ftruncate() — internals

ftruncate() — internals

Where it lives

• Signature: src/builtins/io/ftruncate.rs
• Lowering: src/codegen/lower_inst/builtins/io.rs:3206 (lower_ftruncate)
• Function symbol: lower_ftruncate()

Lowering notes

• Lowers ftruncate(stream, size) through the shared fd truncate runtime helper.

Runtime helpers

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

Signature summary

function ftruncate(resource $stream, int $size): bool

What the type checker enforces

• Arity: takes exactly 2 arguments.

Eval interpreter (magician)

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

Cross-references

• User reference for ftruncate()