Standard Library: Attributes & Control Flow

if

[if: condition]

Marks the next block as conditional and resolves it only when condition is truthy.

[elseif: condition]

Marks the next block as an else if branch following a previous conditional block.

[else]

Marks the next block as the fallback branch after a previous conditional block.

[mksel: selector-mode; match-value?]

Creates and returns a selector with the specified mode. match mode requires a match value; all other modes reject one.

Mode	Description
`random`	Select a random element each time. (default)
`one`	Select the same, random element each time.
`forward`	Select in a wrapping sequence from first to last.
`forward-clamp`	Select from first to last, then repeat the last element forever.
`forward-mirror`	Select from first to last, then last to first, then start over.
`reverse`	Select in a wrapping reverse sequence from last to first.
`reverse-clamp`	Select from last to first, then repeat the first element forever.
`reverse-mirror`	Select in a from last to first, then first to last, then start over.
`deck`	Select each element once in a random sequence, then reshuffles.
`deck-loop`	Select each element once in a wrapping random sequence, without reshuffling.
`deck-clamp`	Select each element once in a random sequence, repeating the final element.
`deck-mirror`	Select each element once in a random sequence, then repeats the sequence backwards before reshuffling.
`ping`	Select from first to last, switching directions when a boundary element is reached.
`pong`	Select from last to first, switching directions when a boundary element is reached.
`no-double`	Select a random element each time, ensuring the same element never occurs twice in a row.
`match`	Select from elements whose `@on` trigger equals the selector's stored value; otherwise, use untagged fallback elements. Cursor operations are unsupported.

[rep: reps]

Sets the repetition count or repetition mode for the next block.

[sel: selector?]

Sets the active selector for the next block. With no argument, prints the current selector or nothing.

[match: value]

Sets the active selector for the next block to a match selector bound to value.

[sep: separator]

Sets the separator value for repeated block iterations.

[mut: mutator?]

Sets the mutator function for the next block, or clears it when passed nothing.

[sel-skip: selector; n?]

Advances selector without printing any selected value. This is unsupported for match selectors.

[sel-freeze: selector; frozen?]

Sets the frozen state of selector. Omitting frozen freezes it. This is unsupported for match selectors.

[sel-frozen: selector]

Prints whether selector is currently frozen. This is unsupported for match selectors.

[reset-attrs]

Resets the current attribute state back to the runtime defaults.

[step]

Prints the current repeater step value using a 1-based index.

[step-index]

Prints the zero-based iteration index of the active repeater.

[step-count]

Prints the total number of iterations scheduled for the active repeater. Infinite repeaters report 0.