kawa.lang

Class ListPat

java.lang.Object

kawa.lang.Pattern

kawa.lang.ListPat

All Implemented Interfaces:

gnu.kawa.format.Printable

public class ListPat
extends Pattern

Match a list whose length in in the range [min_length..max_length].

Field Summary

Fields inherited from class kawa.lang.Pattern

matchPatternMethod, typePattern

Constructor Summary

Constructors

Constructor and Description
ListPat(int len)
ListPat(int min, int max)
ListPat(int min, int max, java.lang.Object default_val)

Method Summary

Modifier and Type	Method and Description
static java.lang.Object[]	match(int min, int max, java.lang.Object default_val, java.lang.Object obj) Succeeds if obj is a list of length [min..max].
static boolean	match(int min, int max, java.lang.Object default_val, java.lang.Object obj, java.lang.Object[] vars, int start_vars)
boolean	match(java.lang.Object obj, java.lang.Object[] vars, int start_vars) Succeeds if obj is a list of length [min_length..max_length].
void	print(Consumer out)
int	varCount()

Methods inherited from class kawa.lang.Pattern

match

Methods inherited from class java.lang.Object

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

Constructor Detail

ListPat

public ListPat(int len)

ListPat

public ListPat(int min,
               int max)

ListPat

public ListPat(int min,
               int max,
               java.lang.Object default_val)

Method Detail

match

public static boolean match(int min,
                            int max,
                            java.lang.Object default_val,
                            java.lang.Object obj,
                            java.lang.Object[] vars,
                            int start_vars)

match

public static java.lang.Object[] match(int min,
                                       int max,
                                       java.lang.Object default_val,
                                       java.lang.Object obj)

Succeeds if obj is a list of length [min..max].

Parameters:

obj - the object to match against

Returns:

true iff the match succeeded On success, max_length values from the elements of the list are placed in vars (starting at start_vars); if obj is shorter, missing elements are set to default_value.

match

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

Succeeds if obj is a list of length [min_length..max_length].

Specified by:

match in class Pattern

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:

null on failure, or an array of bound pattern variables: max_length values from the elements of the list are placed in the result; if obj is shorter, missing elements are set to default_value.

varCount

public int varCount()

Specified by:

varCount in class Pattern

print

public void print(Consumer out)

Specified by:

print in interface gnu.kawa.format.Printable

Overrides:

print in class Pattern