68 lines
2.6 KiB
Rust
68 lines
2.6 KiB
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use std::old_io::{File, Command};
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use std::iter::repeat;
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use std::rand::{thread_rng, Rng};
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use std::{char, os};
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// creates a file with `fn main() { <random ident> }` and checks the
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// compiler emits a span of the appropriate length (for the
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// "unresolved name" message); currently just using the number of code
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// points, but should be the number of graphemes (FIXME #7043)
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fn random_char() -> char {
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let mut rng = thread_rng();
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// a subset of the XID_start Unicode table (ensuring that the
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// compiler doesn't fail with an "unrecognised token" error)
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let (lo, hi): (u32, u32) = match rng.gen_range(1u32, 4u32 + 1) {
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1 => (0x41, 0x5a),
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2 => (0xf8, 0x1ba),
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3 => (0x1401, 0x166c),
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_ => (0x10400, 0x1044f)
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};
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char::from_u32(rng.gen_range(lo, hi + 1)).unwrap()
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}
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fn main() {
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let args = os::args();
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let rustc = args[1].as_slice();
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let tmpdir = Path::new(args[2].as_slice());
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let main_file = tmpdir.join("span_main.rs");
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for _ in 0u..100 {
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let n = thread_rng().gen_range(3u, 20);
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{
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let _ = write!(&mut File::create(&main_file).unwrap(),
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"#![feature(non_ascii_idents)] fn main() {{ {} }}",
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// random string of length n
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(0..n).map(|_| random_char()).collect::<String>());
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}
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// rustc is passed to us with --out-dir and -L etc., so we
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// can't exec it directly
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let result = Command::new("sh")
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.arg("-c")
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.arg(format!("{} {}",
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rustc,
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main_file.as_str()
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.unwrap()).as_slice())
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.output().unwrap();
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let err = String::from_utf8_lossy(result.error.as_slice());
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// the span should end the line (e.g no extra ~'s)
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let expected_span = format!("^{}\n", repeat("~").take(n - 1)
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.collect::<String>());
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assert!(err.contains(expected_span.as_slice()));
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}
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}
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