stream_filter_prepend() — internals

stream_filter_prepend() — internals

Where it lives

• Signature: src/builtins/io/stream_filter_prepend.rs
• Lowering: src/codegen/lower_inst/builtins/io.rs:1548 (lower_stream_filter_attach)
• Function symbol: lower_stream_filter_attach()

Lowering notes

• Lowers stream_filter_append and stream_filter_prepend.

Runtime helpers

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

Signature summary

function stream_filter_prepend(resource $stream, string $filtername, int $read_write = 3, mixed $params = null): mixed

What the type checker enforces

• Arity: takes 2–4 arguments (2 optional).

Eval interpreter (magician)

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

Cross-references

• User reference for stream_filter_prepend()