class as template parm

[Chris Forone]

hello group,

i have a class as template parm for another class. in ctor of the
parameterized class i use a local instance of class from parm. ctor of
param-class compiles fine, but i cant call members.

error: request for member `Decode' in `image [with T = Targa]', which is
of non-class type `Targa ()(std::istreambuf_iterator<char,
std::char_traits<char)

thanks & hand, chris

ps/ot: are you interested in uefa european-championship (em)?

[Victor Bazarov]

Chris Forone wrote:

i have a class as template parm for another class. in ctor of the
parameterized class i use a local instance of class from parm. ctor of
param-class compiles fine, but i cant call members.

Lemme see if I can imagine what you're doing...

error: request for member `Decode' in `image [with T = Targa]', which is
of non-class type `Targa ()(std::istreambuf_iterator<char,
std::char_traits<char)

template<class Tclass image {
public:
image() {
T t;
t.Decode();
}
};

class Targa {
public:
void Decode() {}
};

int main() {
image<Targait;
}

Well, this should work, more or less. But how do you get the error
message with such content. I can only think that you must have
forgotten to use parentheses or used too many of them...

image() {
T t(); // t is a *function*
t.Decode(); // cannot use 't' here!!!
}

So, if you are trying to declare 't' here, drop the parentheses.

>
thanks & hand, chris

ps/ot: are you interested in uefa european-championship (em)?

Nope.

V
--
Please remove capital 'A's when replying by e-mail
I do not respond to top-posted replies, please don't ask

[Chris Forone]

template<class Tclass image {

public:
image() {
T t;
t.Decode();
}
};

class Targa {
public:
void Decode() {}
};

int main() {
image<Targait;
}

Exactly, but with a parm in ctor for class Targa. Possibly thats the
error because i need the parentheses (T t(const std::string& name);)...

>
Well, this should work, more or less. But how do you get the error
message with such content. I can only think that you must have
forgotten to use parentheses or used too many of them...

image() {
T t(); // t is a *function*
t.Decode(); // cannot use 't' here!!!
}

So, if you are trying to declare 't' here, drop the parentheses.

i cant because of parm...

thanks a lot...

[Victor Bazarov]

Chris Forone wrote:

>template<class Tclass image {
public:
image() {
T t;
t.Decode();
}
};

class Targa {
public:
void Decode() {}
};

int main() {
image<Targait;
}

Exactly, but with a parm in ctor for class Targa. Possibly thats the
error because i need the parentheses (T t(const std::string& name);)...

>>
Well, this should work, more or less. But how do you get the error
message with such content. I can only think that you must have
forgotten to use parentheses or used too many of them...

image() {
T t(); // t is a *function*
t.Decode(); // cannot use 't' here!!!
}

So, if you are trying to declare 't' here, drop the parentheses.

i cant because of parm...

FAQ 5.8.

V
--
Please remove capital 'A's when replying by e-mail
I do not respond to top-posted replies, please don't ask

[Chris Forone]

Victor Bazarov schrieb:

Chris Forone wrote:

>>template<class Tclass image {
public:
image() {
T t;
t.Decode();
}
};

class Targa {
public:
void Decode() {}
};

int main() {
image<Targait;
}

Exactly, but with a parm in ctor for class Targa. Possibly thats the
error because i need the parentheses (T t(const std::string& name);)...

>>>
Well, this should work, more or less. But how do you get the error
message with such content. I can only think that you must have
forgotten to use parentheses or used too many of them...

image() {
T t(); // t is a *function*
t.Decode(); // cannot use 't' here!!!
}

So, if you are trying to declare 't' here, drop the parentheses.

i cant because of parm...

FAQ 5.8.

V

Sorry, but its to complicated to do all these things. But i think its
what you suggested. Thanks.