Struct Logger 

pub struct Logger { /* private fields */ }

A simple logger that writes log entries to a specified file. Each log entry includes a log level, timestamp, source filename, line number, and message. The logger supports four log levels: FATAL, WARNING, INFO, and DEBUG.

Example

 use judger::Logger;
 use std::fmt::Arguments;
 use judger::LogLevel;
 let mut logger = Logger::new("judger.log").expect("Failed to create logger");
 logger.write(LogLevel::Info, file!(), line!(), format_args!("This is an info message")).expect("Failed to write log");

Errors

The new method returns an io::Error if the log file cannot be created or opened. The write method returns an io::Error if writing to the log file fails or if an invalid log level is provided.

Implementations

impl Logger

pub fn new(filename: &str) -> Result<Logger>

Creates a new logger that writes to the specified file. If the file does not exist, it will be created. If it exists, logs will be appended.

Errors

Returns an io::Error if the file cannot be created or opened.

Example

 use judger::Logger;
 let logger = Logger::new("judger.log").expect("Failed to create logger");

Arguments

• filename - The path to the log file.

Returns

A Result containing the Logger or an io::Error.

pub fn write( &mut self, level: LogLevel, source_filename: &str, line: u32, args: Arguments<'_>, ) -> Result<()>

Writes a log entry to the log file with the specified level, source filename, line number, and message.

Errors

Returns an io::Error if writing to the log file fails or if an invalid log level is provided.

Example

 use judger::Logger;
 use std::fmt::Arguments;
 use judger::LogLevel;
 let mut logger = Logger::new("judger.log").expect("Failed to create logger");
 logger.write(LogLevel::Info, file!(), line!(), format_args!("This is an info message")).expect("Failed to write log");

Arguments

• level - The log level of the entry.
• source_filename - The source filename where the log entry is generated.
• line - The line number in the source file.
• args - The formatted message to log.

Returns

A Result indicating success or containing an io::Error.

Trait Implementations

impl Drop for Logger

fn drop(&mut self)

Executes the destructor for this type.