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#=======================================================================
#
# Python Lexical Analyser
#
# Exception classes
#
#=======================================================================
class PlexError(Exception):
message = ""
class PlexTypeError(PlexError, TypeError):
pass
class PlexValueError(PlexError, ValueError):
pass
class InvalidRegex(PlexError):
pass
class InvalidToken(PlexError):
def __init__(self, token_number, message):
PlexError.__init__(self, "Token number %d: %s" % (token_number, message))
class InvalidScanner(PlexError):
pass
class AmbiguousAction(PlexError):
message = "Two tokens with different actions can match the same string"
def __init__(self):
pass
class UnrecognizedInput(PlexError):
scanner = None
position = None
state_name = None
def __init__(self, scanner, state_name):
self.scanner = scanner
self.position = scanner.get_position()
self.state_name = state_name
def __str__(self):
return ("'%s', line %d, char %d: Token not recognised in state %s"
% (self.position + (repr(self.state_name),)))