I tried this :
>> class foo
>> {
>> public:
>> template <class Type>
>> Ret_t GetProp1(Short_t a_cmdId, Type& a_argType)
>> {
>> return Get( a_cmdId,
>> 0,
>> 0,
>> ( a_argType ) sizeof( a_argType ),
> Should probably be
> (ULong_t) sizeof( a_argType ),
> ...
>> ( MemPtr_t ) &a_argType );
>> }
>> typedef GetProp1<UShort_t> GetProfileCount;
>> };
>> but of course it doesn't work like that.
> Not sure what you mean by "doesn't work".
> V
error C4430: missing type specifier - int assumed. Note: C++ does not
support default-int
error C2365: 'CSyncClientSession::GetProp1' : redefinition; previous
definition was 'member function'
error C4430: missing type specifier - int assumed. Note: C++ does not
support default-int
Mosfet wrote: > Victor Bazarov a crit : >> Mosfet wrote: >>> Hi, >>> How can I transform the following functions into templated version :
>>> class foo
>>> {
>>> public:
>>> Ret_t GetProfileCount( UShort_t& a_nCount )
>>> {
>>> return Get( SM_PRIV_CMD_GET_PROFILE_COUNT,
>>> 0,
>>> 0,
>>> ( ULong_t ) sizeof( UShort_t ),
>>> ( MemPtr_t ) &a_nCount );
>>> }
>>> };
>>> I tried this :
>>> class foo
>>> {
>>> public:
>>> template <class Type>
>>> Ret_t GetProp1(Short_t a_cmdId, Type& a_argType)
>>> {
>>> return Get( a_cmdId,
>>> 0,
>>> 0,
>>> ( a_argType ) sizeof( a_argType ),
>> Should probably be
>> (ULong_t) sizeof( a_argType ),
>> ...
>>> ( MemPtr_t ) &a_argType );
>>> }
>>> typedef GetProp1<UShort_t> GetProfileCount;
>>> };
>>> but of course it doesn't work like that.
>> Not sure what you mean by "doesn't work".
>> V
> error C2146: syntax error : missing ';' before identifier
> 'GetProfileCount' error C4430: missing type specifier - int assumed.
> Note: C++ does not support default-int
> error C2365: 'CSyncClientSession::GetProp1' : redefinition; previous
> definition was 'member function'
> error C4430: missing type specifier - int assumed. Note: C++ does not
> support default-int
V
--
Please remove capital 'A's when replying by e-mail
I do not respond to top-posted replies, please don't ask
Victor Bazarov a crit :
> Mosfet wrote: >> Victor Bazarov a crit : >>> Mosfet wrote: >>>> Hi, >>>> How can I transform the following functions into templated version :
>>>> class foo
>>>> {
>>>> public:
>>>> Ret_t GetProfileCount( UShort_t& a_nCount )
>>>> {
>>>> return Get( SM_PRIV_CMD_GET_PROFILE_COUNT,
>>>> 0,
>>>> 0,
>>>> ( ULong_t ) sizeof( UShort_t ),
>>>> ( MemPtr_t ) &a_nCount );
>>>> }
>>>> };
>>>> I tried this :
>>>> class foo
>>>> {
>>>> public:
>>>> template <class Type>
>>>> Ret_t GetProp1(Short_t a_cmdId, Type& a_argType)
>>>> {
>>>> return Get( a_cmdId,
>>>> 0,
>>>> 0,
>>>> ( a_argType ) sizeof( a_argType ),
>>> Should probably be
>>> (ULong_t) sizeof( a_argType ),
>>> ...
>>>> ( MemPtr_t ) &a_argType );
>>>> }
>>>> typedef GetProp1<UShort_t> GetProfileCount;
>>>> };
>>>> but of course it doesn't work like that.
>>> Not sure what you mean by "doesn't work".
>>> V
>> error C2146: syntax error : missing ';' before identifier
>> 'GetProfileCount' error C4430: missing type specifier - int assumed.
>> Note: C++ does not support default-int
>> error C2365: 'foo::GetProp1' : redefinition; previous
>> definition was 'member function'
>> error C4430: missing type specifier - int assumed. Note: C++ does not
>> support default-int
> FAQ 5.8.
> V
Mosfet wrote: > Victor Bazarov a crit : >> Mosfet wrote: >>> Victor Bazarov a crit : >>>> Mosfet wrote: >>>>> Hi, >>>>> How can I transform the following functions into templated
>>>>> version : class foo
>>>>> {
>>>>> public:
>>>>> Ret_t GetProfileCount( UShort_t& a_nCount )
>>>>> {
>>>>> return Get( SM_PRIV_CMD_GET_PROFILE_COUNT,
>>>>> 0,
>>>>> 0,
>>>>> ( ULong_t ) sizeof( UShort_t ),
>>>>> ( MemPtr_t ) &a_nCount );
>>>>> }
>>>>> };
>>>>> I tried this :
>>>>> class foo
>>>>> {
>>>>> public:
>>>>> template <class Type>
>>>>> Ret_t GetProp1(Short_t a_cmdId, Type& a_argType)
>>>>> {
>>>>> return Get( a_cmdId,
>>>>> 0,
>>>>> 0,
>>>>> ( a_argType ) sizeof( a_argType ),
>>>> Should probably be
>>>> (ULong_t) sizeof( a_argType ),
>>>> ...
>>>>> ( MemPtr_t ) &a_argType );
>>>>> }
>>>>> typedef GetProp1<UShort_t> GetProfileCount;
>>>>> };
>>>>> but of course it doesn't work like that.
>>>> Not sure what you mean by "doesn't work".
>>>> V
>>> error C2146: syntax error : missing ';' before identifier
>>> 'GetProfileCount' error C4430: missing type specifier - int assumed.
>>> Note: C++ does not support default-int
>>> error C2365: 'foo::GetProp1' : redefinition; previous
>>> definition was 'member function'
>>> error C4430: missing type specifier - int assumed. Note: C++ does
>>> not support default-int
>> FAQ 5.8.
>> V
> I am not sure it's MS specific. I think I made a mistake ...
about your 'ULong_t', 'Ret_t' and so on. Do you have them defined? Do
not make me guess. If you want help, provide enough information. And
do read the FAQ.
V
Victor Bazarov a crit :
> Mosfet wrote: >> Victor Bazarov a crit : >>> Mosfet wrote: >>>> Victor Bazarov a crit : >>>>> Mosfet wrote: >>>>>> Hi, >>>>>> How can I transform the following functions into templated
>>>>>> version : class foo
>>>>>> {
>>>>>> public:
>>>>>> Ret_t GetProfileCount( UShort_t& a_nCount )
>>>>>> {
>>>>>> return Get( SM_PRIV_CMD_GET_PROFILE_COUNT,
>>>>>> 0,
>>>>>> 0,
>>>>>> ( ULong_t ) sizeof( UShort_t ),
>>>>>> ( MemPtr_t ) &a_nCount );
>>>>>> }
>>>>>> };
>>>>>> I tried this :
>>>>>> class foo
>>>>>> {
>>>>>> public:
>>>>>> template <class Type>
>>>>>> Ret_t GetProp1(Short_t a_cmdId, Type& a_argType)
>>>>>> {
>>>>>> return Get( a_cmdId,
>>>>>> 0,
>>>>>> 0,
>>>>>> ( a_argType ) sizeof( a_argType ),
>>>>> Should probably be
>>>>> (ULong_t) sizeof( a_argType ),
>>>>> ...
>>>>>> ( MemPtr_t ) &a_argType );
>>>>>> }
>>>>>> typedef GetProp1<UShort_t> GetProfileCount;
>>>>>> };
>>>>>> but of course it doesn't work like that.
>>>>> Not sure what you mean by "doesn't work".
>>>>> V
>>>> error C2146: syntax error : missing ';' before identifier
>>>> 'GetProfileCount' error C4430: missing type specifier - int assumed.
>>>> Note: C++ does not support default-int
>>>> error C2365: 'foo::GetProp1' : redefinition; previous
>>>> definition was 'member function'
>>>> error C4430: missing type specifier - int assumed. Note: C++ does
>>>> not support default-int
>>> FAQ 5.8.
>>> V
>> I am not sure it's MS specific. I think I made a mistake ...
> Who said anything about MS specificity? I don't want to assume anything
> about your 'ULong_t', 'Ret_t' and so on. Do you have them defined? Do
> not make me guess. If you want help, provide enough information. And
> do read the FAQ.
> V
Yes it's define like that
typedef short Short_t; // short integer, 16 Bytes
typedef long Long_t; // long integer, 32 Bytes
typedef char Char_t;
typedef unsigned short UShort_t; // unsigned short integer, 16 Bytes
typedef unsigned long ULong_t; // unsigned long integer, 32 Bytes
typedef char* String_t; // String pointer,
typedef unsigned char Byte_t; // a single byte
typedef Byte_t Boolean_t; // a boolean
typedef Short_t Ret_t; // Return Type of API Commands
typedef Long_t Length_t; // System dependent string length
typedef Short_t MemHandle_t; // Memory object Handle
typedef unsigned char* MemPtr_t; // Memory object Pointer
typedef void* VoidPtr_t; // Void Pointer
typedef Long_t MemSize_t; // System dependent memory object size
typedef unsigned char MemByte_t; // Memory element
typedef unsigned int Flag_t; // A generic flag type. This type is
used to
// declare variables in structures
wherever
// flags are used.
class foo
{
public:
foo();
virtual ~foo();
template <class Type>
Ret_t GetProp1(Short_t a_cmdId, Type& a_argType)
{
return Get( a_cmdId,
0,
0,
( a_argType ) sizeof( a_argType ),
( MemPtr_t ) &a_argType );
}
typedef GetProp1<SM_PRIV_CMD_GET_PROFILE_COUNT, UShort_t> GetProfileCount;
};
On May 15, 6:41 am, Mosfet <anonym@free.fr> wrote:
> Hi, > How can I transform the following functions into templated version :
> class foo
> {
> public:
> Ret_t GetProfileCount( UShort_t& a_nCount )
> return Get( SM_PRIV_CMD_GET_PROFILE_COUNT, > 0, > 0, > ( ULong_t ) sizeof( UShort_t ), > ( MemPtr_t ) &a_nCount ); > }
> };
> I tried this :
> class foo
> {
> public:
> template <class Type>
> Ret_t GetProp1(Short_t a_cmdId, Type& a_argType)
> {
> return Get( a_cmdId,
> 0,
> 0,
> ( a_argType ) sizeof( a_argType ),
> ( MemPtr_t ) &a_argType );
> }
> typedef GetProp1<UShort_t> GetProfileCount;
> };
> but of course it doesn't work like that.
> Some help is needed.
types) and the argument ?
Then, you need to couple these things somehow:
i.e.
struct ProfileCount
{
enum { cmd_id = SM_PRIV_CMD_GET_PROFILE_COUNT };
typedef ULong_t & param_t;
};
Now define a Get method
template <typename Traits>
Ret_t Get( typename Traits::param_t param )
{
return Get(
Traits::cmd_id, 0, 0, sizeof( param ),
reinterpret_cast<MemPtr_t>( & param )
);
}
Now you can write
if ( Get<ProfileCount>( val ) == OK )
So, now you need to ask yourself, did it make a difference to you -
probably not much.
val = Get<ProfileCount>();
That would be a bit better - maybe you can define another Get like
(and keep them both)
... first add a few things here
struct ProfileCount
{
enum { cmd_id = SM_PRIV_CMD_GET_PROFILE_COUNT };
typedef ULong_t result_t;
typedef result_t & param_t;
};
template <typename Traits>
typename Traits::result_t Get()
{
typename Traits::result_t val;
Ret_t ret = Get(
Traits::cmd_id, 0, 0, sizeof( val ),
reinterpret_cast<MemPtr_t>( & val )
);
if ( ret != OK )
{
abort(); // if it is a programming error
throw Exception<ProfileCount>();
}
return val;
}
OK - now you have two ways to call these GET methods and one lump of
code.
Without knowing more about what it is exactly that you need to do, I
have no idea how to help.
As a guess, you can add some methods in your traits class depending on
the type you're dealing with.
Example: You wanted to return a vector and the Get called required an
array, then you need to provide a method of converting a reference to
a vector to a reference to an array which would work also for non
array types.
Do you need to do somthing like:
std::list<std::string> val = Get<Names>();
If so, you need to add some more stuff to your traits class so that it
works for all types.
Mosfet wrote: > [..some senseless type renaming snipped..] > class foo > { > public: > foo();
> virtual ~foo();
> template <class Type>
> Ret_t GetProp1(Short_t a_cmdId, Type& a_argType)
> {
> return Get( a_cmdId,
> 0,
> 0,
> ( a_argType ) sizeof( a_argType ),
> ( MemPtr_t ) &a_argType );
> }
> typedef GetProp1<SM_PRIV_CMD_GET_PROFILE_COUNT, UShort_t>
> GetProfileCount; };
'GetProp1' is a function template. I don't think you can use that
template-id to form a typedef-id. If you're trying to do what I
think you're trying to do, you'd be much better off with a simple
function that calls the template instance:
Ret_t GetProfileCount(UShort_t & arg) {
return GetProp1(SM_PRIV_CMD..., arg);
}
V
--
Please remove capital 'A's when replying by e-mail
I do not respond to top-posted replies, please don't ask
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