localtime() — internals

localtime() — internals

Where it lives

• Signature: src/builtins/system/localtime.rs
• Lowering: src/codegen/lower_inst/builtins/system.rs:220 (lower_localtime)
• Function symbol: lower_localtime()

Lowering notes

• Lowers localtime([$timestamp[, $associative]]) through the shared decomposition runtime helper.
• __rt_localtime reads the timestamp from the integer result register (x0/rax) and the
• associative-keys flag from the second argument register (x1/rsi) — an irregular ABI, so the
• two values are staged in scratch (the flag may unbox a Mixed, clobbering the timestamp) and
• reloaded into their distinct registers with no intervening call, then the returned hash pointer
• is boxed into a Mixed associative-array cell like getdate.

Runtime helpers

The following runtime helpers are referenced:

• __rt_hrtime
• __rt_localtime

Signature summary

function localtime(int $timestamp = -1, bool $associative = false): array

What the type checker enforces

• Arity: takes 0–2 arguments (2 optional).

Eval interpreter (magician)

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

Cross-references

• User reference for localtime()