Function format_char

compiler/src/modules/vm/handlers/format.rs:172–179

(v: Val, s: &Spec)

}

fn format_char(v: Val, s: &Spec) -> Result<String, &'static str> {
    if !v.is_int() { return Err("'c' format spec requires an integer"); }
    let i = v.as_int();
    if !(0..=0x10FFFF).contains(&i) { return Err(C_RANGE_ERR); }
    let ch = char::from_u32(i as u32).ok_or("'c' format spec arg not a valid char")?;
    // 'c' is numeric for alignment: it defaults to right-align like ints.
    Ok(pad_aligned(s, &ch.to_string(), 0))
}

fn format_int(v: Val, s: &Spec, heap: &HeapPool) -> Result<String, &'static str> {
    let (neg, mag) = int_to_decimal_parts(v, heap)?;