Typename Parameter as a Return Type

Templates are not just for defining the types of parameters. A powerful feature of templates is that the return type of a function can also depend on the template parameter. This gives you the flexibility to create generic functions with return types that adjust based on the template type provided.

main


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#include <iostream>

template<typename T> 
T MyFirstTemplateReturn() 
{
	// Returning a default-initialized value of type T
	return T{};
}

int main() 
{
    // Call the template with the void type
    std::cout << typeid(MyFirstTemplateReturn<void>()).name() << std::endl;
}

In the example above, the function's return type is defined by the template parameter T. When we specify void as the type, the compiler interprets it accordingly.

Oppgave

Swipe to start coding

Create a simple template that returns the passed value

Write a simple template function called GetValue.
Use the template's typename parameter as the return type.
Add a parameter to the template function with the same type as the return type.
Return the function's parameter.

Løsning

solution

Bytt til skrivebordet for virkelighetspraksisFortsett der du er med et av alternativene nedenfor

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Seksjon 2. Kapittel 1

Typename Parameter as a Return Type

main


              1234567891011121314
            
#include <iostream>

template<typename T> 
T MyFirstTemplateReturn() 
{
	// Returning a default-initialized value of type T
	return T{};
}

int main() 
{
    // Call the template with the void type
    std::cout << typeid(MyFirstTemplateReturn<void>()).name() << std::endl;
}

In the example above, the function's return type is defined by the template parameter T. When we specify void as the type, the compiler interprets it accordingly.

Oppgave

Swipe to start coding

Create a simple template that returns the passed value

Write a simple template function called GetValue.
Use the template's typename parameter as the return type.
Add a parameter to the template function with the same type as the return type.
Return the function's parameter.

Løsning

solution

Bytt til skrivebordet for virkelighetspraksisFortsett der du er med et av alternativene nedenfor

Alt var klart?

Takk for tilbakemeldingene dine!

Seksjon 2. Kapittel 1

Bytt til skrivebordet for virkelighetspraksisFortsett der du er med et av alternativene nedenfor