#-*- coding: utf-8 -*-
#
# Copyright (C) 2005-2010 TUBITAK/UEKAE
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free
# Software Foundation; either version 2 of the License, or (at your option)
# any later version.
#
# Please read the COPYING file.

# Standard Python Modules
import re
import sys


from itertools import count

from itertools import filterfalse

# ActionsAPI
import pisilinux.actionsapi

def cat(filename):
    return file(filename)

class grep:
    '''keep only lines that match the regexp'''
    def __init__(self, pat, flags = 0):
        self.fun = re.compile(pat, flags).match
    def __ror__(self, input):
        return filter(self.fun, input)

class tr:
    '''apply arbitrary transform to each sequence element'''
    def __init__(self, transform):
        self.tr = transform
    def __ror__(self, input):
        return map(self.tr, input)

class printto:
    '''print sequence elements one per line'''
    def __init__(self, out = sys.stdout):
        self.out = out
    def __ror__(self,input):
        for line in input:
            print(line, file=self.out)

printlines = printto(sys.stdout)

class terminator:
    def __init__(self,method):
        self.process = method
    def __ror__(self,input):
        return self.process(input)

aslist = terminator(list)
asdict = terminator(dict)
astuple = terminator(tuple)
join = terminator(''.join)
enum = terminator(enumerate)

class sort:
    def __ror__(self,input):
        ll = list(input)
        ll.sort()
        return ll
sort = sort()

class uniq:
    def __ror__(self,input):
        for i in input:
            try:
                if i == prev:
                    continue
            except NameError:
                pass
            prev = i
            yield i
uniq = uniq()
