collection

kas_core

Macro collection 

Source 
collection!() { /* proc-macro */ }
Expand description

Generate an anonymous struct which implements kas::Collection

§Syntax

Collection :
   collection! [ Items? ]

Items :
   (Item ,)* Item ,?

In this case, Item may be:

  • A string literal (interpreted as a label widget), optionally followed by an align or pack method call
  • An expression yielding an object implementing Widget<Data = _A>

In case all Item instances are a string literal, the data type of the collection! widget will be (); otherwise the data type of the widget is _A where _A is a generic type parameter of the widget.

For example usage, see List.