Macro laby::classes

classes!() { /* proc-macro */ }

Wraps multiple values implementing Render into one, with whitespace as the delimiter.

This macro behaves similarly to the frag! macro. The only difference is that all wrapped values will be rendered sequentially in the order of arguments, but with a single whitespace character ' ' to delimit each value.

It is intended to be used to generate an interpolated string for the class attribute in an HTML markup.

Example

The following example generates a class string with several values interpolated. Note that four is not included because it is None, but the whitespace that delimits four is still rendered regardless.

let two = Some("two");
let four: Option<&str> = None;
let six = 6;

let s = classes!("one", two, "three", four, "five", six);
assert_eq!(render!(s), "one two three  five 6");