log-0.4.6/.gitignore010066400017500001750000000000231332640070300125060ustar0000000000000000target/ Cargo.lock log-0.4.6/.travis.yml010066400017500001750000000007761332640070300126460ustar0000000000000000language: rust sudo: false rust: - 1.16.0 - stable - beta - nightly script: - cargo build --verbose - cargo build --verbose --features serde - cargo build --verbose --features std - cargo test --verbose - cargo test --verbose --features serde - cargo test --verbose --features std - cargo run --verbose --manifest-path tests/max_level_features/Cargo.toml - cargo run --verbose --manifest-path tests/max_level_features/Cargo.toml --release notifications: email: on_success: never log-0.4.6/appveyor.yml010066400017500001750000000010601332640070300131100ustar0000000000000000environment: matrix: - TARGET: x86_64-pc-windows-msvc - TARGET: i686-pc-windows-msvc - TARGET: i686-pc-windows-gnu install: - ps: Start-FileDownload "https://static.rust-lang.org/dist/rust-nightly-${env:TARGET}.exe" - rust-nightly-%TARGET%.exe /VERYSILENT /NORESTART /DIR="C:\Program Files (x86)\Rust" - SET PATH=%PATH%;C:\Program Files (x86)\Rust\bin - SET PATH=%PATH%;C:\MinGW\bin - rustc -V - cargo -V build: false test_script: - cargo test --verbose - cargo test --verbose --features serde - cargo test --verbose --features std log-0.4.6/Cargo.toml.orig010066400017500001750000000021171336513322600134210ustar0000000000000000[package] name = "log" version = "0.4.6" # remember to update html_root_url authors = ["The Rust Project Developers"] license = "MIT/Apache-2.0" readme = "README.md" repository = "https://github.com/rust-lang/log" documentation = "https://docs.rs/log" homepage = "https://github.com/rust-lang/log" description = """ A lightweight logging facade for Rust """ categories = ["development-tools::debugging"] keywords = ["logging"] [package.metadata.docs.rs] features = ["std", "serde"] [[test]] name = "filters" harness = false [features] max_level_off = [] max_level_error = [] max_level_warn = [] max_level_info = [] max_level_debug = [] max_level_trace = [] release_max_level_off = [] release_max_level_error = [] release_max_level_warn = [] release_max_level_info = [] release_max_level_debug = [] release_max_level_trace = [] std = [] [badges] travis-ci = { repository = "rust-lang-nursery/log" } appveyor = { repository = "alexcrichton/log" } [dependencies] cfg-if = "0.1.2" serde = { version = "1.0", optional = true, default-features = false } [dev-dependencies] serde_test = "1.0" log-0.4.6/Cargo.toml0000644000000030730000000000000076640ustar00# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO # # When uploading crates to the registry Cargo will automatically # "normalize" Cargo.toml files for maximal compatibility # with all versions of Cargo and also rewrite `path` dependencies # to registry (e.g. crates.io) dependencies # # If you believe there's an error in this file please file an # issue against the rust-lang/cargo repository. If you're # editing this file be aware that the upstream Cargo.toml # will likely look very different (and much more reasonable) [package] name = "log" version = "0.4.6" authors = ["The Rust Project Developers"] description = "A lightweight logging facade for Rust\n" homepage = "https://github.com/rust-lang/log" documentation = "https://docs.rs/log" readme = "README.md" keywords = ["logging"] categories = ["development-tools::debugging"] license = "MIT/Apache-2.0" repository = "https://github.com/rust-lang/log" [package.metadata.docs.rs] features = ["std", "serde"] [[test]] name = "filters" harness = false [dependencies.cfg-if] version = "0.1.2" [dependencies.serde] version = "1.0" optional = true default-features = false [dev-dependencies.serde_test] version = "1.0" [features] max_level_debug = [] max_level_error = [] max_level_info = [] max_level_off = [] max_level_trace = [] max_level_warn = [] release_max_level_debug = [] release_max_level_error = [] release_max_level_info = [] release_max_level_off = [] release_max_level_trace = [] release_max_level_warn = [] std = [] [badges.appveyor] repository = "alexcrichton/log" [badges.travis-ci] repository = "rust-lang-nursery/log" log-0.4.6/CHANGELOG.md010066400017500001750000000123201336513337600123460ustar0000000000000000# Change Log ## [Unreleased] ## [0.4.6] - 2018-10-27 ### Improved * Support 2018-style macro import for the `log_enabled!` macro. ## [0.4.5] - 2018-09-03 ### Improved * Make `log`'s internal helper macros less likely to conflict with user-defined macros. ## [0.4.4] - 2018-08-17 ### Improved * Support 2018-style imports of the log macros. ## [0.4.3] - 2018-06-29 ### Improved * More code generation improvements. ## [0.4.2] - 2018-06-05 ### Improved * Log invocations now generate less code. ### Fixed * Example Logger implementations now properly set the max log level. ## [0.4.1] - 2017-12-30 ### Fixed * Some doc links were fixed. ## [0.4.0] - 2017-12-24 The changes in this release include cleanup of some obscure functionality and a more robust public API designed to support bridges to other logging systems, and provide more flexibility to new features in the future. ### Compatibility Vast portions of the Rust ecosystem use the 0.3.x release series of log, and we don't want to force the community to go through the pain of upgrading every crate to 0.4.x at the exact same time. Along with 0.4.0, we've published a new 0.3.9 release which acts as a "shim" over 0.4.0. This will allow crates using either version to coexist without losing messages from one side or the other. There is one caveat - a log message generated by a crate using 0.4.x but consumed by a logging implementation using 0.3.x will not have a file name or module path. Applications affected by this can upgrade their logging implementations to one using 0.4.x to avoid losing this information. The other direction does not lose any information, fortunately! **TL;DR** Libraries should feel comfortable upgrading to 0.4.0 without treating that as a breaking change. Applications may need to update their logging implementation (e.g. env-logger) to a newer version using log 0.4.x to avoid losing module and file information. ### New * The crate is now `no_std` by default. * `Level` and `LevelFilter` now implement `Serialize` and `Deserialize` when the `serde` feature is enabled. * The `Record` and `Metadata` types can now be constructed by third-party code via a builder API. * The `logger` free function returns a reference to the logger implementation. This, along with the ability to construct `Record`s, makes it possible to bridge from another logging framework to this one without digging into the private internals of the crate. The standard `error!` `warn!`, etc, macros now exclusively use the public API of the crate rather than "secret" internal APIs. * `Log::flush` has been added to allow crates to tell the logging implementation to ensure that all "in flight" log events have been persisted. This can be used, for example, just before an application exits to ensure that asynchronous log sinks finish their work. ### Removed * The `shutdown` and `shutdown_raw` functions have been removed. Supporting shutdown significantly complicated the implementation and imposed a performance cost on each logging operation. * The `log_panics` function and its associated `nightly` Cargo feature have been removed. Use the [log-panics](https://crates.io/crates/log-panics) instead. ### Changed * The `Log` prefix has been removed from type names. For example, `LogLevelFilter` is now `LevelFilter`, and `LogRecord` is now `Record`. * The `MaxLogLevelFilter` object has been removed in favor of a `set_max_level` free function. * The `set_logger` free functions have been restructured. The logger is now directly passed to the functions rather than a closure which returns the logger. `set_logger` now takes a `&'static Log` and is usable in `no_std` contexts in place of the old `set_logger_raw`. `set_boxed_logger` is a convenience function which takes a `Box` but otherwise acts like `set_logger`. It requires the `std` feature. * The `file` and `module_path` values in `Record` no longer have the `'static` lifetime to support integration with other logging frameworks that don't provide a `'static` lifetime for the equivalent values. * The `file`, `line`, and `module_path` values in `Record` are now `Option`s to support integration with other logging frameworks that don't provide those values. ### In the Future * We're looking to add support for *structured* logging - the inclusion of extra key-value pairs of information in a log event in addition to the normal string message. This should be able to be added in a backwards compatible manner to the 0.4.x series when the design is worked out. ## Older Look at the [release tags] for information about older releases. [Unreleased]: https://github.com/rust-lang-nursery/log/compare/0.4.6...HEAD [0.4.6]: https://github.com/rust-lang-nursery/log/compare/0.4.5...0.4.6 [0.4.5]: https://github.com/rust-lang-nursery/log/compare/0.4.4...0.4.5 [0.4.4]: https://github.com/rust-lang-nursery/log/compare/0.4.3...0.4.4 [0.4.3]: https://github.com/rust-lang-nursery/log/compare/0.4.2...0.4.3 [0.4.2]: https://github.com/rust-lang-nursery/log/compare/0.4.1...0.4.2 [0.4.1]: https://github.com/rust-lang-nursery/log/compare/0.4.0...0.4.1 [0.4.0]: https://github.com/rust-lang-nursery/log/compare/0.3.8...0.4.0 [release tags]: https://github.com/rust-lang-nursery/log/releases log-0.4.6/LICENSE-APACHE010066400017500001750000000251371332640070300124570ustar0000000000000000 Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. Definitions. 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See the License for the specific language governing permissions and limitations under the License. log-0.4.6/LICENSE-MIT010066400017500001750000000020571332640070300121630ustar0000000000000000Copyright (c) 2014 The Rust Project Developers Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. log-0.4.6/README.md010066400017500001750000000057241336513315500120210ustar0000000000000000log === A Rust library providing a lightweight logging *facade*. [![Build Status](https://travis-ci.org/rust-lang-nursery/log.svg?branch=master)](https://travis-ci.org/rust-lang-nursery/log) [![Build status](https://ci.appveyor.com/api/projects/status/nopdjmmjt45xcrki?svg=true)](https://ci.appveyor.com/project/alexcrichton/log) [![Latest version](https://img.shields.io/crates/v/log.svg)](https://crates.io/crates/log) [![Documentation](https://docs.rs/log/badge.svg)](https://docs.rs/log) ![License](https://img.shields.io/crates/l/log.svg) * [`log` documentation](https://docs.rs/log) A logging facade provides a single logging API that abstracts over the actual logging implementation. Libraries can use the logging API provided by this crate, and the consumer of those libraries can choose the logging implementation that is most suitable for its use case. ## Usage ## In libraries Libraries should link only to the `log` crate, and use the provided macros to log whatever information will be useful to downstream consumers: ```toml [dependencies] log = "0.4" ``` ```rust #[macro_use] extern crate log; pub fn shave_the_yak(yak: &mut Yak) { trace!("Commencing yak shaving"); loop { match find_a_razor() { Ok(razor) => { info!("Razor located: {}", razor); yak.shave(razor); break; } Err(err) => { warn!("Unable to locate a razor: {}, retrying", err); } } } } ``` If you use Rust 2018, you can use instead the following code to import the crate macros: ```rust use log::{info, trace, warn}; pub fn shave_the_yak(yak: &mut Yak) { // … } ``` ## In executables In order to produce log output executables have to use a logger implementation compatible with the facade. There are many available implementations to chose from, here are some of the most popular ones: * Simple minimal loggers: * [`env_logger`](https://docs.rs/env_logger/*/env_logger/) * [`simple_logger`](https://github.com/borntyping/rust-simple_logger) * [`simplelog`](https://github.com/drakulix/simplelog.rs) * [`pretty_env_logger`](https://docs.rs/pretty_env_logger/*/pretty_env_logger/) * [`stderrlog`](https://docs.rs/stderrlog/*/stderrlog/) * [`flexi_logger`](https://docs.rs/flexi_logger/*/flexi_logger/) * Complex configurable frameworks: * [`log4rs`](https://docs.rs/log4rs/*/log4rs/) * [`fern`](https://docs.rs/fern/*/fern/) * Adaptors for other facilities: * [`syslog`](https://docs.rs/syslog/*/syslog/) * [`slog-stdlog`](https://docs.rs/slog-stdlog/*/slog_stdlog/) * [`android_log`](https://docs.rs/android_log/*/android_log/) Executables should choose a logger implementation and initialize it early in the runtime of the program. Logger implementations will typically include a function to do this. Any log messages generated before the logger is initialized will be ignored. The executable itself may use the `log` crate to log as well. log-0.4.6/src/lib.rs010066400017500001750000001266031336513323000124370ustar0000000000000000// Copyright 2015 The Rust Project Developers. See the COPYRIGHT // file at the top-level directory of this distribution and at // http://rust-lang.org/COPYRIGHT. // // Licensed under the Apache License, Version 2.0 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. //! A lightweight logging facade. //! //! The `log` crate provides a single logging API that abstracts over the //! actual logging implementation. Libraries can use the logging API provided //! by this crate, and the consumer of those libraries can choose the logging //! implementation that is most suitable for its use case. //! //! If no logging implementation is selected, the facade falls back to a "noop" //! implementation that ignores all log messages. The overhead in this case //! is very small - just an integer load, comparison and jump. //! //! A log request consists of a _target_, a _level_, and a _body_. A target is a //! string which defaults to the module path of the location of the log request, //! though that default may be overridden. Logger implementations typically use //! the target to filter requests based on some user configuration. //! //! # Use //! //! The basic use of the log crate is through the five logging macros: [`error!`], //! [`warn!`], [`info!`], [`debug!`] and [`trace!`] //! where `error!` represents the highest-priority log messages //! and `trace!` the lowest. The log messages are filtered by configuring //! the log level to exclude messages with a lower priority. //! Each of these macros accept format strings similarly to [`println!`]. //! //! //! [`error!`]: ./macro.error.html //! [`warn!`]: ./macro.warn.html //! [`info!`]: ./macro.info.html //! [`debug!`]: ./macro.debug.html //! [`trace!`]: ./macro.trace.html //! [`println!`]: https://doc.rust-lang.org/stable/std/macro.println.html //! //! ## In libraries //! //! Libraries should link only to the `log` crate, and use the provided //! macros to log whatever information will be useful to downstream consumers. //! //! ### Examples //! //! ```rust //! # #![allow(unstable)] //! #[macro_use] //! extern crate log; //! //! # #[derive(Debug)] pub struct Yak(String); //! # impl Yak { fn shave(&mut self, _: u32) {} } //! # fn find_a_razor() -> Result { Ok(1) } //! pub fn shave_the_yak(yak: &mut Yak) { //! info!(target: "yak_events", "Commencing yak shaving for {:?}", yak); //! //! loop { //! match find_a_razor() { //! Ok(razor) => { //! info!("Razor located: {}", razor); //! yak.shave(razor); //! break; //! } //! Err(err) => { //! warn!("Unable to locate a razor: {}, retrying", err); //! } //! } //! } //! } //! # fn main() {} //! ``` //! //! ## In executables //! //! Executables should choose a logging implementation and initialize it early in the //! runtime of the program. Logging implementations will typically include a //! function to do this. Any log messages generated before //! the implementation is initialized will be ignored. //! //! The executable itself may use the `log` crate to log as well. //! //! ### Warning //! //! The logging system may only be initialized once. //! //! # Available logging implementations //! //! In order to produce log output executables have to use //! a logger implementation compatible with the facade. //! There are many available implementations to choose from, //! here are some of the most popular ones: //! //! * Simple minimal loggers: //! * [env_logger] //! * [simple_logger] //! * [simplelog] //! * [pretty_env_logger] //! * [stderrlog] //! * [flexi_logger] //! * Complex configurable frameworks: //! * [log4rs] //! * [fern] //! * Adaptors for other facilities: //! * [syslog] //! * [slog-stdlog] //! //! # Implementing a Logger //! //! Loggers implement the [`Log`] trait. Here's a very basic example that simply //! logs all messages at the [`Error`][level_link], [`Warn`][level_link] or //! [`Info`][level_link] levels to stdout: //! //! ```rust //! extern crate log; //! //! use log::{Record, Level, Metadata}; //! //! struct SimpleLogger; //! //! impl log::Log for SimpleLogger { //! fn enabled(&self, metadata: &Metadata) -> bool { //! metadata.level() <= Level::Info //! } //! //! fn log(&self, record: &Record) { //! if self.enabled(record.metadata()) { //! println!("{} - {}", record.level(), record.args()); //! } //! } //! //! fn flush(&self) {} //! } //! //! # fn main() {} //! ``` //! //! Loggers are installed by calling the [`set_logger`] function. The maximum //! log level also needs to be adjusted via the [`set_max_level`] function. The //! logging facade uses this as an optimization to improve performance of log //! messages at levels that are disabled. It's important to set it, as it //! defaults to [`Off`][filter_link], so no log messages will ever be captured! //! In the case of our example logger, we'll want to set the maximum log level //! to [`Info`][filter_link], since we ignore any [`Debug`][level_link] or //! [`Trace`][level_link] level log messages. A logging implementation should //! provide a function that wraps a call to [`set_logger`] and //! [`set_max_level`], handling initialization of the logger: //! //! ```rust //! # extern crate log; //! # use log::{Level, Metadata}; //! # struct SimpleLogger; //! # impl log::Log for SimpleLogger { //! # fn enabled(&self, _: &Metadata) -> bool { false } //! # fn log(&self, _: &log::Record) {} //! # fn flush(&self) {} //! # } //! # fn main() {} //! use log::{SetLoggerError, LevelFilter}; //! //! static LOGGER: SimpleLogger = SimpleLogger; //! //! pub fn init() -> Result<(), SetLoggerError> { //! log::set_logger(&LOGGER) //! .map(|()| log::set_max_level(LevelFilter::Info)) //! } //! ``` //! //! Implementations that adjust their configurations at runtime should take care //! to adjust the maximum log level as well. //! //! # Use with `std` //! //! `set_logger` requires you to provide a `&'static Log`, which can be hard to //! obtain if your logger depends on some runtime configuration. The //! `set_boxed_logger` function is available with the `std` Cargo feature. It is //! identical to `set_logger` except that it takes a `Box` rather than a //! `&'static Log`: //! //! ```rust //! # extern crate log; //! # use log::{Level, LevelFilter, Log, SetLoggerError, Metadata}; //! # struct SimpleLogger; //! # impl log::Log for SimpleLogger { //! # fn enabled(&self, _: &Metadata) -> bool { false } //! # fn log(&self, _: &log::Record) {} //! # fn flush(&self) {} //! # } //! # fn main() {} //! # #[cfg(feature = "std")] //! pub fn init() -> Result<(), SetLoggerError> { //! log::set_boxed_logger(Box::new(SimpleLogger)) //! .map(|()| log::set_max_level(LevelFilter::Info)) //! } //! ``` //! //! # Compile time filters //! //! Log levels can be statically disabled at compile time via Cargo features. Log invocations at //! disabled levels will be skipped and will not even be present in the resulting binary unless the //! log level is specified dynamically. This level is configured separately for release and debug //! builds. The features are: //! //! * `max_level_off` //! * `max_level_error` //! * `max_level_warn` //! * `max_level_info` //! * `max_level_debug` //! * `max_level_trace` //! * `release_max_level_off` //! * `release_max_level_error` //! * `release_max_level_warn` //! * `release_max_level_info` //! * `release_max_level_debug` //! * `release_max_level_trace` //! //! These features control the value of the `STATIC_MAX_LEVEL` constant. The logging macros check //! this value before logging a message. By default, no levels are disabled. //! //! For example, a crate can disable trace level logs in debug builds and trace, debug, and info //! level logs in release builds with the following configuration: //! //! ```toml //! [dependencies] //! log = { version = "0.4", features = ["max_level_debug", "release_max_level_warn"] } //! ``` //! # Crate Feature Flags //! //! The following crate feature flags are avaliable in addition to the filters. They are //! configured in your `Cargo.toml`. //! //! * `std` allows use of `std` crate instead of the default `core`. Enables using `std::error` and //! `set_boxed_logger` functionality. //! * `serde` enables support for serialization and deserialization of `Level` and `LevelFilter`. //! //! ```toml //! [dependencies] //! log = { version = "0.4", features = ["std", "serde"] } //! ``` //! //! # Version compatibility //! //! The 0.3 and 0.4 versions of the `log` crate are almost entirely compatible. Log messages //! made using `log` 0.3 will forward transparently to a logger implementation using `log` 0.4. Log //! messages made using `log` 0.4 will forward to a logger implementation using `log` 0.3, but the //! module path and file name information associated with the message will unfortunately be lost. //! //! [`Log`]: trait.Log.html //! [level_link]: enum.Level.html //! [filter_link]: enum.LevelFilter.html //! [`set_logger`]: fn.set_logger.html //! [`set_max_level`]: fn.set_max_level.html //! [`try_set_logger_raw`]: fn.try_set_logger_raw.html //! [`shutdown_logger_raw`]: fn.shutdown_logger_raw.html //! [env_logger]: https://docs.rs/env_logger/*/env_logger/ //! [simple_logger]: https://github.com/borntyping/rust-simple_logger //! [simplelog]: https://github.com/drakulix/simplelog.rs //! [pretty_env_logger]: https://docs.rs/pretty_env_logger/*/pretty_env_logger/ //! [stderrlog]: https://docs.rs/stderrlog/*/stderrlog/ //! [flexi_logger]: https://docs.rs/flexi_logger/*/flexi_logger/ //! [syslog]: https://docs.rs/syslog/*/syslog/ //! [slog-stdlog]: https://docs.rs/slog-stdlog/*/slog_stdlog/ //! [log4rs]: https://docs.rs/log4rs/*/log4rs/ //! [fern]: https://docs.rs/fern/*/fern/ #![doc( html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png", html_favicon_url = "https://www.rust-lang.org/favicon.ico", html_root_url = "https://docs.rs/log/0.4.6" )] #![warn(missing_docs)] #![deny(missing_debug_implementations)] #![cfg_attr(not(feature = "std"), no_std)] // When compiled for the rustc compiler itself we want to make sure that this is // an unstable crate #![cfg_attr(rustbuild, feature(staged_api, rustc_private))] #![cfg_attr(rustbuild, unstable(feature = "rustc_private", issue = "27812"))] #[cfg(not(feature = "std"))] extern crate core as std; #[macro_use] extern crate cfg_if; use std::cmp; #[cfg(feature = "std")] use std::error; use std::fmt; use std::mem; use std::str::FromStr; use std::sync::atomic::{AtomicUsize, Ordering, ATOMIC_USIZE_INIT}; #[macro_use] mod macros; mod serde; // The LOGGER static holds a pointer to the global logger. It is protected by // the STATE static which determines whether LOGGER has been initialized yet. static mut LOGGER: &'static Log = &NopLogger; static STATE: AtomicUsize = ATOMIC_USIZE_INIT; // There are three different states that we care about: the logger's // uninitialized, the logger's initializing (set_logger's been called but // LOGGER hasn't actually been set yet), or the logger's active. const UNINITIALIZED: usize = 0; const INITIALIZING: usize = 1; const INITIALIZED: usize = 2; static MAX_LOG_LEVEL_FILTER: AtomicUsize = ATOMIC_USIZE_INIT; static LOG_LEVEL_NAMES: [&'static str; 6] = ["OFF", "ERROR", "WARN", "INFO", "DEBUG", "TRACE"]; static SET_LOGGER_ERROR: &'static str = "attempted to set a logger after the logging system \ was already initialized"; static LEVEL_PARSE_ERROR: &'static str = "attempted to convert a string that doesn't match an existing log level"; /// An enum representing the available verbosity levels of the logger. /// /// Typical usage includes: checking if a certain `Level` is enabled with /// [`log_enabled!`](macro.log_enabled.html), specifying the `Level` of /// [`log!`](macro.log.html), and comparing a `Level` directly to a /// [`LevelFilter`](enum.LevelFilter.html). #[repr(usize)] #[derive(Copy, Eq, Debug, Hash)] pub enum Level { /// The "error" level. /// /// Designates very serious errors. Error = 1, // This way these line up with the discriminants for LevelFilter below /// The "warn" level. /// /// Designates hazardous situations. Warn, /// The "info" level. /// /// Designates useful information. Info, /// The "debug" level. /// /// Designates lower priority information. Debug, /// The "trace" level. /// /// Designates very low priority, often extremely verbose, information. Trace, } impl Clone for Level { #[inline] fn clone(&self) -> Level { *self } } impl PartialEq for Level { #[inline] fn eq(&self, other: &Level) -> bool { *self as usize == *other as usize } } impl PartialEq for Level { #[inline] fn eq(&self, other: &LevelFilter) -> bool { *self as usize == *other as usize } } impl PartialOrd for Level { #[inline] fn partial_cmp(&self, other: &Level) -> Option { Some(self.cmp(other)) } #[inline] fn lt(&self, other: &Level) -> bool { (*self as usize) < *other as usize } #[inline] fn le(&self, other: &Level) -> bool { *self as usize <= *other as usize } #[inline] fn gt(&self, other: &Level) -> bool { *self as usize > *other as usize } #[inline] fn ge(&self, other: &Level) -> bool { *self as usize >= *other as usize } } impl PartialOrd for Level { #[inline] fn partial_cmp(&self, other: &LevelFilter) -> Option { Some((*self as usize).cmp(&(*other as usize))) } #[inline] fn lt(&self, other: &LevelFilter) -> bool { (*self as usize) < *other as usize } #[inline] fn le(&self, other: &LevelFilter) -> bool { *self as usize <= *other as usize } #[inline] fn gt(&self, other: &LevelFilter) -> bool { *self as usize > *other as usize } #[inline] fn ge(&self, other: &LevelFilter) -> bool { *self as usize >= *other as usize } } impl Ord for Level { #[inline] fn cmp(&self, other: &Level) -> cmp::Ordering { (*self as usize).cmp(&(*other as usize)) } } fn ok_or(t: Option, e: E) -> Result { match t { Some(t) => Ok(t), None => Err(e), } } // Reimplemented here because std::ascii is not available in libcore fn eq_ignore_ascii_case(a: &str, b: &str) -> bool { fn to_ascii_uppercase(c: u8) -> u8 { if c >= b'a' && c <= b'z' { c - b'a' + b'A' } else { c } } if a.len() == b.len() { a.bytes() .zip(b.bytes()) .all(|(a, b)| to_ascii_uppercase(a) == to_ascii_uppercase(b)) } else { false } } impl FromStr for Level { type Err = ParseLevelError; fn from_str(level: &str) -> Result { ok_or( LOG_LEVEL_NAMES .iter() .position(|&name| eq_ignore_ascii_case(name, level)) .into_iter() .filter(|&idx| idx != 0) .map(|idx| Level::from_usize(idx).unwrap()) .next(), ParseLevelError(()), ) } } impl fmt::Display for Level { fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result { fmt.pad(LOG_LEVEL_NAMES[*self as usize]) } } impl Level { fn from_usize(u: usize) -> Option { match u { 1 => Some(Level::Error), 2 => Some(Level::Warn), 3 => Some(Level::Info), 4 => Some(Level::Debug), 5 => Some(Level::Trace), _ => None, } } /// Returns the most verbose logging level. #[inline] pub fn max() -> Level { Level::Trace } /// Converts the `Level` to the equivalent `LevelFilter`. #[inline] pub fn to_level_filter(&self) -> LevelFilter { LevelFilter::from_usize(*self as usize).unwrap() } } /// An enum representing the available verbosity level filters of the logger. /// /// A `LevelFilter` may be compared directly to a [`Level`]. Use this type /// to get and set the maximum log level with [`max_level()`] and [`set_max_level`]. /// /// [`Level`]: enum.Level.html /// [`max_level()`]: fn.max_level.html /// [`set_max_level`]: fn.set_max_level.html #[repr(usize)] #[derive(Copy, Eq, Debug, Hash)] pub enum LevelFilter { /// A level lower than all log levels. Off, /// Corresponds to the `Error` log level. Error, /// Corresponds to the `Warn` log level. Warn, /// Corresponds to the `Info` log level. Info, /// Corresponds to the `Debug` log level. Debug, /// Corresponds to the `Trace` log level. Trace, } // Deriving generates terrible impls of these traits impl Clone for LevelFilter { #[inline] fn clone(&self) -> LevelFilter { *self } } impl PartialEq for LevelFilter { #[inline] fn eq(&self, other: &LevelFilter) -> bool { *self as usize == *other as usize } } impl PartialEq for LevelFilter { #[inline] fn eq(&self, other: &Level) -> bool { other.eq(self) } } impl PartialOrd for LevelFilter { #[inline] fn partial_cmp(&self, other: &LevelFilter) -> Option { Some(self.cmp(other)) } #[inline] fn lt(&self, other: &LevelFilter) -> bool { (*self as usize) < *other as usize } #[inline] fn le(&self, other: &LevelFilter) -> bool { *self as usize <= *other as usize } #[inline] fn gt(&self, other: &LevelFilter) -> bool { *self as usize > *other as usize } #[inline] fn ge(&self, other: &LevelFilter) -> bool { *self as usize >= *other as usize } } impl PartialOrd for LevelFilter { #[inline] fn partial_cmp(&self, other: &Level) -> Option { Some((*self as usize).cmp(&(*other as usize))) } #[inline] fn lt(&self, other: &Level) -> bool { (*self as usize) < *other as usize } #[inline] fn le(&self, other: &Level) -> bool { *self as usize <= *other as usize } #[inline] fn gt(&self, other: &Level) -> bool { *self as usize > *other as usize } #[inline] fn ge(&self, other: &Level) -> bool { *self as usize >= *other as usize } } impl Ord for LevelFilter { #[inline] fn cmp(&self, other: &LevelFilter) -> cmp::Ordering { (*self as usize).cmp(&(*other as usize)) } } impl FromStr for LevelFilter { type Err = ParseLevelError; fn from_str(level: &str) -> Result { ok_or( LOG_LEVEL_NAMES .iter() .position(|&name| eq_ignore_ascii_case(name, level)) .map(|p| LevelFilter::from_usize(p).unwrap()), ParseLevelError(()), ) } } impl fmt::Display for LevelFilter { fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result { write!(fmt, "{}", LOG_LEVEL_NAMES[*self as usize]) } } impl LevelFilter { fn from_usize(u: usize) -> Option { match u { 0 => Some(LevelFilter::Off), 1 => Some(LevelFilter::Error), 2 => Some(LevelFilter::Warn), 3 => Some(LevelFilter::Info), 4 => Some(LevelFilter::Debug), 5 => Some(LevelFilter::Trace), _ => None, } } /// Returns the most verbose logging level filter. #[inline] pub fn max() -> LevelFilter { LevelFilter::Trace } /// Converts `self` to the equivalent `Level`. /// /// Returns `None` if `self` is `LevelFilter::Off`. #[inline] pub fn to_level(&self) -> Option { Level::from_usize(*self as usize) } } /// The "payload" of a log message. /// /// # Use /// /// `Record` structures are passed as parameters to the [`log`][method.log] /// method of the [`Log`] trait. Logger implementors manipulate these /// structures in order to display log messages. `Record`s are automatically /// created by the [`log!`] macro and so are not seen by log users. /// /// Note that the [`level()`] and [`target()`] accessors are equivalent to /// `self.metadata().level()` and `self.metadata().target()` respectively. /// These methods are provided as a convenience for users of this structure. /// /// # Example /// /// The following example shows a simple logger that displays the level, /// module path, and message of any `Record` that is passed to it. /// /// ```rust /// # extern crate log; /// struct SimpleLogger; /// /// impl log::Log for SimpleLogger { /// fn enabled(&self, metadata: &log::Metadata) -> bool { /// true /// } /// /// fn log(&self, record: &log::Record) { /// if !self.enabled(record.metadata()) { /// return; /// } /// /// println!("{}:{} -- {}", /// record.level(), /// record.target(), /// record.args()); /// } /// fn flush(&self) {} /// } /// ``` /// /// [method.log]: trait.Log.html#tymethod.log /// [`Log`]: trait.Log.html /// [`log!`]: macro.log.html /// [`level()`]: struct.Record.html#method.level /// [`target()`]: struct.Record.html#method.target #[derive(Clone, Debug)] pub struct Record<'a> { metadata: Metadata<'a>, args: fmt::Arguments<'a>, module_path: Option<&'a str>, file: Option<&'a str>, line: Option, } impl<'a> Record<'a> { /// Returns a new builder. #[inline] pub fn builder() -> RecordBuilder<'a> { RecordBuilder::new() } /// The message body. #[inline] pub fn args(&self) -> &fmt::Arguments<'a> { &self.args } /// Metadata about the log directive. #[inline] pub fn metadata(&self) -> &Metadata<'a> { &self.metadata } /// The verbosity level of the message. #[inline] pub fn level(&self) -> Level { self.metadata.level() } /// The name of the target of the directive. #[inline] pub fn target(&self) -> &'a str { self.metadata.target() } /// The module path of the message. #[inline] pub fn module_path(&self) -> Option<&'a str> { self.module_path } /// The source file containing the message. #[inline] pub fn file(&self) -> Option<&'a str> { self.file } /// The line containing the message. #[inline] pub fn line(&self) -> Option { self.line } } /// Builder for [`Record`](struct.Record.html). /// /// Typically should only be used by log library creators or for testing and "shim loggers". /// The `RecordBuilder` can set the different parameters of `Record` object, and returns /// the created object when `build` is called. /// /// # Examples /// /// /// ```rust /// use log::{Level, Record}; /// /// let record = Record::builder() /// .args(format_args!("Error!")) /// .level(Level::Error) /// .target("myApp") /// .file(Some("server.rs")) /// .line(Some(144)) /// .module_path(Some("server")) /// .build(); /// ``` /// /// Alternatively, use [`MetadataBuilder`](struct.MetadataBuilder.html): /// /// ```rust /// use log::{Record, Level, MetadataBuilder}; /// /// let error_metadata = MetadataBuilder::new() /// .target("myApp") /// .level(Level::Error) /// .build(); /// /// let record = Record::builder() /// .metadata(error_metadata) /// .args(format_args!("Error!")) /// .line(Some(433)) /// .file(Some("app.rs")) /// .module_path(Some("server")) /// .build(); /// ``` #[derive(Debug)] pub struct RecordBuilder<'a> { record: Record<'a>, } impl<'a> RecordBuilder<'a> { /// Construct new `RecordBuilder`. /// /// The default options are: /// /// - `args`: [`format_args!("")`] /// - `metadata`: [`Metadata::builder().build()`] /// - `module_path`: `None` /// - `file`: `None` /// - `line`: `None` /// /// [`format_args!("")`]: https://doc.rust-lang.org/std/macro.format_args.html /// [`Metadata::builder().build()`]: struct.MetadataBuilder.html#method.build #[inline] pub fn new() -> RecordBuilder<'a> { RecordBuilder { record: Record { args: format_args!(""), metadata: Metadata::builder().build(), module_path: None, file: None, line: None, }, } } /// Set [`args`](struct.Record.html#method.args). #[inline] pub fn args(&mut self, args: fmt::Arguments<'a>) -> &mut RecordBuilder<'a> { self.record.args = args; self } /// Set [`metadata`](struct.Record.html#method.metadata). Construct a `Metadata` object with [`MetadataBuilder`](struct.MetadataBuilder.html). #[inline] pub fn metadata(&mut self, metadata: Metadata<'a>) -> &mut RecordBuilder<'a> { self.record.metadata = metadata; self } /// Set [`Metadata::level`](struct.Metadata.html#method.level). #[inline] pub fn level(&mut self, level: Level) -> &mut RecordBuilder<'a> { self.record.metadata.level = level; self } /// Set [`Metadata::target`](struct.Metadata.html#method.target) #[inline] pub fn target(&mut self, target: &'a str) -> &mut RecordBuilder<'a> { self.record.metadata.target = target; self } /// Set [`module_path`](struct.Record.html#method.module_path) #[inline] pub fn module_path(&mut self, path: Option<&'a str>) -> &mut RecordBuilder<'a> { self.record.module_path = path; self } /// Set [`file`](struct.Record.html#method.file) #[inline] pub fn file(&mut self, file: Option<&'a str>) -> &mut RecordBuilder<'a> { self.record.file = file; self } /// Set [`line`](struct.Record.html#method.line) #[inline] pub fn line(&mut self, line: Option) -> &mut RecordBuilder<'a> { self.record.line = line; self } /// Invoke the builder and return a `Record` #[inline] pub fn build(&self) -> Record<'a> { self.record.clone() } } /// Metadata about a log message. /// /// # Use /// /// `Metadata` structs are created when users of the library use /// logging macros. /// /// They are consumed by implementations of the `Log` trait in the /// `enabled` method. /// /// `Record`s use `Metadata` to determine the log message's severity /// and target. /// /// Users should use the `log_enabled!` macro in their code to avoid /// constructing expensive log messages. /// /// # Examples /// /// ```rust /// # #[macro_use] /// # extern crate log; /// # /// use log::{Record, Level, Metadata}; /// /// struct MyLogger; /// /// impl log::Log for MyLogger { /// fn enabled(&self, metadata: &Metadata) -> bool { /// metadata.level() <= Level::Info /// } /// /// fn log(&self, record: &Record) { /// if self.enabled(record.metadata()) { /// println!("{} - {}", record.level(), record.args()); /// } /// } /// fn flush(&self) {} /// } /// /// # fn main(){} /// ``` #[derive(Clone, Eq, PartialEq, Ord, PartialOrd, Hash, Debug)] pub struct Metadata<'a> { level: Level, target: &'a str, } impl<'a> Metadata<'a> { /// Returns a new builder. #[inline] pub fn builder() -> MetadataBuilder<'a> { MetadataBuilder::new() } /// The verbosity level of the message. #[inline] pub fn level(&self) -> Level { self.level } /// The name of the target of the directive. #[inline] pub fn target(&self) -> &'a str { self.target } } /// Builder for [`Metadata`](struct.Metadata.html). /// /// Typically should only be used by log library creators or for testing and "shim loggers". /// The `MetadataBuilder` can set the different parameters of a `Metadata` object, and returns /// the created object when `build` is called. /// /// # Example /// /// ```rust /// let target = "myApp"; /// use log::{Level, MetadataBuilder}; /// let metadata = MetadataBuilder::new() /// .level(Level::Debug) /// .target(target) /// .build(); /// ``` #[derive(Eq, PartialEq, Ord, PartialOrd, Hash, Debug)] pub struct MetadataBuilder<'a> { metadata: Metadata<'a>, } impl<'a> MetadataBuilder<'a> { /// Construct a new `MetadataBuilder`. /// /// The default options are: /// /// - `level`: `Level::Info` /// - `target`: `""` #[inline] pub fn new() -> MetadataBuilder<'a> { MetadataBuilder { metadata: Metadata { level: Level::Info, target: "", }, } } /// Setter for [`level`](struct.Metadata.html#method.level). #[inline] pub fn level(&mut self, arg: Level) -> &mut MetadataBuilder<'a> { self.metadata.level = arg; self } /// Setter for [`target`](struct.Metadata.html#method.target). #[inline] pub fn target(&mut self, target: &'a str) -> &mut MetadataBuilder<'a> { self.metadata.target = target; self } /// Returns a `Metadata` object. #[inline] pub fn build(&self) -> Metadata<'a> { self.metadata.clone() } } /// A trait encapsulating the operations required of a logger. pub trait Log: Sync + Send { /// Determines if a log message with the specified metadata would be /// logged. /// /// This is used by the `log_enabled!` macro to allow callers to avoid /// expensive computation of log message arguments if the message would be /// discarded anyway. fn enabled(&self, metadata: &Metadata) -> bool; /// Logs the `Record`. /// /// Note that `enabled` is *not* necessarily called before this method. /// Implementations of `log` should perform all necessary filtering /// internally. fn log(&self, record: &Record); /// Flushes any buffered records. fn flush(&self); } // Just used as a dummy initial value for LOGGER struct NopLogger; impl Log for NopLogger { fn enabled(&self, _: &Metadata) -> bool { false } fn log(&self, _: &Record) {} fn flush(&self) {} } /// Sets the global maximum log level. /// /// Generally, this should only be called by the active logging implementation. #[inline] pub fn set_max_level(level: LevelFilter) { MAX_LOG_LEVEL_FILTER.store(level as usize, Ordering::SeqCst) } /// Returns the current maximum log level. /// /// The [`log!`], [`error!`], [`warn!`], [`info!`], [`debug!`], and [`trace!`] macros check /// this value and discard any message logged at a higher level. The maximum /// log level is set by the [`set_max_level`] function. /// /// [`log!`]: macro.log.html /// [`error!`]: macro.error.html /// [`warn!`]: macro.warn.html /// [`info!`]: macro.info.html /// [`debug!`]: macro.debug.html /// [`trace!`]: macro.trace.html /// [`set_max_level`]: fn.set_max_level.html #[inline(always)] pub fn max_level() -> LevelFilter { unsafe { mem::transmute(MAX_LOG_LEVEL_FILTER.load(Ordering::Relaxed)) } } /// Sets the global logger to a `Box`. /// /// This is a simple convenience wrapper over `set_logger`, which takes a /// `Box` rather than a `&'static Log`. See the documentation for /// [`set_logger`] for more details. /// /// Requires the `std` feature. /// /// # Errors /// /// An error is returned if a logger has already been set. /// /// [`set_logger`]: fn.set_logger.html #[cfg(feature = "std")] pub fn set_boxed_logger(logger: Box) -> Result<(), SetLoggerError> { set_logger_inner(|| unsafe { &*Box::into_raw(logger) }) } /// Sets the global logger to a `&'static Log`. /// /// This function may only be called once in the lifetime of a program. Any log /// events that occur before the call to `set_logger` completes will be ignored. /// /// This function does not typically need to be called manually. Logger /// implementations should provide an initialization method that installs the /// logger internally. /// /// # Errors /// /// An error is returned if a logger has already been set. /// /// # Examples /// /// ```rust /// # #[macro_use] /// # extern crate log; /// # /// use log::{Record, Level, Metadata, LevelFilter}; /// /// static MY_LOGGER: MyLogger = MyLogger; /// /// struct MyLogger; /// /// impl log::Log for MyLogger { /// fn enabled(&self, metadata: &Metadata) -> bool { /// metadata.level() <= Level::Info /// } /// /// fn log(&self, record: &Record) { /// if self.enabled(record.metadata()) { /// println!("{} - {}", record.level(), record.args()); /// } /// } /// fn flush(&self) {} /// } /// /// # fn main(){ /// log::set_logger(&MY_LOGGER).unwrap(); /// log::set_max_level(LevelFilter::Info); /// /// info!("hello log"); /// warn!("warning"); /// error!("oops"); /// # } /// ``` pub fn set_logger(logger: &'static Log) -> Result<(), SetLoggerError> { set_logger_inner(|| logger) } fn set_logger_inner(make_logger: F) -> Result<(), SetLoggerError> where F: FnOnce() -> &'static Log, { unsafe { match STATE.compare_and_swap(UNINITIALIZED, INITIALIZING, Ordering::SeqCst) { UNINITIALIZED => { LOGGER = make_logger(); STATE.store(INITIALIZED, Ordering::SeqCst); Ok(()) } INITIALIZING => { while STATE.load(Ordering::SeqCst) == INITIALIZING {} Err(SetLoggerError(())) } _ => Err(SetLoggerError(())), } } } /// The type returned by [`set_logger`] if [`set_logger`] has already been called. /// /// [`set_logger`]: fn.set_logger.html #[allow(missing_copy_implementations)] #[derive(Debug)] pub struct SetLoggerError(()); impl fmt::Display for SetLoggerError { fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result { fmt.write_str(SET_LOGGER_ERROR) } } // The Error trait is not available in libcore #[cfg(feature = "std")] impl error::Error for SetLoggerError { fn description(&self) -> &str { SET_LOGGER_ERROR } } /// The type returned by [`from_str`] when the string doesn't match any of the log levels. /// /// [`from_str`]: https://doc.rust-lang.org/std/str/trait.FromStr.html#tymethod.from_str #[allow(missing_copy_implementations)] #[derive(Debug, PartialEq)] pub struct ParseLevelError(()); impl fmt::Display for ParseLevelError { fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result { fmt.write_str(LEVEL_PARSE_ERROR) } } // The Error trait is not available in libcore #[cfg(feature = "std")] impl error::Error for ParseLevelError { fn description(&self) -> &str { LEVEL_PARSE_ERROR } } /// Returns a reference to the logger. /// /// If a logger has not been set, a no-op implementation is returned. pub fn logger() -> &'static Log { unsafe { if STATE.load(Ordering::SeqCst) != INITIALIZED { static NOP: NopLogger = NopLogger; &NOP } else { LOGGER } } } // WARNING: this is not part of the crate's public API and is subject to change at any time #[doc(hidden)] pub fn __private_api_log( args: fmt::Arguments, level: Level, &(target, module_path, file, line): &(&str, &str, &str, u32), ) { logger().log( &Record::builder() .args(args) .level(level) .target(target) .module_path(Some(module_path)) .file(Some(file)) .line(Some(line)) .build(), ); } // WARNING: this is not part of the crate's public API and is subject to change at any time #[doc(hidden)] pub fn __private_api_enabled(level: Level, target: &str) -> bool { logger().enabled(&Metadata::builder().level(level).target(target).build()) } /// The statically resolved maximum log level. /// /// See the crate level documentation for information on how to configure this. /// /// This value is checked by the log macros, but not by the `Log`ger returned by /// the [`logger`] function. Code that manually calls functions on that value /// should compare the level against this value. /// /// [`logger`]: fn.logger.html pub const STATIC_MAX_LEVEL: LevelFilter = MAX_LEVEL_INNER; cfg_if! { if #[cfg(all(not(debug_assertions), feature = "release_max_level_off"))] { const MAX_LEVEL_INNER: LevelFilter = LevelFilter::Off; } else if #[cfg(all(not(debug_assertions), feature = "release_max_level_error"))] { const MAX_LEVEL_INNER: LevelFilter = LevelFilter::Error; } else if #[cfg(all(not(debug_assertions), feature = "release_max_level_warn"))] { const MAX_LEVEL_INNER: LevelFilter = LevelFilter::Warn; } else if #[cfg(all(not(debug_assertions), feature = "release_max_level_info"))] { const MAX_LEVEL_INNER: LevelFilter = LevelFilter::Info; } else if #[cfg(all(not(debug_assertions), feature = "release_max_level_debug"))] { const MAX_LEVEL_INNER: LevelFilter = LevelFilter::Debug; } else if #[cfg(all(not(debug_assertions), feature = "release_max_level_trace"))] { const MAX_LEVEL_INNER: LevelFilter = LevelFilter::Trace; } else if #[cfg(feature = "max_level_off")] { const MAX_LEVEL_INNER: LevelFilter = LevelFilter::Off; } else if #[cfg(feature = "max_level_error")] { const MAX_LEVEL_INNER: LevelFilter = LevelFilter::Error; } else if #[cfg(feature = "max_level_warn")] { const MAX_LEVEL_INNER: LevelFilter = LevelFilter::Warn; } else if #[cfg(feature = "max_level_info")] { const MAX_LEVEL_INNER: LevelFilter = LevelFilter::Info; } else if #[cfg(feature = "max_level_debug")] { const MAX_LEVEL_INNER: LevelFilter = LevelFilter::Debug; } else { const MAX_LEVEL_INNER: LevelFilter = LevelFilter::Trace; } } #[cfg(test)] mod tests { extern crate std; use super::{Level, LevelFilter, ParseLevelError}; use tests::std::string::ToString; #[test] fn test_levelfilter_from_str() { let tests = [ ("off", Ok(LevelFilter::Off)), ("error", Ok(LevelFilter::Error)), ("warn", Ok(LevelFilter::Warn)), ("info", Ok(LevelFilter::Info)), ("debug", Ok(LevelFilter::Debug)), ("trace", Ok(LevelFilter::Trace)), ("OFF", Ok(LevelFilter::Off)), ("ERROR", Ok(LevelFilter::Error)), ("WARN", Ok(LevelFilter::Warn)), ("INFO", Ok(LevelFilter::Info)), ("DEBUG", Ok(LevelFilter::Debug)), ("TRACE", Ok(LevelFilter::Trace)), ("asdf", Err(ParseLevelError(()))), ]; for &(s, ref expected) in &tests { assert_eq!(expected, &s.parse()); } } #[test] fn test_level_from_str() { let tests = [ ("OFF", Err(ParseLevelError(()))), ("error", Ok(Level::Error)), ("warn", Ok(Level::Warn)), ("info", Ok(Level::Info)), ("debug", Ok(Level::Debug)), ("trace", Ok(Level::Trace)), ("ERROR", Ok(Level::Error)), ("WARN", Ok(Level::Warn)), ("INFO", Ok(Level::Info)), ("DEBUG", Ok(Level::Debug)), ("TRACE", Ok(Level::Trace)), ("asdf", Err(ParseLevelError(()))), ]; for &(s, ref expected) in &tests { assert_eq!(expected, &s.parse()); } } #[test] fn test_level_show() { assert_eq!("INFO", Level::Info.to_string()); assert_eq!("ERROR", Level::Error.to_string()); } #[test] fn test_levelfilter_show() { assert_eq!("OFF", LevelFilter::Off.to_string()); assert_eq!("ERROR", LevelFilter::Error.to_string()); } #[test] fn test_cross_cmp() { assert!(Level::Debug > LevelFilter::Error); assert!(LevelFilter::Warn < Level::Trace); assert!(LevelFilter::Off < Level::Error); } #[test] fn test_cross_eq() { assert!(Level::Error == LevelFilter::Error); assert!(LevelFilter::Off != Level::Error); assert!(Level::Trace == LevelFilter::Trace); } #[test] fn test_to_level() { assert_eq!(Some(Level::Error), LevelFilter::Error.to_level()); assert_eq!(None, LevelFilter::Off.to_level()); assert_eq!(Some(Level::Debug), LevelFilter::Debug.to_level()); } #[test] fn test_to_level_filter() { assert_eq!(LevelFilter::Error, Level::Error.to_level_filter()); assert_eq!(LevelFilter::Trace, Level::Trace.to_level_filter()); } #[test] #[cfg(feature = "std")] fn test_error_trait() { use super::SetLoggerError; use std::error::Error; let e = SetLoggerError(()); assert_eq!( e.description(), "attempted to set a logger after the logging system \ was already initialized" ); } #[test] fn test_metadata_builder() { use super::MetadataBuilder; let target = "myApp"; let metadata_test = MetadataBuilder::new() .level(Level::Debug) .target(target) .build(); assert_eq!(metadata_test.level(), Level::Debug); assert_eq!(metadata_test.target(), "myApp"); } #[test] fn test_metadata_convenience_builder() { use super::Metadata; let target = "myApp"; let metadata_test = Metadata::builder() .level(Level::Debug) .target(target) .build(); assert_eq!(metadata_test.level(), Level::Debug); assert_eq!(metadata_test.target(), "myApp"); } #[test] fn test_record_builder() { use super::{MetadataBuilder, RecordBuilder}; let target = "myApp"; let metadata = MetadataBuilder::new().target(target).build(); let fmt_args = format_args!("hello"); let record_test = RecordBuilder::new() .args(fmt_args) .metadata(metadata) .module_path(Some("foo")) .file(Some("bar")) .line(Some(30)) .build(); assert_eq!(record_test.metadata().target(), "myApp"); assert_eq!(record_test.module_path(), Some("foo")); assert_eq!(record_test.file(), Some("bar")); assert_eq!(record_test.line(), Some(30)); } #[test] fn test_record_convenience_builder() { use super::{Metadata, Record}; let target = "myApp"; let metadata = Metadata::builder().target(target).build(); let fmt_args = format_args!("hello"); let record_test = Record::builder() .args(fmt_args) .metadata(metadata) .module_path(Some("foo")) .file(Some("bar")) .line(Some(30)) .build(); assert_eq!(record_test.target(), "myApp"); assert_eq!(record_test.module_path(), Some("foo")); assert_eq!(record_test.file(), Some("bar")); assert_eq!(record_test.line(), Some(30)); } #[test] fn test_record_complete_builder() { use super::{Level, Record}; let target = "myApp"; let record_test = Record::builder() .module_path(Some("foo")) .file(Some("bar")) .line(Some(30)) .target(target) .level(Level::Error) .build(); assert_eq!(record_test.target(), "myApp"); assert_eq!(record_test.level(), Level::Error); assert_eq!(record_test.module_path(), Some("foo")); assert_eq!(record_test.file(), Some("bar")); assert_eq!(record_test.line(), Some(30)); } } log-0.4.6/src/macros.rs010066400017500001750000000153651336513315500131650ustar0000000000000000// Copyright 2014-2015 The Rust Project Developers. See the COPYRIGHT // file at the top-level directory of this distribution and at // http://rust-lang.org/COPYRIGHT. // // Licensed under the Apache License, Version 2.0 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. /// The standard logging macro. /// /// This macro will generically log with the specified `Level` and `format!` /// based argument list. /// /// # Examples /// /// ```rust /// # #[macro_use] /// # extern crate log; /// use log::Level; /// /// # fn main() { /// let data = (42, "Forty-two"); /// let private_data = "private"; /// /// log!(Level::Error, "Received errors: {}, {}", data.0, data.1); /// log!(target: "app_events", Level::Warn, "App warning: {}, {}, {}", /// data.0, data.1, private_data); /// # } /// ``` #[macro_export(local_inner_macros)] macro_rules! log { (target: $target:expr, $lvl:expr, $($arg:tt)+) => ({ let lvl = $lvl; if lvl <= $crate::STATIC_MAX_LEVEL && lvl <= $crate::max_level() { $crate::__private_api_log( __log_format_args!($($arg)+), lvl, &($target, __log_module_path!(), __log_file!(), __log_line!()), ); } }); ($lvl:expr, $($arg:tt)+) => (log!(target: __log_module_path!(), $lvl, $($arg)+)) } /// Logs a message at the error level. /// /// # Examples /// /// ```rust /// # #[macro_use] /// # extern crate log; /// # fn main() { /// let (err_info, port) = ("No connection", 22); /// /// error!("Error: {} on port {}", err_info, port); /// error!(target: "app_events", "App Error: {}, Port: {}", err_info, 22); /// # } /// ``` #[macro_export(local_inner_macros)] macro_rules! error { (target: $target:expr, $($arg:tt)*) => ( log!(target: $target, $crate::Level::Error, $($arg)*); ); ($($arg:tt)*) => ( log!($crate::Level::Error, $($arg)*); ) } /// Logs a message at the warn level. /// /// # Examples /// /// ```rust /// # #[macro_use] /// # extern crate log; /// # fn main() { /// let warn_description = "Invalid Input"; /// /// warn!("Warning! {}!", warn_description); /// warn!(target: "input_events", "App received warning: {}", warn_description); /// # } /// ``` #[macro_export(local_inner_macros)] macro_rules! warn { (target: $target:expr, $($arg:tt)*) => ( log!(target: $target, $crate::Level::Warn, $($arg)*); ); ($($arg:tt)*) => ( log!($crate::Level::Warn, $($arg)*); ) } /// Logs a message at the info level. /// /// # Examples /// /// ```rust /// # #[macro_use] /// # extern crate log; /// # fn main() { /// # struct Connection { port: u32, speed: f32 } /// let conn_info = Connection { port: 40, speed: 3.20 }; /// /// info!("Connected to port {} at {} Mb/s", conn_info.port, conn_info.speed); /// info!(target: "connection_events", "Successfull connection, port: {}, speed: {}", /// conn_info.port, conn_info.speed); /// # } /// ``` #[macro_export(local_inner_macros)] macro_rules! info { (target: $target:expr, $($arg:tt)*) => ( log!(target: $target, $crate::Level::Info, $($arg)*); ); ($($arg:tt)*) => ( log!($crate::Level::Info, $($arg)*); ) } /// Logs a message at the debug level. /// /// # Examples /// /// ```rust /// # #[macro_use] /// # extern crate log; /// # fn main() { /// # struct Position { x: f32, y: f32 } /// let pos = Position { x: 3.234, y: -1.223 }; /// /// debug!("New position: x: {}, y: {}", pos.x, pos.y); /// debug!(target: "app_events", "New position: x: {}, y: {}", pos.x, pos.y); /// # } /// ``` #[macro_export(local_inner_macros)] macro_rules! debug { (target: $target:expr, $($arg:tt)*) => ( log!(target: $target, $crate::Level::Debug, $($arg)*); ); ($($arg:tt)*) => ( log!($crate::Level::Debug, $($arg)*); ) } /// Logs a message at the trace level. /// /// # Examples /// /// ```rust /// # #[macro_use] /// # extern crate log; /// # fn main() { /// # struct Position { x: f32, y: f32 } /// let pos = Position { x: 3.234, y: -1.223 }; /// /// trace!("Position is: x: {}, y: {}", pos.x, pos.y); /// trace!(target: "app_events", "x is {} and y is {}", /// if pos.x >= 0.0 { "positive" } else { "negative" }, /// if pos.y >= 0.0 { "positive" } else { "negative" }); /// # } /// ``` #[macro_export(local_inner_macros)] macro_rules! trace { (target: $target:expr, $($arg:tt)*) => ( log!(target: $target, $crate::Level::Trace, $($arg)*); ); ($($arg:tt)*) => ( log!($crate::Level::Trace, $($arg)*); ) } /// Determines if a message logged at the specified level in that module will /// be logged. /// /// This can be used to avoid expensive computation of log message arguments if /// the message would be ignored anyway. /// /// # Examples /// /// ```rust /// # #[macro_use] /// # extern crate log; /// use log::Level::Debug; /// /// # fn foo() { /// if log_enabled!(Debug) { /// let data = expensive_call(); /// debug!("expensive debug data: {} {}", data.x, data.y); /// } /// if log_enabled!(target: "Global", Debug) { /// let data = expensive_call(); /// debug!(target: "Global", "expensive debug data: {} {}", data.x, data.y); /// } /// # } /// # struct Data { x: u32, y: u32 } /// # fn expensive_call() -> Data { Data { x: 0, y: 0 } } /// # fn main() {} /// ``` #[macro_export(local_inner_macros)] macro_rules! log_enabled { (target: $target:expr, $lvl:expr) => {{ let lvl = $lvl; lvl <= $crate::STATIC_MAX_LEVEL && lvl <= $crate::max_level() && $crate::__private_api_enabled(lvl, $target) }}; ($lvl:expr) => { log_enabled!(target: __log_module_path!(), $lvl) }; } // The log macro above cannot invoke format_args directly because it uses // local_inner_macros. A format_args invocation there would resolve to // $crate::format_args which does not exist. Instead invoke format_args here // outside of local_inner_macros so that it resolves (probably) to // core::format_args or std::format_args. Same for the several macros that // follow. // // This is a workaround until we drop support for pre-1.30 compilers. At that // point we can remove use of local_inner_macros, use $crate:: when invoking // local macros, and invoke format_args directly. #[doc(hidden)] #[macro_export] macro_rules! __log_format_args { ($($args:tt)*) => { format_args!($($args)*) }; } #[doc(hidden)] #[macro_export] macro_rules! __log_module_path { () => { module_path!() }; } #[doc(hidden)] #[macro_export] macro_rules! __log_file { () => { file!() }; } #[doc(hidden)] #[macro_export] macro_rules! __log_line { () => { line!() }; } log-0.4.6/src/serde.rs010066400017500001750000000245061332640070300127710ustar0000000000000000#![cfg(feature = "serde")] extern crate serde; use self::serde::ser::{Serialize, Serializer}; use self::serde::de::{Deserialize, DeserializeSeed, Deserializer, Visitor, EnumAccess, Unexpected, VariantAccess, Error}; use {Level, LevelFilter, LOG_LEVEL_NAMES}; use std::fmt; use std::str::{self, FromStr}; // The Deserialize impls are handwritten to be case insensitive using FromStr. impl Serialize for Level { fn serialize(&self, serializer: S) -> Result where S: Serializer, { match *self { Level::Error => serializer.serialize_unit_variant("Level", 0, "ERROR"), Level::Warn => serializer.serialize_unit_variant("Level", 1, "WARN"), Level::Info => serializer.serialize_unit_variant("Level", 2, "INFO"), Level::Debug => serializer.serialize_unit_variant("Level", 3, "DEBUG"), Level::Trace => serializer.serialize_unit_variant("Level", 4, "TRACE"), } } } impl<'de> Deserialize<'de> for Level { fn deserialize(deserializer: D) -> Result where D: Deserializer<'de>, { struct LevelIdentifier; impl<'de> Visitor<'de> for LevelIdentifier { type Value = Level; fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { formatter.write_str("log level") } fn visit_str(self, s: &str) -> Result where E: Error, { // Case insensitive. FromStr::from_str(s).map_err(|_| Error::unknown_variant(s, &LOG_LEVEL_NAMES[1..])) } fn visit_bytes(self, value: &[u8]) -> Result where E: Error, { let variant = str::from_utf8(value) .map_err(|_| Error::invalid_value(Unexpected::Bytes(value), &self))?; self.visit_str(variant) } } impl<'de> DeserializeSeed<'de> for LevelIdentifier { type Value = Level; fn deserialize(self, deserializer: D) -> Result where D: Deserializer<'de>, { deserializer.deserialize_identifier(LevelIdentifier) } } struct LevelEnum; impl<'de> Visitor<'de> for LevelEnum { type Value = Level; fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { formatter.write_str("log level") } fn visit_enum(self, value: A) -> Result where A: EnumAccess<'de>, { let (level, variant) = value.variant_seed(LevelIdentifier)?; // Every variant is a unit variant. variant.unit_variant()?; Ok(level) } } deserializer.deserialize_enum("Level", &LOG_LEVEL_NAMES[1..], LevelEnum) } } impl Serialize for LevelFilter { fn serialize(&self, serializer: S) -> Result where S: Serializer, { match *self { LevelFilter::Off => serializer.serialize_unit_variant("LevelFilter", 0, "OFF"), LevelFilter::Error => serializer.serialize_unit_variant("LevelFilter", 1, "ERROR"), LevelFilter::Warn => serializer.serialize_unit_variant("LevelFilter", 2, "WARN"), LevelFilter::Info => serializer.serialize_unit_variant("LevelFilter", 3, "INFO"), LevelFilter::Debug => serializer.serialize_unit_variant("LevelFilter", 4, "DEBUG"), LevelFilter::Trace => serializer.serialize_unit_variant("LevelFilter", 5, "TRACE"), } } } impl<'de> Deserialize<'de> for LevelFilter { fn deserialize(deserializer: D) -> Result where D: Deserializer<'de>, { struct LevelFilterIdentifier; impl<'de> Visitor<'de> for LevelFilterIdentifier { type Value = LevelFilter; fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { formatter.write_str("log level filter") } fn visit_str(self, s: &str) -> Result where E: Error, { // Case insensitive. FromStr::from_str(s).map_err(|_| Error::unknown_variant(s, &LOG_LEVEL_NAMES)) } fn visit_bytes(self, value: &[u8]) -> Result where E: Error, { let variant = str::from_utf8(value) .map_err(|_| Error::invalid_value(Unexpected::Bytes(value), &self))?; self.visit_str(variant) } } impl<'de> DeserializeSeed<'de> for LevelFilterIdentifier { type Value = LevelFilter; fn deserialize(self, deserializer: D) -> Result where D: Deserializer<'de>, { deserializer.deserialize_identifier(LevelFilterIdentifier) } } struct LevelFilterEnum; impl<'de> Visitor<'de> for LevelFilterEnum { type Value = LevelFilter; fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { formatter.write_str("log level filter") } fn visit_enum(self, value: A) -> Result where A: EnumAccess<'de>, { let (level_filter, variant) = value.variant_seed(LevelFilterIdentifier)?; // Every variant is a unit variant. variant.unit_variant()?; Ok(level_filter) } } deserializer.deserialize_enum("LevelFilter", &LOG_LEVEL_NAMES, LevelFilterEnum) } } #[cfg(test)] mod tests { extern crate serde_test; use self::serde_test::{assert_de_tokens, assert_de_tokens_error, assert_tokens, Token}; use {Level, LevelFilter}; fn level_token(variant: &'static str) -> Token { Token::UnitVariant { name: "Level", variant: variant, } } fn level_bytes_tokens(variant: &'static [u8]) -> [Token; 3] { [ Token::Enum { name: "Level" }, Token::Bytes(variant), Token::Unit, ] } fn level_filter_token(variant: &'static str) -> Token { Token::UnitVariant { name: "LevelFilter", variant: variant, } } fn level_filter_bytes_tokens(variant: &'static [u8]) -> [Token; 3] { [ Token::Enum { name: "LevelFilter", }, Token::Bytes(variant), Token::Unit, ] } #[test] fn test_level_ser_de() { let cases = [ (Level::Error, [level_token("ERROR")]), (Level::Warn, [level_token("WARN")]), (Level::Info, [level_token("INFO")]), (Level::Debug, [level_token("DEBUG")]), (Level::Trace, [level_token("TRACE")]), ]; for &(s, expected) in &cases { assert_tokens(&s, &expected); } } #[test] fn test_level_case_insensitive() { let cases = [ (Level::Error, [level_token("error")]), (Level::Warn, [level_token("warn")]), (Level::Info, [level_token("info")]), (Level::Debug, [level_token("debug")]), (Level::Trace, [level_token("trace")]), ]; for &(s, expected) in &cases { assert_de_tokens(&s, &expected); } } #[test] fn test_level_de_bytes() { let cases = [ (Level::Error, level_bytes_tokens(b"ERROR")), (Level::Warn, level_bytes_tokens(b"WARN")), (Level::Info, level_bytes_tokens(b"INFO")), (Level::Debug, level_bytes_tokens(b"DEBUG")), (Level::Trace, level_bytes_tokens(b"TRACE")), ]; for &(value, tokens) in &cases { assert_de_tokens(&value, &tokens); } } #[test] fn test_level_de_error() { let msg = "unknown variant `errorx`, expected one of \ `ERROR`, `WARN`, `INFO`, `DEBUG`, `TRACE`"; assert_de_tokens_error::(&[level_token("errorx")], msg); } #[test] fn test_level_filter_ser_de() { let cases = [ (LevelFilter::Off, [level_filter_token("OFF")]), (LevelFilter::Error, [level_filter_token("ERROR")]), (LevelFilter::Warn, [level_filter_token("WARN")]), (LevelFilter::Info, [level_filter_token("INFO")]), (LevelFilter::Debug, [level_filter_token("DEBUG")]), (LevelFilter::Trace, [level_filter_token("TRACE")]), ]; for &(s, expected) in &cases { assert_tokens(&s, &expected); } } #[test] fn test_level_filter_case_insensitive() { let cases = [ (LevelFilter::Off, [level_filter_token("off")]), (LevelFilter::Error, [level_filter_token("error")]), (LevelFilter::Warn, [level_filter_token("warn")]), (LevelFilter::Info, [level_filter_token("info")]), (LevelFilter::Debug, [level_filter_token("debug")]), (LevelFilter::Trace, [level_filter_token("trace")]), ]; for &(s, expected) in &cases { assert_de_tokens(&s, &expected); } } #[test] fn test_level_filter_de_bytes() { let cases = [ (LevelFilter::Off, level_filter_bytes_tokens(b"OFF")), (LevelFilter::Error, level_filter_bytes_tokens(b"ERROR")), (LevelFilter::Warn, level_filter_bytes_tokens(b"WARN")), (LevelFilter::Info, level_filter_bytes_tokens(b"INFO")), (LevelFilter::Debug, level_filter_bytes_tokens(b"DEBUG")), (LevelFilter::Trace, level_filter_bytes_tokens(b"TRACE")), ]; for &(value, tokens) in &cases { assert_de_tokens(&value, &tokens); } } #[test] fn test_level_filter_de_error() { let msg = "unknown variant `errorx`, expected one of \ `OFF`, `ERROR`, `WARN`, `INFO`, `DEBUG`, `TRACE`"; assert_de_tokens_error::(&[level_filter_token("errorx")], msg); } } log-0.4.6/tests/filters.rs010066400017500001750000000030721332640070300137050ustar0000000000000000#[macro_use] extern crate log; use std::sync::{Arc, Mutex}; use log::{Level, LevelFilter, Log, Record, Metadata}; #[cfg(feature = "std")] use log::set_boxed_logger; #[cfg(not(feature = "std"))] fn set_boxed_logger(logger: Box) -> Result<(), log::SetLoggerError> { log::set_logger(unsafe { &*Box::into_raw(logger) }) } struct State { last_log: Mutex>, } struct Logger(Arc); impl Log for Logger { fn enabled(&self, _: &Metadata) -> bool { true } fn log(&self, record: &Record) { *self.0.last_log.lock().unwrap() = Some(record.level()); } fn flush(&self) {} } fn main() { let me = Arc::new(State { last_log: Mutex::new(None) }); let a = me.clone(); set_boxed_logger(Box::new(Logger(me))).unwrap(); test(&a, LevelFilter::Off); test(&a, LevelFilter::Error); test(&a, LevelFilter::Warn); test(&a, LevelFilter::Info); test(&a, LevelFilter::Debug); test(&a, LevelFilter::Trace); } fn test(a: &State, filter: LevelFilter) { log::set_max_level(filter); error!(""); last(&a, t(Level::Error, filter)); warn!(""); last(&a, t(Level::Warn, filter)); info!(""); last(&a, t(Level::Info, filter)); debug!(""); last(&a, t(Level::Debug, filter)); trace!(""); last(&a, t(Level::Trace, filter)); fn t(lvl: Level, filter: LevelFilter) -> Option { if lvl <= filter { Some(lvl) } else { None } } } fn last(state: &State, expected: Option) { let lvl = state.last_log.lock().unwrap().take(); assert_eq!(lvl, expected); } log-0.4.6/.cargo_vcs_info.json0000644000000001120000000000000116550ustar00{ "git": { "sha1": "1a9a8275f5d84d50b756437524da5ff8273ef99b" } }