sdl92Parser.py

# $ANTLR 3.1.3 Mar 17, 2009 19:23:44 sdl92.g 2017-03-20 14:35:42

import sys
from antlr3 import *
from antlr3.compat import set, frozenset

from antlr3.tree import *



# for convenience in actions
HIDDEN = BaseRecognizer.HIDDEN

# token types
CREATE=160
ENTRY_POINT=32
ENDSTATE=139
STR=216
PROCESS=76
STOP=97
ENDFOR=162
PROVIDED=77
CONDITIONAL=19
CHANNEL=13
THEN=111
XOR=166
CALL=150
A=189
B=211
PFPAR=70
SET=88
C=193
D=192
E=195
F=202
G=203
H=205
L_BRACKET=187
I=201
OPEN_RANGE=63
J=212
K=196
L=194
M=199
ENDSYSTEM=122
N=190
O=204
P=197
Q=221
R=198
S=200
T=206
U=208
VARIABLE=118
V=209
GROUND=45
W=210
X=207
Y=191
FPAR=44
Z=222
PROCEDURE=73
PARAMNAMES=67
PAREN=69
APPEND=169
NEWTYPE=59
CONNECTION=21
DIV=170
SELECTOR=85
MINUS_INFINITY=177
STRING=99
VARIABLES=119
TO=113
REM=172
ASSIG_OP=186
SYSTEM=104
ROUTE=83
T__223=223
ENDCHANNEL=124
IFTHENELSE=48
TASK_BODY=106
ALPHA=217
PRIORITY=146
VIEW=214
HYPERLINK=46
LABEL=56
CIF=15
OUTPUT=64
FOR=43
INPUTLIST=54
EQ=154
FLOATING_LABEL=42
VIAPATH=121
FLOAT2=40
NOT=173
SPECIFIC=182
STIMULUS=96
THIS=161
ENDPROCEDURE=134
END=185
AGGREGATION=141
FI=36
DIGITS=26
STATE=92
OUTPUT_BODY=65
QUESTION=78
BITSTR=11
BASE=179
RETURN=81
STATE_AGGREGATION=93
ENDNEWTYPE=29
SEQUENCE=87
R_PAREN=148
WS=219
EOF=-1
GE=159
NEXTSTATE=60
ANSWER=7
MOD=171
SEQOF=86
PLUS_INFINITY=176
PARAM=66
R_BRACKET=188
GT=156
WITH=126
ACTION=4
T__229=229
STOPIF=98
T__228=228
START=137
FALSE=175
T__225=225
T__224=224
T__227=227
DEFAULT=144
T__226=226
IMPLIES=164
ENDCONNECTION=138
ENDDECISION=152
EXPORT=33
JOIN=55
TEXT=108
REFERENCED=131
ALTERNATIVE=6
SYNTYPE=103
ELSE=27
PROCEDURE_NAME=75
ID=123
NONE=145
IF=47
TYPE=130
SUBSTRUCTURE=142
FIELDS=39
LITERAL=57
IN=49
FIELD=37
DOT=163
SYNONYM=101
OUT=135
ENDBLOCK=127
STATELIST=95
SEMI=133
CONNECT=20
ASN1=9
ASSIGN=10
COMMENT=17
IMPORT=213
MANTISSA=178
SAVE=84
CLOSED_RANGE=16
SIGNAL=89
COMMA=149
ENDTEXT=31
NUMBER_OF_INSTANCES=61
USE=116
RETURNS=82
CONSTANT=22
ASTERISK=140
COMMENT2=220
TRANSITION=114
NEG=58
LE=158
EXPONENT=180
NEQ=155
GEODE=183
EXPRESSION=34
ALL=5
SYNONYM_LIST=102
TERMINATOR=107
DECISION=25
TEXTAREA_CONTENT=110
ARRAY=8
INPUT=52
LT=157
STATE_PARTITION_CONNECTION=94
ENDALTERNATIVE=151
RESET=80
VALUE=117
FROM=125
DASH=168
TASK=105
KEEP=181
BLOCK=12
TRUE=174
ENDSYNTYPE=30
DCL=24
OCTSTR=62
AND=129
SORT=91
PARAMS=68
STRUCT=100
RANGE=79
PLUS=167
INOUT=51
FLOAT=41
CONSTANTS=23
ACTIVE=215
Exponent=218
L_PAREN=147
ANY=153
INT=136
CHOICE=14
EXTERNAL=35
FIELD_NAME=38
TYPE_INSTANCE=115
ENDSUBSTRUCTURE=143
PROCEDURE_CALL=74
TEXTAREA=109
OR=165
SIGNAL_LIST=90
INFORMAL_TEXT=50
TIMER=112
PRIMARY=72
COMPOSITE_STATE=18
VIA=120
ASNFILENAME=184
ENDPROCESS=132
EMPTYSTR=28
SIGNALROUTE=128
INPUT_NONE=53
POINT=71

# token names
tokenNames = [
    "<invalid>", "<EOR>", "<DOWN>", "<UP>", 
    "ACTION", "ALL", "ALTERNATIVE", "ANSWER", "ARRAY", "ASN1", "ASSIGN", 
    "BITSTR", "BLOCK", "CHANNEL", "CHOICE", "CIF", "CLOSED_RANGE", "COMMENT", 
    "COMPOSITE_STATE", "CONDITIONAL", "CONNECT", "CONNECTION", "CONSTANT", 
    "CONSTANTS", "DCL", "DECISION", "DIGITS", "ELSE", "EMPTYSTR", "ENDNEWTYPE", 
    "ENDSYNTYPE", "ENDTEXT", "ENTRY_POINT", "EXPORT", "EXPRESSION", "EXTERNAL", 
    "FI", "FIELD", "FIELD_NAME", "FIELDS", "FLOAT2", "FLOAT", "FLOATING_LABEL", 
    "FOR", "FPAR", "GROUND", "HYPERLINK", "IF", "IFTHENELSE", "IN", "INFORMAL_TEXT", 
    "INOUT", "INPUT", "INPUT_NONE", "INPUTLIST", "JOIN", "LABEL", "LITERAL", 
    "NEG", "NEWTYPE", "NEXTSTATE", "NUMBER_OF_INSTANCES", "OCTSTR", "OPEN_RANGE", 
    "OUTPUT", "OUTPUT_BODY", "PARAM", "PARAMNAMES", "PARAMS", "PAREN", "PFPAR", 
    "POINT", "PRIMARY", "PROCEDURE", "PROCEDURE_CALL", "PROCEDURE_NAME", 
    "PROCESS", "PROVIDED", "QUESTION", "RANGE", "RESET", "RETURN", "RETURNS", 
    "ROUTE", "SAVE", "SELECTOR", "SEQOF", "SEQUENCE", "SET", "SIGNAL", "SIGNAL_LIST", 
    "SORT", "STATE", "STATE_AGGREGATION", "STATE_PARTITION_CONNECTION", 
    "STATELIST", "STIMULUS", "STOP", "STOPIF", "STRING", "STRUCT", "SYNONYM", 
    "SYNONYM_LIST", "SYNTYPE", "SYSTEM", "TASK", "TASK_BODY", "TERMINATOR", 
    "TEXT", "TEXTAREA", "TEXTAREA_CONTENT", "THEN", "TIMER", "TO", "TRANSITION", 
    "TYPE_INSTANCE", "USE", "VALUE", "VARIABLE", "VARIABLES", "VIA", "VIAPATH", 
    "ENDSYSTEM", "ID", "ENDCHANNEL", "FROM", "WITH", "ENDBLOCK", "SIGNALROUTE", 
    "AND", "TYPE", "REFERENCED", "ENDPROCESS", "SEMI", "ENDPROCEDURE", "OUT", 
    "INT", "START", "ENDCONNECTION", "ENDSTATE", "ASTERISK", "AGGREGATION", 
    "SUBSTRUCTURE", "ENDSUBSTRUCTURE", "DEFAULT", "NONE", "PRIORITY", "L_PAREN", 
    "R_PAREN", "COMMA", "CALL", "ENDALTERNATIVE", "ENDDECISION", "ANY", 
    "EQ", "NEQ", "GT", "LT", "LE", "GE", "CREATE", "THIS", "ENDFOR", "DOT", 
    "IMPLIES", "OR", "XOR", "PLUS", "DASH", "APPEND", "DIV", "MOD", "REM", 
    "NOT", "TRUE", "FALSE", "PLUS_INFINITY", "MINUS_INFINITY", "MANTISSA", 
    "BASE", "EXPONENT", "KEEP", "SPECIFIC", "GEODE", "ASNFILENAME", "END", 
    "ASSIG_OP", "L_BRACKET", "R_BRACKET", "A", "N", "Y", "D", "C", "L", 
    "E", "K", "P", "R", "M", "S", "I", "F", "G", "O", "H", "T", "X", "U", 
    "V", "W", "B", "J", "IMPORT", "VIEW", "ACTIVE", "STR", "ALPHA", "Exponent", 
    "WS", "COMMENT2", "Q", "Z", "':'", "'->'", "'!'", "'(.'", "'.)'", "'/* CIF'", 
    "'*/'"
]




class sdl92Parser(Parser):
    grammarFileName = "sdl92.g"
    antlr_version = version_str_to_tuple("3.1.3 Mar 17, 2009 19:23:44")
    antlr_version_str = "3.1.3 Mar 17, 2009 19:23:44"
    tokenNames = tokenNames

    def __init__(self, input, state=None, *args, **kwargs):
        if state is None:
            state = RecognizerSharedState()

        super(sdl92Parser, self).__init__(input, state, *args, **kwargs)

        self.dfa21 = self.DFA21(
            self, 21,
            eot = self.DFA21_eot,
            eof = self.DFA21_eof,
            min = self.DFA21_min,
            max = self.DFA21_max,
            accept = self.DFA21_accept,
            special = self.DFA21_special,
            transition = self.DFA21_transition
            )

        self.dfa22 = self.DFA22(
            self, 22,
            eot = self.DFA22_eot,
            eof = self.DFA22_eof,
            min = self.DFA22_min,
            max = self.DFA22_max,
            accept = self.DFA22_accept,
            special = self.DFA22_special,
            transition = self.DFA22_transition
            )

        self.dfa26 = self.DFA26(
            self, 26,
            eot = self.DFA26_eot,
            eof = self.DFA26_eof,
            min = self.DFA26_min,
            max = self.DFA26_max,
            accept = self.DFA26_accept,
            special = self.DFA26_special,
            transition = self.DFA26_transition
            )

        self.dfa28 = self.DFA28(
            self, 28,
            eot = self.DFA28_eot,
            eof = self.DFA28_eof,
            min = self.DFA28_min,
            max = self.DFA28_max,
            accept = self.DFA28_accept,
            special = self.DFA28_special,
            transition = self.DFA28_transition
            )

        self.dfa40 = self.DFA40(
            self, 40,
            eot = self.DFA40_eot,
            eof = self.DFA40_eof,
            min = self.DFA40_min,
            max = self.DFA40_max,
            accept = self.DFA40_accept,
            special = self.DFA40_special,
            transition = self.DFA40_transition
            )

        self.dfa45 = self.DFA45(
            self, 45,
            eot = self.DFA45_eot,
            eof = self.DFA45_eof,
            min = self.DFA45_min,
            max = self.DFA45_max,
            accept = self.DFA45_accept,
            special = self.DFA45_special,
            transition = self.DFA45_transition
            )

        self.dfa52 = self.DFA52(
            self, 52,
            eot = self.DFA52_eot,
            eof = self.DFA52_eof,
            min = self.DFA52_min,
            max = self.DFA52_max,
            accept = self.DFA52_accept,
            special = self.DFA52_special,
            transition = self.DFA52_transition
            )

        self.dfa58 = self.DFA58(
            self, 58,
            eot = self.DFA58_eot,
            eof = self.DFA58_eof,
            min = self.DFA58_min,
            max = self.DFA58_max,
            accept = self.DFA58_accept,
            special = self.DFA58_special,
            transition = self.DFA58_transition
            )

        self.dfa59 = self.DFA59(
            self, 59,
            eot = self.DFA59_eot,
            eof = self.DFA59_eof,
            min = self.DFA59_min,
            max = self.DFA59_max,
            accept = self.DFA59_accept,
            special = self.DFA59_special,
            transition = self.DFA59_transition
            )

        self.dfa63 = self.DFA63(
            self, 63,
            eot = self.DFA63_eot,
            eof = self.DFA63_eof,
            min = self.DFA63_min,
            max = self.DFA63_max,
            accept = self.DFA63_accept,
            special = self.DFA63_special,
            transition = self.DFA63_transition
            )

        self.dfa82 = self.DFA82(
            self, 82,
            eot = self.DFA82_eot,
            eof = self.DFA82_eof,
            min = self.DFA82_min,
            max = self.DFA82_max,
            accept = self.DFA82_accept,
            special = self.DFA82_special,
            transition = self.DFA82_transition
            )

        self.dfa85 = self.DFA85(
            self, 85,
            eot = self.DFA85_eot,
            eof = self.DFA85_eof,
            min = self.DFA85_min,
            max = self.DFA85_max,
            accept = self.DFA85_accept,
            special = self.DFA85_special,
            transition = self.DFA85_transition
            )

        self.dfa90 = self.DFA90(
            self, 90,
            eot = self.DFA90_eot,
            eof = self.DFA90_eof,
            min = self.DFA90_min,
            max = self.DFA90_max,
            accept = self.DFA90_accept,
            special = self.DFA90_special,
            transition = self.DFA90_transition
            )

        self.dfa91 = self.DFA91(
            self, 91,
            eot = self.DFA91_eot,
            eof = self.DFA91_eof,
            min = self.DFA91_min,
            max = self.DFA91_max,
            accept = self.DFA91_accept,
            special = self.DFA91_special,
            transition = self.DFA91_transition
            )

        self.dfa92 = self.DFA92(
            self, 92,
            eot = self.DFA92_eot,
            eof = self.DFA92_eof,
            min = self.DFA92_min,
            max = self.DFA92_max,
            accept = self.DFA92_accept,
            special = self.DFA92_special,
            transition = self.DFA92_transition
            )

        self.dfa94 = self.DFA94(
            self, 94,
            eot = self.DFA94_eot,
            eof = self.DFA94_eof,
            min = self.DFA94_min,
            max = self.DFA94_max,
            accept = self.DFA94_accept,
            special = self.DFA94_special,
            transition = self.DFA94_transition
            )

        self.dfa98 = self.DFA98(
            self, 98,
            eot = self.DFA98_eot,
            eof = self.DFA98_eof,
            min = self.DFA98_min,
            max = self.DFA98_max,
            accept = self.DFA98_accept,
            special = self.DFA98_special,
            transition = self.DFA98_transition
            )

        self.dfa107 = self.DFA107(
            self, 107,
            eot = self.DFA107_eot,
            eof = self.DFA107_eof,
            min = self.DFA107_min,
            max = self.DFA107_max,
            accept = self.DFA107_accept,
            special = self.DFA107_special,
            transition = self.DFA107_transition
            )

        self.dfa112 = self.DFA112(
            self, 112,
            eot = self.DFA112_eot,
            eof = self.DFA112_eof,
            min = self.DFA112_min,
            max = self.DFA112_max,
            accept = self.DFA112_accept,
            special = self.DFA112_special,
            transition = self.DFA112_transition
            )

        self.dfa113 = self.DFA113(
            self, 113,
            eot = self.DFA113_eot,
            eof = self.DFA113_eof,
            min = self.DFA113_min,
            max = self.DFA113_max,
            accept = self.DFA113_accept,
            special = self.DFA113_special,
            transition = self.DFA113_transition
            )

        self.dfa121 = self.DFA121(
            self, 121,
            eot = self.DFA121_eot,
            eof = self.DFA121_eof,
            min = self.DFA121_min,
            max = self.DFA121_max,
            accept = self.DFA121_accept,
            special = self.DFA121_special,
            transition = self.DFA121_transition
            )

        self.dfa118 = self.DFA118(
            self, 118,
            eot = self.DFA118_eot,
            eof = self.DFA118_eof,
            min = self.DFA118_min,
            max = self.DFA118_max,
            accept = self.DFA118_accept,
            special = self.DFA118_special,
            transition = self.DFA118_transition
            )

        self.dfa119 = self.DFA119(
            self, 119,
            eot = self.DFA119_eot,
            eof = self.DFA119_eof,
            min = self.DFA119_min,
            max = self.DFA119_max,
            accept = self.DFA119_accept,
            special = self.DFA119_special,
            transition = self.DFA119_transition
            )

        self.dfa120 = self.DFA120(
            self, 120,
            eot = self.DFA120_eot,
            eof = self.DFA120_eof,
            min = self.DFA120_min,
            max = self.DFA120_max,
            accept = self.DFA120_accept,
            special = self.DFA120_special,
            transition = self.DFA120_transition
            )

        self.dfa122 = self.DFA122(
            self, 122,
            eot = self.DFA122_eot,
            eof = self.DFA122_eof,
            min = self.DFA122_min,
            max = self.DFA122_max,
            accept = self.DFA122_accept,
            special = self.DFA122_special,
            transition = self.DFA122_transition
            )

        self.dfa123 = self.DFA123(
            self, 123,
            eot = self.DFA123_eot,
            eof = self.DFA123_eof,
            min = self.DFA123_min,
            max = self.DFA123_max,
            accept = self.DFA123_accept,
            special = self.DFA123_special,
            transition = self.DFA123_transition
            )

        self.dfa134 = self.DFA134(
            self, 134,
            eot = self.DFA134_eot,
            eof = self.DFA134_eof,
            min = self.DFA134_min,
            max = self.DFA134_max,
            accept = self.DFA134_accept,
            special = self.DFA134_special,
            transition = self.DFA134_transition
            )

        self.dfa132 = self.DFA132(
            self, 132,
            eot = self.DFA132_eot,
            eof = self.DFA132_eof,
            min = self.DFA132_min,
            max = self.DFA132_max,
            accept = self.DFA132_accept,
            special = self.DFA132_special,
            transition = self.DFA132_transition
            )

        self.dfa142 = self.DFA142(
            self, 142,
            eot = self.DFA142_eot,
            eof = self.DFA142_eof,
            min = self.DFA142_min,
            max = self.DFA142_max,
            accept = self.DFA142_accept,
            special = self.DFA142_special,
            transition = self.DFA142_transition
            )

        self.dfa148 = self.DFA148(
            self, 148,
            eot = self.DFA148_eot,
            eof = self.DFA148_eof,
            min = self.DFA148_min,
            max = self.DFA148_max,
            accept = self.DFA148_accept,
            special = self.DFA148_special,
            transition = self.DFA148_transition
            )

        self.dfa181 = self.DFA181(
            self, 181,
            eot = self.DFA181_eot,
            eof = self.DFA181_eof,
            min = self.DFA181_min,
            max = self.DFA181_max,
            accept = self.DFA181_accept,
            special = self.DFA181_special,
            transition = self.DFA181_transition
            )

        self.dfa186 = self.DFA186(
            self, 186,
            eot = self.DFA186_eot,
            eof = self.DFA186_eof,
            min = self.DFA186_min,
            max = self.DFA186_max,
            accept = self.DFA186_accept,
            special = self.DFA186_special,
            transition = self.DFA186_transition
            )

        self.dfa188 = self.DFA188(
            self, 188,
            eot = self.DFA188_eot,
            eof = self.DFA188_eof,
            min = self.DFA188_min,
            max = self.DFA188_max,
            accept = self.DFA188_accept,
            special = self.DFA188_special,
            transition = self.DFA188_transition
            )

        self.dfa192 = self.DFA192(
            self, 192,
            eot = self.DFA192_eot,
            eof = self.DFA192_eof,
            min = self.DFA192_min,
            max = self.DFA192_max,
            accept = self.DFA192_accept,
            special = self.DFA192_special,
            transition = self.DFA192_transition
            )

        self.dfa194 = self.DFA194(
            self, 194,
            eot = self.DFA194_eot,
            eof = self.DFA194_eof,
            min = self.DFA194_min,
            max = self.DFA194_max,
            accept = self.DFA194_accept,
            special = self.DFA194_special,
            transition = self.DFA194_transition
            )






        self._adaptor = None
        self.adaptor = CommonTreeAdaptor()
                


        
    def getTreeAdaptor(self):
        return self._adaptor

    def setTreeAdaptor(self, adaptor):
        self._adaptor = adaptor

    adaptor = property(getTreeAdaptor, setTreeAdaptor)


    class pr_file_return(ParserRuleReturnScope):
        def __init__(self):
            super(sdl92Parser.pr_file_return, self).__init__()

            self.tree = None




    # $ANTLR start "pr_file"
    # sdl92.g:146:1: pr_file : ( use_clause | system_definition | process_definition )+ ;
    def pr_file(self, ):

        retval = self.pr_file_return()
        retval.start = self.input.LT(1)

        root_0 = None

        use_clause1 = None

        system_definition2 = None

        process_definition3 = None



        try:
            try:
                # sdl92.g:147:9: ( ( use_clause | system_definition | process_definition )+ )
                # sdl92.g:147:17: ( use_clause | system_definition | process_definition )+
                pass 
                root_0 = self._adaptor.nil()

                # sdl92.g:147:17: ( use_clause | system_definition | process_definition )+
                cnt1 = 0
                while True: #loop1
                    alt1 = 4
                    LA1 = self.input.LA(1)
                    if LA1 == 228:
                        LA1_2 = self.input.LA(2)

                        if (LA1_2 == ANSWER or LA1_2 == COMMENT or LA1_2 == CONNECT or LA1_2 == DECISION or LA1_2 == INPUT or (JOIN <= LA1_2 <= LABEL) or LA1_2 == NEXTSTATE or LA1_2 == OUTPUT or (PROCEDURE <= LA1_2 <= PROCEDURE_CALL) or (PROCESS <= LA1_2 <= PROVIDED) or LA1_2 == RETURN or LA1_2 == STATE or LA1_2 == STOP or LA1_2 == TASK or LA1_2 == TEXT or LA1_2 == START) :
                            alt1 = 3
                        elif (LA1_2 == KEEP) :
                            alt1 = 1


                    elif LA1 == USE:
                        alt1 = 1
                    elif LA1 == SYSTEM:
                        alt1 = 2
                    elif LA1 == PROCESS:
                        alt1 = 3

                    if alt1 == 1:
                        # sdl92.g:147:18: use_clause
                        pass 
                        self._state.following.append(self.FOLLOW_use_clause_in_pr_file1375)
                        use_clause1 = self.use_clause()

                        self._state.following.pop()
                        if self._state.backtracking == 0:
                            self._adaptor.addChild(root_0, use_clause1.tree)


                    elif alt1 == 2:
                        # sdl92.g:148:19: system_definition
                        pass 
                        self._state.following.append(self.FOLLOW_system_definition_in_pr_file1395)
                        system_definition2 = self.system_definition()

                        self._state.following.pop()
                        if self._state.backtracking == 0:
                            self._adaptor.addChild(root_0, system_definition2.tree)


                    elif alt1 == 3:
                        # sdl92.g:149:19: process_definition
                        pass 
                        self._state.following.append(self.FOLLOW_process_definition_in_pr_file1415)
                        process_definition3 = self.process_definition()

                        self._state.following.pop()
                        if self._state.backtracking == 0:
                            self._adaptor.addChild(root_0, process_definition3.tree)


                    else:
                        if cnt1 >= 1:
                            break #loop1

                        if self._state.backtracking > 0:
                            raise BacktrackingFailed

                        eee = EarlyExitException(1, self.input)
                        raise eee

                    cnt1 += 1



                retval.stop = self.input.LT(-1)

                if self._state.backtracking == 0:

                    retval.tree = self._adaptor.rulePostProcessing(root_0)
                    self._adaptor.setTokenBoundaries(retval.tree, retval.start, retval.stop)


            except RecognitionException, re:
                self.reportError(re)
                self.recover(self.input, re)
                retval.tree = self._adaptor.errorNode(self.input, retval.start, self.input.LT(-1), re)
        finally:

            pass
        return retval

    # $ANTLR end "pr_file"

    class system_definition_return(ParserRuleReturnScope):
        def __init__(self):
            super(sdl92Parser.system_definition_return, self).__init__()

            self.tree = None




    # $ANTLR start "system_definition"
    # sdl92.g:153:1: system_definition : SYSTEM system_name end ( entity_in_system )* ENDSYSTEM ( system_name )? end -> ^( SYSTEM system_name ( entity_in_system )* ) ;
    def system_definition(self, ):

        retval = self.system_definition_return()
        retval.start = self.input.LT(1)

        root_0 = None

        SYSTEM4 = None
        ENDSYSTEM8 = None
        system_name5 = None

        end6 = None

        entity_in_system7 = None

        system_name9 = None

        end10 = None


        SYSTEM4_tree = None
        ENDSYSTEM8_tree = None
        stream_SYSTEM = RewriteRuleTokenStream(self._adaptor, "token SYSTEM")
        stream_ENDSYSTEM = RewriteRuleTokenStream(self._adaptor, "token ENDSYSTEM")
        stream_entity_in_system = RewriteRuleSubtreeStream(self._adaptor, "rule entity_in_system")
        stream_system_name = RewriteRuleSubtreeStream(self._adaptor, "rule system_name")
        stream_end = RewriteRuleSubtreeStream(self._adaptor, "rule end")
        try:
            try:
                # sdl92.g:154:9: ( SYSTEM system_name end ( entity_in_system )* ENDSYSTEM ( system_name )? end -> ^( SYSTEM system_name ( entity_in_system )* ) )
                # sdl92.g:154:17: SYSTEM system_name end ( entity_in_system )* ENDSYSTEM ( system_name )? end
                pass 
                SYSTEM4=self.match(self.input, SYSTEM, self.FOLLOW_SYSTEM_in_system_definition1449) 
                if self._state.backtracking == 0:
                    stream_SYSTEM.add(SYSTEM4)
                self._state.following.append(self.FOLLOW_system_name_in_system_definition1451)
                system_name5 = self.system_name()

                self._state.following.pop()
                if self._state.backtracking == 0:
                    stream_system_name.add(system_name5.tree)
                self._state.following.append(self.FOLLOW_end_in_system_definition1453)
                end6 = self.end()

                self._state.following.pop()
                if self._state.backtracking == 0:
                    stream_end.add(end6.tree)
                # sdl92.g:155:17: ( entity_in_system )*
                while True: #loop2
                    alt2 = 2
                    LA2_0 = self.input.LA(1)

                    if ((BLOCK <= LA2_0 <= CHANNEL) or LA2_0 == PROCEDURE or LA2_0 == SIGNAL or LA2_0 == 228) :
                        alt2 = 1


                    if alt2 == 1:
                        # sdl92.g:0:0: entity_in_system
                        pass 
                        self._state.following.append(self.FOLLOW_entity_in_system_in_system_definition1471)
                        entity_in_system7 = self.entity_in_system()

                        self._state.following.pop()
                        if self._state.backtracking == 0:
                            stream_entity_in_system.add(entity_in_system7.tree)


                    else:
                        break #loop2
                ENDSYSTEM8=self.match(self.input, ENDSYSTEM, self.FOLLOW_ENDSYSTEM_in_system_definition1490) 
                if self._state.backtracking == 0:
                    stream_ENDSYSTEM.add(ENDSYSTEM8)
                # sdl92.g:156:27: ( system_name )?
                alt3 = 2
                LA3_0 = self.input.LA(1)

                if (LA3_0 == ID) :
                    alt3 = 1
                if alt3 == 1:
                    # sdl92.g:0:0: system_name
                    pass 
                    self._state.following.append(self.FOLLOW_system_name_in_system_definition1492)
                    system_name9 = self.system_name()

                    self._state.following.pop()
                    if self._state.backtracking == 0:
                        stream_system_name.add(system_name9.tree)



                self._state.following.append(self.FOLLOW_end_in_system_definition1495)
                end10 = self.end()

                self._state.following.pop()
                if self._state.backtracking == 0:
                    stream_end.add(end10.tree)

                # AST Rewrite
                # elements: entity_in_system, system_name, SYSTEM
                # token labels: 
                # rule labels: retval
                # token list labels: 
                # rule list labels: 
                # wildcard labels: 
                if self._state.backtracking == 0:

                    retval.tree = root_0

                    if retval is not None:
                        stream_retval = RewriteRuleSubtreeStream(self._adaptor, "rule retval", retval.tree)
                    else:
                        stream_retval = RewriteRuleSubtreeStream(self._adaptor, "token retval", None)


                    root_0 = self._adaptor.nil()
                    # 157:9: -> ^( SYSTEM system_name ( entity_in_system )* )
                    # sdl92.g:157:17: ^( SYSTEM system_name ( entity_in_system )* )
                    root_1 = self._adaptor.nil()
                    root_1 = self._adaptor.becomeRoot(stream_SYSTEM.nextNode(), root_1)

                    self._adaptor.addChild(root_1, stream_system_name.nextTree())
                    # sdl92.g:157:38: ( entity_in_system )*
                    while stream_entity_in_system.hasNext():
                        self._adaptor.addChild(root_1, stream_entity_in_system.nextTree())


                    stream_entity_in_system.reset();

                    self._adaptor.addChild(root_0, root_1)



                    retval.tree = root_0



                retval.stop = self.input.LT(-1)

                if self._state.backtracking == 0:

                    retval.tree = self._adaptor.rulePostProcessing(root_0)
                    self._adaptor.setTokenBoundaries(retval.tree, retval.start, retval.stop)


            except RecognitionException, re:
                self.reportError(re)
                self.recover(self.input, re)
                retval.tree = self._adaptor.errorNode(self.input, retval.start, self.input.LT(-1), re)
        finally:

            pass
        return retval

    # $ANTLR end "system_definition"

    class use_clause_return(ParserRuleReturnScope):
        def __init__(self):
            super(sdl92Parser.use_clause_return, self).__init__()

            self.tree = None




    # $ANTLR start "use_clause"
    # sdl92.g:161:1: use_clause : ( use_asn1 )? USE package_name ( '/' def_selection_list )? end -> ^( USE ( use_asn1 )? ( end )? package_name ( def_selection_list )? ) ;
    def use_clause(self, ):

        retval = self.use_clause_return()
        retval.start = self.input.LT(1)