fclose() — internals

fclose() — internals

Where it lives

• Signature: src/builtins/io/fclose.rs
• Lowering: src/codegen/lower_inst/builtins/io.rs:2705 (lower_fclose)
• Function symbol: lower_fclose()

Lowering notes

• Lowers fclose(stream) after validating and unboxing the stream handle.

Runtime helpers

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

Signature summary

function fclose(resource $stream): bool

What the type checker enforces

• Arity: takes exactly 1 argument.

Eval interpreter (magician)

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

Cross-references

• User reference for fclose()