Chars

# char conversions (decided 2026-09-21): code by name, text ↔ char and unit ↔ unit as failing conversions.
MAIN {
    let 'a' := `A`;
    std::print.useful[char.code['a'], newln];                        # 65 — the number under it
    let 'seven' := to.int32[to.str.utf8[`7`]] otherwise -1;        # 7 — a digit's value is a text parse
    std::print.useful['seven', newln];
    let 'b' := char.point.from_code[66] otherwise `?`;
    let 'bad' := char.point.from_code[1_114_112] otherwise `?`;    # past the last code point: not_a_char
    std::print.useful['b', 'bad', newln];                            # B?
    let 'one' := to.char.point["Z"] otherwise `?`;                 # text of exactly one point
    let 'two' := to.char.point["ZZ"] otherwise `?`;                # not_one_char
    std::print.useful['one', 'two', newln];                          # Z?
    let 'g': char.grapheme = `é`;
    let 'p' := to.char.point['g'] otherwise `?`;                   # this é is one point: fine
    let 'y' := to.char.byte['p'] otherwise `?`;                    # é is two bytes: not_one_byte
    std::print.useful['p', 'y', newln];                              # é?
    let 'up' := to.char.grapheme[`x`];                             # up never loses anything: no otherwise
    std::print.useful[to.str.utf8['up'] ++ "!", newln];               # x!
}