array_filter() — internals

array_filter() — internals

Where it lives

• Signature: src/builtins/array/array_filter.rs
• Lowering: src/codegen/lower_inst/builtins/arrays.rs:221 (lower_array_filter)
• Function symbol: lower_array_filter()

Lowering notes

• Lowers array_filter() for static and first-class callbacks through the runtime helper.

Runtime helpers

The following runtime helpers are referenced:

• __rt_array_filter
• __rt_array_filter_refcounted

Signature summary

function array_filter(array $array, callable $callback = null, int $mode = 0): array

What the type checker enforces

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

Eval interpreter (magician)

• Declaration: crates/elephc-magician/src/interpreter/builtins/array/array_filter.rs (eval_builtin!)
• Dispatch hooks: direct, values

Cross-references

• User reference for array_filter()