// Skeleton

prefix //

The rules for // have not been written yet. Everything below is extracted rather than authored: the official documentation supplies the classification, and the interpreters were asked directly about the rest.

What is established #

Classification #

// is parsed as a prefix at the symbolic unary precedence level, left-associative.

That is level 5 of 27 on the ladder, counting from the tightest. Operators sharing a level bind equally; grouping among them is decided by associativity alone.

Shares its precedence level with #

?, !, +, -, ~, |, +^, ~^, ?^, ^.

These all bind equally tightly, so an expression mixing them groups by associativity alone.

Covered upstream #

The official documentation has a section for this construct: docs.raku.org. Until the rules here are written, that is the better reference.