dirname() — internals

dirname() — internals

Where it lives

• Signature: src/builtins/io/dirname.rs
• Lowering: src/codegen/lower_inst/builtins/io.rs:4571 (lower_dirname)
• Function symbol: lower_dirname()

Lowering notes

• Lowers dirname(path, levels?) through the target-aware runtime helper.

Runtime helpers

The following runtime helpers are referenced:

• __rt_dirname
• __rt_dirname_levels

Signature summary

function dirname(string $path, int $levels = 1): string

What the type checker enforces

• Arity: takes 1–2 arguments (1 optional).

Eval interpreter (magician)

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

Cross-references

• User reference for dirname()