a828e79480
This commit tweaks the interface of the `std::env` module to make it more ergonomic for common usage: * `env::var` was renamed to `env::var_os` * `env::var_string` was renamed to `env::var` * `env::args` was renamed to `env::args_os` * `env::args` was re-added as a panicking iterator over string values * `env::vars` was renamed to `env::vars_os` * `env::vars` was re-added as a panicking iterator over string values. This should make common usage (e.g. unicode values everywhere) more ergonomic as well as "the default". This is also a breaking change due to the differences of what's yielded from each of these functions, but migration should be fairly easy as the defaults operate over `String` which is a common type to use. [breaking-change]
78 lines
2.2 KiB
Rust
78 lines
2.2 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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//! Simple backtrace functionality (to print on panic)
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#![allow(non_camel_case_types)]
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use prelude::v1::*;
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use env;
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use sync::atomic::{self, Ordering};
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pub use sys::backtrace::write;
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// For now logging is turned off by default, and this function checks to see
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// whether the magical environment variable is present to see if it's turned on.
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pub fn log_enabled() -> bool {
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static ENABLED: atomic::AtomicIsize = atomic::ATOMIC_ISIZE_INIT;
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match ENABLED.load(Ordering::SeqCst) {
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1 => return false,
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2 => return true,
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_ => {}
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}
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let val = match env::var_os("RUST_BACKTRACE") {
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Some(..) => 2,
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None => 1,
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};
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ENABLED.store(val, Ordering::SeqCst);
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val == 2
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}
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#[cfg(test)]
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mod test {
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use prelude::v1::*;
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use sys_common;
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macro_rules! t { ($a:expr, $b:expr) => ({
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let mut m = Vec::new();
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sys_common::backtrace::demangle(&mut m, $a).unwrap();
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assert_eq!(String::from_utf8(m).unwrap(), $b);
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}) }
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#[test]
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fn demangle() {
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t!("test", "test");
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t!("_ZN4testE", "test");
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t!("_ZN4test", "_ZN4test");
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t!("_ZN4test1a2bcE", "test::a::bc");
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}
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#[test]
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fn demangle_dollars() {
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t!("_ZN4$RP$E", ")");
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t!("_ZN8$RF$testE", "&test");
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t!("_ZN8$BP$test4foobE", "*test::foob");
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t!("_ZN9$u20$test4foobE", " test::foob");
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}
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#[test]
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fn demangle_many_dollars() {
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t!("_ZN13test$u20$test4foobE", "test test::foob");
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t!("_ZN12test$BP$test4foobE", "test*test::foob");
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}
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#[test]
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fn demangle_windows() {
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t!("ZN4testE", "test");
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t!("ZN13test$u20$test4foobE", "test test::foob");
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t!("ZN12test$RF$test4foobE", "test&test::foob");
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}
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}
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