kawa.lang
Class Pattern

java.lang.Object
  kawa.lang.Pattern

All Implemented Interfaces:

Printable

Direct Known Subclasses:

AnyPat, EqualPat, ListPat, ListRepeatPat, PairPat, SyntaxPattern, VarListPat

public abstract class Pattern
extends java.lang.Object
implements Printable

A Pattern is used to match against objects. E.g. it can be used to match against macro arguments.

Field Summary

static Method	matchPatternMethod
static ClassType	typePattern

Constructor Summary

Pattern()

Method Summary

java.lang.Object[]	match(java.lang.Object obj) Match this Pattern against an object.
abstract boolean	match(java.lang.Object obj, java.lang.Object[] vars, int start_vars) Match this Pattern against an Object.
abstract int	varCount()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface gnu.text.Printable

print

Field Detail

typePattern

public static ClassType typePattern

matchPatternMethod

public static final Method matchPatternMethod

Constructor Detail

Pattern

public Pattern()

Method Detail

match

public java.lang.Object[] match(java.lang.Object obj)

Match this Pattern against an object.

Parameters:

obj - object to match against this pattern

Returns:

null on failure, or an array of bound pattern variables.

match

public abstract boolean match(java.lang.Object obj,
                              java.lang.Object[] vars,
                              int start_vars)

Match this Pattern against an Object.

Parameters:

obj - the Object to match against

vars - the "pattern variable" values extracted from obj go here

start_vars - where in vars to strt putting the varCount() values

Returns:

true iff the match succeeded.

varCount

public abstract int varCount()