#!/usr/bin/python
# -*- coding: utf-8 -*-

# ---------------------------------------------------------------------
# Copyright (c) 2012 Michael Hull.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
#  - Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#  - Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in
#    the documentation and/or other materials provided with the
#    distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
#  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
# ----------------------------------------------------------------------

import ply
import ply.lex
import ply.yacc


[docs]class TraceGeneratorParserLexer(object):

    reserved = {
        'AT': 'AT',
        'FOR': 'FOR',
        'UNTIL': 'UNTIL',
        'THEN': 'THEN',
        'FLAT': 'FLAT',
        'RAMPTO': 'RAMPTO',
        'ms': 'MS',
        'd': 'D',
        }

    tokens = [
        'CURLY_LBRACE',
        'CURLY_RBRACE',
        'COLON',
        'LPAREN',
        'RPAREN',
        'FLOAT',
        'ID',
        ] + list(reserved.values())

    t_CURLY_LBRACE = '{'
    t_CURLY_RBRACE = '}'
    t_COLON = ':'
    t_LPAREN = "\("
    t_RPAREN = "\)"
    t_ignore = ' \t'

[docs]    def t_FLOAT(self, t):
        r"""[-]?[0-9]+(\.[0-9]*([eE][+-]?[0-9]+)?)?"""

        t.value = float(t.value)
        return t

[docs]    def t_ID(self, t):
        r'''[a-zA-Z_][a-zA-Z_0-9]*'''

        t.type = self.reserved.get(t.value, 'ID')
        return t

[docs]    def t_error(self, t):
        print "Illegal character '%s'" % t.value[0]
        assert False

[docs]    def __init__(self, **kwargs):
        self.lexer = ply.lex.lex(module=self, **kwargs)

    # Forward to lexer:
[docs]    def input(self, *args, **kwargs):
        return self.lexer.input(*args, **kwargs)

    def token(self, *args, **kwargs):
        return self.lexer.token(*args, **kwargs)