Crate log_parser_kma 

Grammar rules

Here pest grammar rules are described.

time

This rule matches a time in the format HH:MM:SS.

Structure: hour:minsec:minsec

time = { hour ~ ":" ~ minsec ~ ":" ~ minsec }

Components:

• hour: Matches an hour value from 00 to 23.

hour = { "0" ~ ASCII_DIGIT | "1" ~ ASCII_DIGIT | "2" ~ '0'..'3' }

• minsec: Matches minutes or seconds from 00 to 59.

minsec = { '0'..'5' ~ ASCII_DIGIT }

date

This rule matches a date in the format YYYY-MM-DD.

Structure: YYYY-month-day

date = { ASCII_DIGIT{4} ~ "-" ~ month ~ "-" ~ day }

Components:

• ASCII_DIGIT{4}: Matches a four-digit year (e.g., 2023).

• month: Matches month values from 01 to 12.

month = { "0" ~ ASCII_NONZERO_DIGIT | "1" ~ '0'..'2' }

• day: Matches a two-digit day.

day = { "0" ~ ASCII_NONZERO_DIGIT | '1'..'2' ~ ASCII_DIGIT | "3" ~ '0'..'1' }

datetime

Combines a date and a time to represent a full timestamp.

datetime = { date ~ " " ~ time }

loglevel

Matches specific log levels in log entries. 3 different values are supported: INFO, WARNING, ERROR.

loglevel = { "INFO" | "WARNING" | "ERROR" }

message

Captures message part of the log line. Matches any sequence of characters until a newline, ensuring the content is part of a single line.

message = { (!NEWLINE ~ ANY)+ }

logline

Represents a full log entry, combining all previous rules. Matches a complete log line that starts with a timestamp, followed by a log level, and ends with a log message.

Structure: datetime loglevel message

logline = { datetime ~ " " ~ loglevel ~ " " ~ message }

Example log line:

2024-11-06 18:46:37 WARNING A warning log line example

Structs

LogLine

LogParser

Enums

LogLevel

LogParseError

Rule

Traits

Parser

A trait with a single method that parses strings.