iterator_apply() — internals

iterator_apply() — internals

Where it lives

• Signature: src/builtins/spl/iterator_apply.rs
• Lowering: src/codegen/lower_inst/builtins/spl.rs:290 (lower_iterator_apply)
• Function symbol: lower_iterator_apply()

Lowering notes

• Lowers iterator_apply() over supported Traversable sources and callback forms.

Runtime helpers

No direct __rt_* helpers captured — the lowering is inlined or routes through another builtin.

Signature summary

function iterator_apply(traversable $iterator, callable $callback, array $args = null): int

What the type checker enforces

• Arity: takes 2–3 arguments (1 optional).

Cross-references

• User reference for iterator_apply()