PerCederberg.Grammatica.Runtime
Class NFAMatcher

System.Object
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   +--TokenMatcher
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         +--NFAMatcher

internal class NFAMatcher

extends TokenMatcher

A token pattern matcher using a NFA for both string and regular expression tokens. This class has limited support for regular expressions and must be complemented with another matcher providing full regular expression support. Internally it uses a NFA to provide high performance and low memory usage.

NFAMatcher

public NFAMatcher( bool ignoreCase );

Creates a new NFA token matcher.

Parameters:

ignoreCase - the character case ignore flag

AddPattern

public override void AddPattern( TokenPattern pattern );

Adds a 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