Module coerce 

Safe numeric conversion helpers.

Only contains helpers for conversions where std’s From/TryFrom traits don’t exist. For integer↔integer conversions, use From/TryFrom directly (with ? — From<TryFromIntError> is implemented for RError).

Functions

f64_to_i32

f64 → i32 — truncation toward zero, then check range.

f64_to_i64

f64 → i64 — truncation toward zero (R as.integer() semantics). Fails for NaN, ±Inf, or values outside i64 range.

f64_to_u32

f64 → u32 — truncation toward zero, then check range.

f64_to_u64

f64 → u64 — truncation toward zero, then check non-negative.

f64_to_usize

f64 → usize — truncation toward zero, then check non-negative.

i64_to_f64

i64 → f64 — always produces a valid f64, but may lose precision for |v| > 2^53. This matches R semantics where as.double() on an integer always succeeds.

u64_to_f64

u64 → f64 — always produces a valid f64, but may lose precision for v > 2^53.

usize_to_f64

usize → f64 — always produces a valid f64, but may lose precision for v > 2^53.