round() — internals

round() — internals

Where it lives

• Signature: src/builtins/math/round.rs
• Lowering: src/codegen/lower_inst/builtins/math.rs:186 (lower_round)
• Function symbol: lower_round()

Lowering notes

• Lowers round() for concrete integer-like and floating operands.

Runtime helpers

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

Signature summary

function round(float $num, int $precision = 0): float

What the type checker enforces

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

Eval interpreter (magician)

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

Cross-references

• User reference for round()