Passing structs to functions

[H. S. Teoh via Digitalmars-d-learn]

On Sat, Jul 02, 2016 at 06:47:31PM +0000, phant0m via Digitalmars-d-learn wrote:
> On Saturday, 2 July 2016 at 18:43:51 UTC, ketmar wrote:
> > void boo() (in auto ref MyStruct s) { ... }
> > 
> > this will accept both lvalues and rvalues, and will avoid copying if
> > it can.
> 
> Thank you! Could you please explain what does "auto" in this context
> mean?

It's actually "auto ref", which roughly means "automatically decide
whether it's more efficient to pass by value or pass by ref". The
compiler will decide whether or not to pass by ref.


T

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