PerCederberg.Grammatica.Parser.RE
Class CombineElement
ICloneable
|
+--Element
|
+--CombineElement
in CombineElement.cs
- class CombineElement
- extends Element
A regular expression combination element. This element matches
two consecutive elements.
Method Summary |
override object |
Clone()
Creates a copy of this element. |
override int |
Match( Matcher m, string str, int start, int skip )
Returns the length of a matching string starting at the
specified position. |
override void |
PrintTo( TextWriter output, string indent )
Prints this element to the specified output stream. |
CombineElement
public CombineElement( Element first, Element second );
- Creates a new combine element.
- Parameters:
first
- the first element
second
- the second element
Clone
public override object Clone();
- Creates a copy of this element. The copy will be an
instance of the same class matching the same strings.
Copies of elements are necessary to allow elements to cache
intermediate results while matching strings without
interfering with other threads.
- Returns:
- a copy of this element
Match
public override int Match( Matcher m, string str, int start, int skip );
- Returns the length of a matching string starting at the
specified position. The number of matches to skip can also be
specified, but numbers higher than zero (0) cause a failed
match for any element that doesn't attempt to combine other
elements.
- Parameters:
m
- the matcher being used
str
- the string to match
start
- the starting position
skip
- the number of matches to skip
- Returns:
- the length of the longest matching string, or
-1 if no match was found
PrintTo
public override void PrintTo( TextWriter output, string indent );
- Prints this element to the specified output stream.
- Parameters:
output
- the output stream to use
indent
- the current indentation