ix.util.match
Class SimpleMatcher

java.lang.Object
  |
  +--ix.util.match.SimpleMatcher

public final class SimpleMatcher

extends java.lang.Object

A simple pattern-matcher.

Field Summary

static MatchEnv	emptyEnv emptyEnv is used to return non-null without allocating an env.
static Symbol	REST

Constructor Summary

SimpleMatcher()

Method Summary

static MatchEnv	match(java.lang.Object pat, java.lang.Object dat) Match tries to match a pattern against an object.
static MatchEnv	match(java.lang.Object pat, java.lang.Object dat, MatchEnv env)
static MatchEnv	mustMatch(java.lang.Object pat, java.lang.Object dat)
static MatchEnv	mustMatch(java.lang.Object pat, java.lang.Object dat, MatchEnv env)

Methods inherited from class java.lang.Object

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

Field Detail

emptyEnv

public static final MatchEnv emptyEnv

emptyEnv is used to return non-null without allocating an env.

REST

public static final Symbol REST

Constructor Detail

SimpleMatcher

public SimpleMatcher()

Method Detail

mustMatch

public static final MatchEnv mustMatch(java.lang.Object pat,
                                       java.lang.Object dat)

mustMatch

public static final MatchEnv mustMatch(java.lang.Object pat,
                                       java.lang.Object dat,
                                       MatchEnv env)

match

public static final MatchEnv match(java.lang.Object pat,
                                   java.lang.Object dat)

Match tries to match a pattern against an object.

Only the pattern can contain variables. If a variable appears more than once in a pattern, there's no attempt to check that it matches the same thing each time.

For now, numbers are compared as objects, not by comparing their numeric values.

Returns:

a MatchEnv or null.

See Also:

MatchEnv, ItemVar

match

public static final MatchEnv match(java.lang.Object pat,
                                   java.lang.Object dat,
                                   MatchEnv env)