//ww:run-exit 52
// Migrated from 778_bufio_vstream_run row scanner_lines.
package main;
import bufio;
import errors;
import memio;
import io;
export fn main() i32 = {
    let raw: [8]u8;
    raw[0]=97u8; raw[1]=98u8; raw[2]=10u8;
    raw[3]=99u8; raw[4]=10u8;
    raw[5]=100u8; raw[6]=101u8; raw[7]=102u8;
    let mst: memio.stream = memio.dynamicfrom(raw[0:8]);
    let vs: io.stream = &mst.vt;
    let win: [16]u8;
    let sc: bufio.scanner = bufio.newscannerbuf(vs, win[0:16]);
    let ok: i32 = 0;
    match (bufio.scanline(&sc)) {
    case let s: str => { if (s.len == 2 && s[0] == 97u8 && s[1] == 98u8) { ok += 1; }; };
    case io.eof => { return 81; };
    case let e: io.error => { return 82; };
    case errors.overflow => { return 83; };
    };
    match (bufio.scanline(&sc)) {
    case let s: str => { if (s.len == 1 && s[0] == 99u8) { ok += 1; }; };
    case io.eof => { return 84; };
    case let e: io.error => { return 85; };
    case errors.overflow => { return 86; };
    };
    match (bufio.scanline(&sc)) {
    case let s: str => { return 87; };
    case io.eof => { ok += 1; };
    case let e: io.error => { return 88; };
    case errors.overflow => { return 89; };
    };
    bufio.finish(&sc);
    if (ok != 3) { return 90; };
    return 52;
};