initialization of built in types in templates

[Gernot Frisch]

// THIS CODE:
template<class Tclass C
{
public:
C()
{
T t;
data[0] = t;
}
T data[5];
};
int main(int, char**)
{
C<doublec;
return 0;
}

// END CODE

yields error: local variable 't' used without being initialized.
What can I do to make it work with built in variables, initialized as
0?

Must I really specialize for every built in type?
--
-Gernot
int main(int argc, char** argv) {printf
("%silto%c%cf%cgl%ssic%ccom%c", "ma", 58, 'g', 64, "ba", 46, 10);}

[Ian Collins]

Gernot Frisch wrote:

// THIS CODE:
template<class Tclass C
{
public:
C()
{
T t;
data[0] = t;
}
T data[5];
};
int main(int, char**)
{
C<doublec;
return 0;
}

// END CODE

yields error: local variable 't' used without being initialized.
What can I do to make it work with built in variables, initialized as
0?

What do you want it to do? Is data[0] = T(); what you want?

--
Ian Collins.

[Jim Langston]

"Gernot Frisch" <[e-mail] in message
news:5d*************@mid.individual.net...

>
// THIS CODE:
template<class Tclass C
{
public:
C()
{
T t;

T t();

data[0] = t;

Although you could just do it here:
data[0] = t();

}
T data[5];
};
int main(int, char**)
{
C<doublec;
return 0;
}

// END CODE

yields error: local variable 't' used without being initialized.
What can I do to make it work with built in variables, initialized as 0?

Must I really specialize for every built in type?

[Kai-Uwe Bux]

Gernot Frisch wrote:

>
// THIS CODE:
template<class Tclass C
{
public:
C()
{
T t;
data[0] = t;

What about ditching the variable t altogether:

data[0] = T();

}
T data[5];
};
int main(int, char**)
{
C<doublec;
return 0;
}

// END CODE

yields error: local variable 't' used without being initialized.
What can I do to make it work with built in variables, initialized as
0?

Must I really specialize for every built in type?

No.
Best

Kai-Uwe Bux

[Jim Langston]

"Jim Langston" <ta*******@rocketmail.comwrote in message
news:4d*************@newsfe06.lga...

>
"Gernot Frisch" <[e-mail] in message
news:5d*************@mid.individual.net...

>>
// THIS CODE:
template<class Tclass C
{
public:
C()
{
T t;

T t();

> data[0] = t;

Although you could just do it here:
data[0] = t();

er,
data[0] = T();
is what I meant.

>

>}
T data[5];
};
int main(int, char**)
{
C<doublec;
return 0;
}

// END CODE

yields error: local variable 't' used without being initialized.
What can I do to make it work with built in variables, initialized as 0?

Must I really specialize for every built in type?

[Gernot Frisch]

>What can I do to make it work with built in variables, initialized
as
0?

What do you want it to do? Is data[0] = T(); what you want?

Doh! thank you

[Gernot Frisch]

T t();

didn't work for <unsigned char>. It's trying to assign a function
then.
Ian's solution did it, though.
Thx for quick response.

[dasjotre]

On 21 Jun, 09:07, "Gernot Frisch" <[e-mail]:

T t();

didn't work for <unsigned char>. It's trying to assign a function
then.

not just for unsigned char.

T t();

declares function T (*)(void).

you either do
T t = T();
data[0] = t;

or
data[0] = T();

Ian's solution did it, though.
Thx for quick response.

check boost::value_intialized if you have to do
the same for non POD types.

regards

DS

[Marcus Kwok]

Jim Langston <ta*******@rocketmail.comwrote:

"Gernot Frisch" <[e-mail] in message
news:5d*************@mid.individual.net...

>>
// THIS CODE:
template<class Tclass C
{
public:
C()
{
T t;

T t();

This will declare a function called 't' that takes no parameters and
returns a T.

> data[0] = t;

Although you could just do it here:
data[0] = t();

data[0] = T(); as others have mentioned (including yourself in a later
post).

--
Marcus Kwok
Replace 'invalid' with 'net' to reply