In computer science, an operator or function is variadic if it can take a varying number of arguments; that is, if its arity is not fixed.
Questions tagged [variadic]
668 questions
3
votes
1 answer
C++0x passing arguments to variadic template functions
What does it mean to take a variable number of arguments by reference? Does it mean that each of the arguments are passed by reference?
Consider for example the following functions which performs some processing on each its arguments:
void f() //…
HighCommander4
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3
votes
1 answer
Is this syntax legal?
When I uncomment the line in main() below, Visual Studio 2015 won't compile (the code compiles otherwise).
#include
#include
template struct RemoveLastHelper;
template
prestokeys
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3
votes
1 answer
Binary search using variadic templates and lambda functions
Consider this,
struct Person {
std::string name;
Person (const std::string& n) : name(n) {}
std::string getName(int, char) const {return name;} // int, char play no role in this
// simple example, but let's suppose that they are…
prestokeys
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3
votes
1 answer
Passing variadic template argument pack to next function
I have done my own reimplementation of printf() (classic) in my debugging code.
template
void Printf(wchar_t const * message, T value, Args ...args);
void Printf(wchar_t const * message);
void…
Antiusninja
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3
votes
2 answers
Arbitrary dimensional array using Variadic templates
How can I create an Array class in C++11 which can be used like
Array < int, 2, 3, 4> a, b;
Array < char, 3, 4> d;
Array < short, 2> e;
and access it in a way like
a[2][1][2] = 15;
d[1][2] ='a';
I also need to overload operator as
T…
user3803413
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3
votes
2 answers
Inserting any number of types into a pack of template arguments
InsertTypes, Is...>::type is Pack with the types Ts... inserted in positions Is..., respectively.
For example,
InsertTypes, Pack, 2,4,1>::type,
is
Pack
prestokeys
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3
votes
2 answers
Limiting the number of arguments in a variadic function
So I've been working on a function class, and by default, I can do this, and it works:
int main(){
function f("x^2+1");
cout<
blackbeltJR
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3
votes
2 answers
Generic allocator class without variadic templates?
I am trying to write a generic allocator class that does not really release an object's memory when it is free()'d but holds it in a queue and returns a previously allocated object if a new one is requested. Now, what I can't wrap my head around is…
rainer
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3
votes
4 answers
About variadic templates
I'm currently experiencing with the new c++0x variadic templates, and it's quite fun, Although I have a question about the process of member instantiation.
in this example, I'm trying to emulate the strongly typed enum with the possibility of choose…
chedi
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votes
1 answer
Initialization of variadic base classes
The following code doesn't work. Its intent is to pass arguments to variadic base classes. Is this possible, and if so, what's the right way to implement it? (Clang's error message is: an initializer for a delegating constructor must appear alone,…
foxcub
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3
votes
1 answer
dependent types with variadic templates
Can you see anything wrong with this function declaration?
template
std::tuple
foo(const Containers &...args);
When I try to call it, like this:
foo(std::list(),…
slyqualin
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3
votes
1 answer
How do I define a macro with variadic method in objective-C?
The method I am trying to call is;
- (void)addLogWithLevel:(MDCLogLevel)logLevel logContent:(NSString *)logContent, ...
{
va_list args;
va_start(args, logContent);
NSString *message = [[NSString alloc] initWithFormat:logContent
…
MattCheetham
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3
votes
2 answers
Combine two variadic function results
Suppose I have two variadic functions like this:
function a(num)
if num == 1 then
return 1
else
return 1, 2
end
end
function b(num)
if num == 1 then
return 1
else
return 1, 2
end
end
I then want to build another…
Stratus3D
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3
votes
5 answers
how to help programmer write safe and correct printf calls in C?
[Updated organization and content for clarity]
The Real Question
What would be a good way, for C, to help a programmer, while s/he's typing, write safe and correct calls to project-specific printf-like debugging functions?
C macros?
C wrapper…
talkaboutquality
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3
votes
2 answers
C++ : create custom function dispatcher from variadic template
I have some functions that read various types from serialized data, eg:
class DataDeserializer
{
int getInt();
std::string getString();
MyClass getMyClass();
}
I then have various callback functions that take arbitrary parameters,…
gimmeamilk
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