PerCederberg.Grammatica.Runtime
Class RegExpMatcher

System.Object
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   +--TokenMatcher
         |
         +--RegExpMatcher

internal class RegExpMatcher

extends TokenMatcher

A token pattern matcher for complex regular expressions. This class only supports regular expression tokens and must be complemented with another matcher for string tokens. Internally it uses the Grammatica RE package for high performance or the native java.util.regex package for maximum compatibility.

RegExpMatcher

public RegExpMatcher( bool ignoreCase );

Creates a new regular expression token matcher.

Parameters:

ignoreCase - the character case ignore flag

AddPattern

public override void AddPattern( TokenPattern pattern );

Adds a regular expression token pattern to this matcher.

Parameters:

pattern - the pattern to add

Throws:

Exception - if the pattern couldn't be added to the matcher

Match

public override void Match( ReaderBuffer buffer, TokenMatch match );

Searches for matching token patterns at the start of the input stream. If a match is found, the token match object is updated.

Parameters:

buffer - the input buffer to check

match - the token match to update

Throws:

IOException - if an I/O error occurred