1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155
// 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 <LICENSE-APACHE or // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license // <LICENSE-MIT or http://opensource.org/licenses/MIT>, 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 `LogLevel` and `format!` /// based argument list. /// /// The `max_level_*` features can be used to statically disable logging at /// various levels. #[macro_export] macro_rules! log { (target: $target:expr, $lvl:expr, $($arg:tt)+) => ({ static _LOC: $crate::LogLocation = $crate::LogLocation { __line: line!(), __file: file!(), __module_path: module_path!(), }; let lvl = $lvl; if lvl <= $crate::__static_max_level() && lvl <= $crate::max_log_level() { $crate::__log(lvl, $target, &_LOC, format_args!($($arg)+)) } }); ($lvl:expr, $($arg:tt)+) => (log!(target: module_path!(), $lvl, $($arg)+)) } /// Logs a message at the error level. /// /// Logging at this level is disabled if the `max_level_off` feature is present. #[macro_export] macro_rules! error { (target: $target:expr, $($arg:tt)*) => ( log!(target: $target, $crate::LogLevel::Error, $($arg)*); ); ($($arg:tt)*) => ( log!($crate::LogLevel::Error, $($arg)*); ) } /// Logs a message at the warn level. /// /// Logging at this level is disabled if any of the following features are /// present: `max_level_off` or `max_level_error`. /// /// When building in release mode (i.e., without the `debug_assertions` option), /// logging at this level is also disabled if any of the following features are /// present: `release_max_level_off` or `max_level_error`. #[macro_export] macro_rules! warn { (target: $target:expr, $($arg:tt)*) => ( log!(target: $target, $crate::LogLevel::Warn, $($arg)*); ); ($($arg:tt)*) => ( log!($crate::LogLevel::Warn, $($arg)*); ) } /// Logs a message at the info level. /// /// Logging at this level is disabled if any of the following features are /// present: `max_level_off`, `max_level_error`, or `max_level_warn`. /// /// When building in release mode (i.e., without the `debug_assertions` option), /// logging at this level is also disabled if any of the following features are /// present: `release_max_level_off`, `release_max_level_error`, or /// `release_max_level_warn`. #[macro_export] macro_rules! info { (target: $target:expr, $($arg:tt)*) => ( log!(target: $target, $crate::LogLevel::Info, $($arg)*); ); ($($arg:tt)*) => ( log!($crate::LogLevel::Info, $($arg)*); ) } /// Logs a message at the debug level. /// /// Logging at this level is disabled if any of the following features are /// present: `max_level_off`, `max_level_error`, `max_level_warn`, or /// `max_level_info`. /// /// When building in release mode (i.e., without the `debug_assertions` option), /// logging at this level is also disabled if any of the following features are /// present: `release_max_level_off`, `release_max_level_error`, /// `release_max_level_warn`, or `release_max_level_info`. #[macro_export] macro_rules! debug { (target: $target:expr, $($arg:tt)*) => ( log!(target: $target, $crate::LogLevel::Debug, $($arg)*); ); ($($arg:tt)*) => ( log!($crate::LogLevel::Debug, $($arg)*); ) } /// Logs a message at the trace level. /// /// Logging at this level is disabled if any of the following features are /// present: `max_level_off`, `max_level_error`, `max_level_warn`, /// `max_level_info`, or `max_level_debug`. /// /// When building in release mode (i.e., without the `debug_assertions` option), /// logging at this level is also disabled if any of the following features are /// present: `release_max_level_off`, `release_max_level_error`, /// `release_max_level_warn`, `release_max_level_info`, or /// `release_max_level_debug`. #[macro_export] macro_rules! trace { (target: $target:expr, $($arg:tt)*) => ( log!(target: $target, $crate::LogLevel::Trace, $($arg)*); ); ($($arg:tt)*) => ( log!($crate::LogLevel::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::LogLevel::Debug; /// /// # fn foo() { /// if log_enabled!(Debug) { /// let data = expensive_call(); /// debug!("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] macro_rules! log_enabled { (target: $target:expr, $lvl:expr) => ({ let lvl = $lvl; lvl <= $crate::__static_max_level() && lvl <= $crate::max_log_level() && $crate::__enabled(lvl, $target) }); ($lvl:expr) => (log_enabled!(target: module_path!(), $lvl)) }