Variadic Functions

An introduction to variadic functions, which allow us to pass a variable quantity of arguments

Ryan McCombe
Updated
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Questions & Answers

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Passing Parameter Packs by Value or Reference
When should I pass the parameters in a parameter pack by value, reference, const reference, or forwarding reference?
Recursion vs Fold Expressions
When should I use fold expressions over recursive variadic function calls?
Capturing Lvalues and Rvalues in Variadic Functions
How can I write a variadic function that can accept both lvalue and rvalue arguments?
Zero Argument Variadic Functions
What happens if I call a variadic function with no arguments?
Performance Considerations with Variadic Functions
Are there any performance implications to using variadic functions?
Why use parameter packs instead of just va_args?
I can already write variadic functions in C++ using va_args. Why would I use parameter packs instead?