38cb91e66c
These two attributes are used to change the entry point into a Rust program, but
for now they're being put behind feature gates until we have a chance to think
about them a little more. The #[start] attribute specifically may have its
signature changed.
This is a breaking change to due the usage of these attributes generating errors
by default now. If your crate is using these attributes, add this to your crate
root:
#![feature(start)] // if you're using the #[start] attribute
#![feature(main)] // if you're using the #[main] attribute
cc #20064
65 lines
1.9 KiB
Rust
65 lines
1.9 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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#![feature(start)]
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use std::ffi;
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use std::io::process::{Command, ProcessOutput};
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use std::os;
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use std::rt::unwind::try;
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use std::rt;
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use std::str;
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use std::thread::Thread;
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use std::thunk::Thunk;
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#[start]
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fn start(argc: int, argv: *const *const u8) -> int {
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if argc > 1 {
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unsafe {
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match **argv.offset(1) {
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1 => {}
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2 => println!("foo"),
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3 => assert!(try(|| {}).is_ok()),
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4 => assert!(try(|| panic!()).is_err()),
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5 => assert!(Command::new("test").spawn().is_err()),
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_ => panic!()
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}
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}
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return 0
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}
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let args = unsafe {
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range(0, argc as uint).map(|i| {
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let ptr = *argv.offset(i as int) as *const _;
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ffi::c_str_to_bytes(&ptr).to_vec()
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}).collect::<Vec<_>>()
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};
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let me = args[0].as_slice();
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let x: &[u8] = &[1u8];
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pass(Command::new(me).arg(x).output().unwrap());
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let x: &[u8] = &[2u8];
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pass(Command::new(me).arg(x).output().unwrap());
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let x: &[u8] = &[3u8];
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pass(Command::new(me).arg(x).output().unwrap());
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let x: &[u8] = &[4u8];
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pass(Command::new(me).arg(x).output().unwrap());
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let x: &[u8] = &[5u8];
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pass(Command::new(me).arg(x).output().unwrap());
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0
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}
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fn pass(output: ProcessOutput) {
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if !output.status.success() {
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println!("{:?}", str::from_utf8(output.output.as_slice()));
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println!("{:?}", str::from_utf8(output.error.as_slice()));
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}
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}
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