Crate lua_pattern

lua-pattern

Parser for Lua patterns and conversion to regular expressions.

This crate provides a basic parser for Lua patterns, and, with the to-regex feature enabled, conversion to standard regular expressions as usable by the regex or fancy-regex crate.

Usage

• Lua patterns can be parsed to a tree with parse.
• Parsed patterns can be converted to regex strings with try_to_regex.

For example:

use lua_pattern::{Class, PatternObject};

let tree = lua_pattern::parse("%l").unwrap();
assert_eq!(tree, [PatternObject::Class(Class::Lowercase)]);
#[cfg(feature = "to-regex")]
assert_eq!(
    lua_pattern::try_to_regex(&tree, false, false).unwrap(),
    "[a-z]"
);

Features

• to-regex — Provide try_to_regex for converting a parsed pattern to a regex
• docs — Meant to be enabled when building docs

Enums

Class

A character class, matching any character contained in the class.

Error

The crate’s main error type.

PatternObject

A single object of a Lua pattern.

Quantifier

A quantifier, specifying the amount of times the leading PatternObject can occur.

SetPatternObject

An entry of a set.

ToRegexErrorto-regex

The error type for errors that can occur during conversion to regular expressions. See try_to_regex for more information.

Token

A token as used by the internal lexer. Exposed to the public API for use in Errors.

Functions

parse

Parse the given input string as a Lua pattern.

try_to_regexto-regex

Try to convert a parsed Lua pattern into a regular expression string.

Type Aliases

Pattern

A list of PatternObjects, representing an entire Lua pattern.

Result

The default result type. The error variant is Error.