Mojo struct

Logger

struct Logger[level: Level = DEFAULT_LEVEL]

A logger that outputs messages at or above a specified severity level.

Parameters

• ​level (Level): The minimum severity level for messages to be logged.

Implemented traits

AnyType, Copyable, ImplicitlyCopyable, ImplicitlyDestructible, Movable

comptime members

__copyinit__is_trivial

comptime __copyinit__is_trivial = False

__del__is_trivial

comptime __del__is_trivial = False

__moveinit__is_trivial

comptime __moveinit__is_trivial = False

Methods

__init__

__init__(out self, fd: FileDescriptor = stdout, *, prefix: String = "", source_location: Bool = False)

Initializes a new Logger.

Args:

• ​fd (FileDescriptor): The file descriptor to write log messages to (defaults to stdout).
• ​prefix (String): The prefix to prepend to each log message (defaults to an empty string).
• ​source_location (Bool): Whether to include the source location in the log message (defaults to False).

trace

trace[*Ts: Writable](self, *values: *Ts, *, sep: StringSlice[StaticConstantOrigin] = " ", end: StringSlice[StaticConstantOrigin] = "\n", location: Optional[SourceLocation] = None)

Logs a trace message.

Parameters:

• ​*Ts (Writable): The types of values to log.

Args:

• ​*values (*Ts): The values to log.
• ​sep (StringSlice): The separator to use between values (defaults to a space).
• ​end (StringSlice): The string to append to the end of the message (defaults to a newline).
• ​location (Optional): The location of the error (defaults to call_location).

debug

debug[*Ts: Writable](self, *values: *Ts, *, sep: StringSlice[StaticConstantOrigin] = " ", end: StringSlice[StaticConstantOrigin] = "\n", location: Optional[SourceLocation] = None)

Logs a debug message.

Parameters:

• ​*Ts (Writable): The types of values to log.

Args:

• ​*values (*Ts): The values to log.
• ​sep (StringSlice): The separator to use between values (defaults to a space).
• ​end (StringSlice): The string to append to the end of the message (defaults to a newline).
• ​location (Optional): The location of the error (defaults to call_location).

info

info[*Ts: Writable](self, *values: *Ts, *, sep: StringSlice[StaticConstantOrigin] = " ", end: StringSlice[StaticConstantOrigin] = "\n", location: Optional[SourceLocation] = None)

Logs an info message.

Parameters:

• ​*Ts (Writable): The types of values to log.

Args:

• ​*values (*Ts): The values to log.
• ​sep (StringSlice): The separator to use between values (defaults to a space).
• ​end (StringSlice): The string to append to the end of the message (defaults to a newline).
• ​location (Optional): The location of the error (defaults to call_location).

warning

warning[*Ts: Writable](self, *values: *Ts, *, sep: StringSlice[StaticConstantOrigin] = " ", end: StringSlice[StaticConstantOrigin] = "\n", location: Optional[SourceLocation] = None)

Logs a warning message.

Parameters:

• ​*Ts (Writable): The types of values to log.

Args:

• ​*values (*Ts): The values to log.
• ​sep (StringSlice): The separator to use between values (defaults to a space).
• ​end (StringSlice): The string to append to the end of the message (defaults to a newline).
• ​location (Optional): The location of the error (defaults to call_location).

error

error[*Ts: Writable](self, *values: *Ts, *, sep: StringSlice[StaticConstantOrigin] = " ", end: StringSlice[StaticConstantOrigin] = "\n", location: Optional[SourceLocation] = None)

Logs an error message.

Parameters:

• ​*Ts (Writable): The types of values to log.

Args:

• ​*values (*Ts): The values to log.
• ​sep (StringSlice): The separator to use between values (defaults to a space).
• ​end (StringSlice): The string to append to the end of the message (defaults to a newline).
• ​location (Optional): The location of the error (defaults to call_location).

critical

critical[*Ts: Writable](self, *values: *Ts, *, sep: StringSlice[StaticConstantOrigin] = " ", end: StringSlice[StaticConstantOrigin] = "\n", location: Optional[SourceLocation] = None)

Logs a critical message and aborts execution.

Parameters:

• ​*Ts (Writable): The types of values to log.

Args:

• ​*values (*Ts): The values to log.
• ​sep (StringSlice): The separator to use between values (defaults to a space).
• ​end (StringSlice): The string to append to the end of the message (defaults to a newline).
• ​location (Optional): The location of the error (defaults to call_location).

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