Exscript/interpreter/variable.py
#
# Copyright (C) 2010-2017 Samuel Abels
# The MIT License (MIT)
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files
# (the "Software"), to deal in the Software without restriction,
# including without limitation the rights to use, copy, modify, merge,
# publish, distribute, sublicense, and/or sell copies of the Software,
# and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
from __future__ import print_function, absolute_import
from ..parselib import Token
class Variable(Token):
def __init__(self, lexer, parser, parent):
Token.__init__(self, 'Variable', lexer, parser, parent)
self.varname = lexer.token()[1]
lexer.expect(self, 'varname')
self.mark_end()
def value(self, context):
val = self.parent.get(self.varname)
if val is None:
msg = 'Undefined variable %s' % self.varname
self.lexer.runtime_error(msg, self)
return val
def dump(self, indent=0):
print((' ' * indent) + 'Variable', self.varname, '.')