array_diff_key() — internals

array_diff_key() — internals

Where it lives

• Signature: src/builtins/array/array_diff_key.rs
• Lowering: src/codegen/lower_inst/builtins/arrays.rs:895 (lower_array_diff_key)
• Function symbol: lower_array_diff_key()

Lowering notes

• Lowers array_diff_key() for two associative arrays by filtering first-operand keys.

Runtime helpers

The following runtime helpers are referenced:

• __rt_array_diff_key
• __rt_array_intersect_key

Signature summary

function array_diff_key(array $array, ...$arrays): array

What the type checker enforces

• Arity: takes exactly 1 argument.
• Variadic: collects excess arguments into $arrays.

Eval interpreter (magician)

• Declaration: crates/elephc-magician/src/interpreter/builtins/array/array_diff_key.rs (eval_builtin!)
• Dispatch hooks: direct, values
• Variadic: collects excess arguments into $arrays.

Cross-references

• User reference for array_diff_key()