lex2.matcher

Components of matcher implementations.

Classes

BaseMatcher	Abstract base class partially implementing IMatcher.
ReMatcher	Implementation of IMatcher using Python's builtin re module.

class lex2.matcher.BaseMatcher

Bases: IMatcher, ABC

Abstract base class partially implementing IMatcher.

abstract __init__()

get_uid()

Gets the unique identifier (UID) of the matcher implementation.

Return type

str

class lex2.matcher.ReMatcher

Bases: BaseMatcher

Implementation of IMatcher using Python’s builtin re module.

__init__()

compile_pattern(regex)

Compiles regex pattern to implementation-specific regex matcher object.

Parameters

regex (str) – Regular expression to compile.

match(ts, token)

Looks for a pattern match and sets it in the provided token object.

Parameters

• ts (ITextstream) – Textstream object managed by the lexer object.

• token (Token) – Used to set the match data in the token.

Returns

True in case of a match.

Return type

bool