nodes.functions

A single parameter in a {% def %} with optional type annotation.

Function definition: {% def name(params) %}...{% end %}

Parameterized renderable unit: {% region name(params) %}...{% end %}.

Compiles to BOTH a block function (for render_block) AND a callable (for {{ name(args) }}). Parameters make it self-contained.

Slot placeholder inside {% def %}: {% slot %} or {% slot name %}

With scoped bindings: {% slot name let:item=expr %}...default...{% end %} Bindings expose data from the def body to the caller's slot content. When a body is present, it serves as default content when no caller overrides this slot.

Named slot content inside {% call %}: {% slot name %}...{% end %}

With scoped params: {% slot name let:item, let:index %}...{% end %} Params declare which scoped bindings the slot body consumes.

Call function with slot content: {% call name(args) %}...{% end %}