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Questions - variadic-functions

c++ completely generic event dispatcher

I try again to explain better again what I would achieve. I would like make a thing like this (inspired to Unity's UnityEvent): Public "variables" declared in some classes: GameEvent<>...
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ProtoTyPus

c++

templates

variadic-templates

variadic-functions

Votes: 0

Answers: 1

Latest Answer

What is wrong with the obvious way? void Notify(T... args) { // note: no need to write the type if it's quite long // note: & means the std::function isn't copied for (auto const& ...
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user253751

va_args not accepting signed integer in C

I was designing my kernel using C. While making the kprintf function (a function like printf but works with the kernel) I saw that signed integers (precisely the data type is long), va_args is convert...
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0xdead

c

string

variadic-functions

elf

unsigned-integer

Votes: 0

Answers: 2

Latest Answer

The type of the value you're passing in for your %d specifier doesn't match what va_arg is expecting. You're telling va_arg to expect a long long, but 1234 and -1234 have type int. These types are di...
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dbush

C++ Multiple function parameters with varargs of a specific type

I am relatively new to C++ coming from a Java background so I am not sure if the functionality I am looking for is directly possible. I am attempting to create a C++ function that accepts two differen...
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Hunter Bragg

c++

variadic-functions

Votes: 0

Answers: 2

Latest Answer

To my knowledge, there is no way to directly introduce a template parameter pack where all of the types are required to be the same. However, you can easily create a template that matches different ty...
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Jakob Stark

C++ 17 What is the difference between a fold expression and if constexpr when using variadic template arguments (parameter pack)

I am trying to understand the difference between two approaches for handling parameter packs / variadic template arguments. There are two approaches mentioned in the linked article below. fold expres...
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FreelanceConsultant

c++

c++17

variadic-templates

variadic-functions

if-constexpr

Votes: 0

Answers: 2

Latest Answer

First, this: template <class... Ts> void print_all(std::ostream& os, Ts const&... args) { ((os << args), ...); } is a template that will generate only one function per call li...
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Fureeish

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