is_array() — internals

is_array() — internals

Where it lives

• Signature: src/builtins/types/is_array.rs
• Lowering: src/codegen/lower_inst/builtins.rs:1621 (lower_is_array)
• Function symbol: lower_is_array()

Lowering notes

• Lowers is_array(): true for statically-known arrays/hashes, or a boxed Mixed/Union value
• whose runtime tag is an indexed (4) or associative (5) array. An iterable-typed value is
• not treated as a definite array here (it may hold a Traversable); use is_iterable for that.

Runtime helpers

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

Signature summary

function is_array(mixed $value): bool

What the type checker enforces

• Arity: takes exactly 1 argument.

Eval interpreter (magician)

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

Cross-references

• User reference for is_array()