array_is_list() — internals

array_is_list() — internals

Where it lives

• Signature: src/builtins/array/array_is_list.rs
• Lowering: src/codegen/lower_inst/builtins/arrays.rs:1150 (lower_array_is_list)
• Function symbol: lower_array_is_list()

Lowering notes

• Lowers array_is_list() to the __rt_array_is_list runtime predicate, returning a bool.
• The runtime helper accepts any array kind (indexed, associative hash, or boxed mixed cell) and
• reports 1 when the keys are the sequential integers 0..n-1 in insertion order, 0 otherwise.

Runtime helpers

The following runtime helpers are referenced:

• __rt_array_edge_key
• __rt_array_is_list
• __rt_mixed_from_value

Signature summary

function array_is_list(mixed $array): bool

What the type checker enforces

• Arity: takes exactly 1 argument.

Eval interpreter (magician)

Not callable from eval’d code — the magician interpreter has no entry for this builtin.

Cross-references

• User reference for array_is_list()