call_user_func() — internals

call_user_func() — internals

Where it lives

• Signature: src/builtins/callables/call_user_func.rs
• Lowering: src/codegen/lower_inst/builtins/arrays.rs:37 (lower_call_user_func_builtin_escape)
• Function symbol: lower_call_user_func_builtin_escape()

Lowering notes

• Rejects call_user_func* calls that escaped the dedicated EIR callback lowering path.

Runtime helpers

The following runtime helpers are referenced:

• __rt_array_product
• __rt_array_sum

Signature summary

function call_user_func(callable $callback, ...$args): mixed

What the type checker enforces

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

Eval interpreter (magician)

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

Cross-references

• User reference for call_user_func()