PerCederberg.Grammatica.Runtime
Class NFACharRangeTransition

System.Object
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   +--NFATransition
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         +--NFACharRangeTransition

internal class NFACharRangeTransition

extends NFATransition

A character range match transition. Used for user-defined character sets in regular expressions.

ignoreCase

protected bool ignoreCase;

The case-insensitive match flag.

inverse

protected bool inverse;

The inverse match flag.

NFACharRangeTransition

public NFACharRangeTransition( bool inverse, bool ignoreCase, NFAState state );

Creates a new character range transition.

Parameters:

inverse - the inverse match flag

ignoreCase - the case-insensitive match flag

state - the target state

AddCharacter

public void AddCharacter( char c );

Adds a single character to this character set.

Parameters:

c - the character to add

AddRange

public void AddRange( char min, char max );

Adds a character range to this character set.

Parameters:

min - the minimum character value

max - the maximum character value

Copy

public override NFATransition Copy( NFAState state );

Creates a copy of this transition but with another target state.

Parameters:

state - the new target state

Returns:

an identical copy of this transition

IsAscii

public override bool IsAscii();

Checks if this transition only matches ASCII characters. I.e. characters with numeric values between 0 and 127.

Returns:

true if this transition only matches ASCII, or false otherwise

Match

public override bool Match( char ch );

Checks if the specified character matches the transition.

Parameters:

ch - the character to check

Returns:

true if the character matches, or false otherwise