Commit Graph

17 Commits

Author SHA1 Message Date
Steve Klabnik
d1ab3799bd Update syntax of ignored test. 2015-01-17 10:51:07 -05:00
Luqman Aden
38aca17c47 Remove libdebug and update tests. 2014-10-16 11:15:34 -04:00
Richo Healey
201cd9e3f9 Ignore tests broken by failing on ICE 2014-05-06 21:47:25 -07:00
Corey Richardson
0459ee77d0 Fix fallout from std::libc separation 2014-04-04 09:31:44 -07:00
Alex Crichton
cc6ec8df95 log: Introduce liblog, the old std::logging
This commit moves all logging out of the standard library into an external
crate. This crate is the new crate which is responsible for all logging macros
and logging implementation. A few reasons for this change are:

* The crate map has always been a bit of a code smell among rust programs. It
  has difficulty being loaded on almost all platforms, and it's used almost
  exclusively for logging and only logging. Removing the crate map is one of the
  end goals of this movement.

* The compiler has a fair bit of special support for logging. It has the
  __log_level() expression as well as generating a global word per module
  specifying the log level. This is unfairly favoring the built-in logging
  system, and is much better done purely in libraries instead of the compiler
  itself.

* Initialization of logging is much easier to do if there is no reliance on a
  magical crate map being available to set module log levels.

* If the logging library can be written outside of the standard library, there's
  no reason that it shouldn't be. It's likely that we're not going to build the
  highest quality logging library of all time, so third-party libraries should
  be able to provide just as high-quality logging systems as the default one
  provided in the rust distribution.

With a migration such as this, the change does not come for free. There are some
subtle changes in the behavior of liblog vs the previous logging macros:

* The core change of this migration is that there is no longer a physical
  log-level per module. This concept is still emulated (it is quite useful), but
  there is now only a global log level, not a local one. This global log level
  is a reflection of the maximum of all log levels specified. The previously
  generated logging code looked like:

    if specified_level <= __module_log_level() {
        println!(...)
    }

  The newly generated code looks like:

    if specified_level <= ::log::LOG_LEVEL {
        if ::log::module_enabled(module_path!()) {
            println!(...)
        }
    }

  Notably, the first layer of checking is still intended to be "super fast" in
  that it's just a load of a global word and a compare. The second layer of
  checking is executed to determine if the current module does indeed have
  logging turned on.

  This means that if any module has a debug log level turned on, all modules
  with debug log levels get a little bit slower (they all do more expensive
  dynamic checks to determine if they're turned on or not).

  Semantically, this migration brings no change in this respect, but
  runtime-wise, this will have a perf impact on some code.

* A `RUST_LOG=::help` directive will no longer print out a list of all modules
  that can be logged. This is because the crate map will no longer specify the
  log levels of all modules, so the list of modules is not known. Additionally,
  warnings can no longer be provided if a malformed logging directive was
  supplied.

The new "hello world" for logging looks like:

    #[phase(syntax, link)]
    extern crate log;

    fn main() {
        debug!("Hello, world!");
    }
2014-03-15 22:26:36 -07:00
Alex Crichton
daf5f5a4d1 Drop the '2' suffix from logging macros
Who doesn't like a massive renaming?
2013-10-22 08:09:56 -07:00
Alex Crichton
ebf5f406ef cfail: Remove usage of fmt! 2013-09-30 23:21:20 -07:00
Huon Wilson
e4f7561bcd Clean-up tests after debug!/std-macros change.
The entire testsuite is converted to using info! rather than debug!
because some depend on the code within the debug! being trans'd.
2013-07-17 03:10:13 +10:00
Patrick Walton
206ab89629 librustc: Stop reexporting the standard modules from prelude. 2013-05-29 19:04:53 -07:00
Brian Anderson
82f190355b Remove uses of log 2013-03-11 23:19:42 -07:00
Graydon Hoare
d1affff623 Reliciense makefiles and testsuite. Yup. 2012-12-10 17:32:58 -08:00
Graydon Hoare
debb7e4641 Switch 'native' to 'extern' (or 'foreign' in some descriptions) 2012-07-03 16:11:00 -07:00
Graydon Hoare
6f5853f5a1 Libc/os/run/rand/io reorganization. Close #1373. Close #1638.
- Move io, run and rand to core.
 - Remove incorrect ctypes module (use libc).
 - Remove os-specific modules for os and fs.
 - Split fs between core::path and core::os.
2012-03-12 20:08:29 -07:00
Marijn Haverbeke
856a544d0c Remove native types from stdlib 2012-02-01 12:23:13 +01:00
Graydon Hoare
f0dfbe7b1b Register new snapshots, purge log_err and log_full in favour of log(...). 2011-12-22 17:53:53 -08:00
Graydon Hoare
8b580954fe Register snapshots and switch logging over to use of log_full or #error / #debug. 2011-12-22 14:42:52 -08:00
Matt Brubeck
361adf9f86 Add tests for the 'as' (cast) operator 2011-10-27 13:37:35 -07:00