src/test/run-pass/issue-17121.rs

   1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // pretty-expanded FIXME #23616
  12
  13 #![feature(question_mark)]
  14
  15 use std::fs::File;
  16 use std::io::{self, BufReader, Read};
  17
  18 struct Lexer<R: Read>
  19 {
  20     reader: BufReader<R>,
  21 }
  22
  23 impl<R: Read> Lexer<R>
  24 {
  25     pub fn new_from_reader(r: R) -> Lexer<R>
  26     {
  27         Lexer{reader: BufReader::new(r)}
  28     }
  29
  30     pub fn new_from_file(p: &str) -> io::Result<Lexer<File>>
  31     {
  32         Ok(Lexer::new_from_reader(File::open(p)?))
  33     }
  34
  35     pub fn new_from_str<'a>(s: &'a str) -> Lexer<&'a [u8]>
  36     {
  37         Lexer::new_from_reader(s.as_bytes())
  38     }
  39 }
  40
  41 fn main() {}