pub fn push_class(out: &mut String, name: &str, opts: &Emit)Expand description
A prefixed class name, written into a buffer the caller already has.
The form the emitters use, and the reason it exists is escape_into’s:
every class on every element went through a format! before 0.40.0,
including the default case where the prefix is empty and the answer is the
argument. A described table row carried roughly eighty transient
allocations, and this and the escaper were most of them.
class stays for callers holding a name rather than a buffer.