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- //
- // LoggingPrint.swift
- //
- import Foundation
- /**
- Prints the filename, function name, line number and textual representation of `object` and a newline character into
- the standard output if the build setting for "Active Complilation Conditions" (SWIFT_ACTIVE_COMPILATION_CONDITIONS) defines `DEBUG`.
- The current thread is a prefix on the output. <UI> for the main thread, <BG> for anything else.
- Only the first parameter needs to be passed to this funtion.
- The textual representation is obtained from the `object` using `String(reflecting:)` which works for _any_ type.
- To provide a custom format for the output make your object conform to `CustomDebugStringConvertible` and provide your format in
- the `debugDescription` parameter.
- :param: object The object whose textual representation will be printed. If this is an expression, it is lazily evaluated.
- :param: file The name of the file, defaults to the current file without the ".swift" extension.
- :param: function The name of the function, defaults to the function within which the call is made.
- :param: line The line number, defaults to the line number within the file that the call is made.
- */
- func loggingPrint<T>(_ object: @autoclosure () -> T, _ file: String = #file, _ function: String = #function, _ line: Int = #line) {
- #if DEBUG
- let value = object()
- let fileURL = NSURL(string: file)?.lastPathComponent ?? "Unknown file"
- let queue = Thread.isMainThread ? "UI" : "BG"
- print("<\(queue)> \(fileURL) \(function)[\(line)]: " + String(reflecting: value))
- #endif
- }
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