# The contents of this file are subject to the Mozilla Public License
# (MPL) Version 1.1 (the "License"); you may not use this file except
# in compliance with the License. You may obtain a copy of the License
# at http://www.mozilla.org/MPL/
#
# Software distributed under the License is distributed on an "AS IS"
# basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
# the License for the specific language governing rights and
# limitations under the License.
#
# The Original Code is LEPL (http://www.acooke.org/lepl)
# The Initial Developer of the Original Code is Andrew Cooke.
# Portions created by the Initial Developer are Copyright (C) 2009-2010
# Andrew Cooke (andrew@acooke.org). All Rights Reserved.
#
# Alternatively, the contents of this file may be used under the terms
# of the LGPL license (the GNU Lesser General Public License,
# http://www.gnu.org/licenses/lgpl.html), in which case the provisions
# of the LGPL License are applicable instead of those above.
#
# If you wish to allow use of your version of this file only under the
# terms of the LGPL License and not to allow others to use your version
# of this file under the MPL, indicate your decision by deleting the
# provisions above and replace them with the notice and other provisions
# required by the LGPL License.  If you do not delete the provisions
# above, a recipient may use your version of this file under either the
# MPL or the LGPL License.

# pylint: disable-msg=W0401,C0111,W0614,W0622,C0301,C0321,C0324,C0103,R0201,R0903
#@PydevCodeAnalysisIgnore
# (the code style is for documentation, not "real")

'''
Examples from the documentation.
'''

#from logging import basicConfig, DEBUG

from lepl import *
from lepl._example.support import Example


class Tutorial3Example(Example):
    
    def run_add_sub_node(self):
        value = Token(UnsignedReal())
        symbol = Token('[^0-9a-zA-Z \t\r\n]')
        number = Optional(symbol('-')) + value >> float
        expr = Delayed()
        add = number & symbol('+') & expr > List
        sub = number & symbol('-') & expr > List
        expr += add | sub | number
        return expr.parse('1+2-3 +4-5')[0]

    def test_all(self):
        
        abc = Node('a', 'b', 'c')
        fb = Node(('foo', 23), ('bar', 'baz'))
        fbz = Node(('foo', 23), ('bar', 'baz'), 43, 'zap', ('foo', 'again'))
        
        self.examples([
(self.run_add_sub_node,
"""List
 +- 1.0
 +- '+'
 `- List
     +- 2.0
     +- '-'
     `- List
         +- 3.0
         +- '+'
         `- List
             +- 4.0
             +- '-'
             `- 5.0"""),
(lambda: abc[1], """b"""),
(lambda: abc[1:], """['b', 'c']"""),
(lambda: abc[:-1], """['a', 'b']"""),
(lambda: fb.foo, """[23]"""),
(lambda: fb.bar, """['baz']"""),
(lambda: fbz[:], """[23, 'baz', 43, 'zap', 'again']"""),
(lambda: fbz.foo, """[23, 'again']"""),
])