Add ANTLR grammar for greetings and farewells with corresponding parser and listener implementations

Week_3/week3.g4

@@ -0,0 +1,5 @@
+grammar week3;
+
+start : 'minimal' ID ;
+ID : [a-zA-Z]+ ;
+WS : [ \t\r\n]+ -> skip ;

Week_3/week3.interp

@@ -0,0 +1,18 @@
+token literal names:
+null
+'minimal'
+null
+null
+
+token symbolic names:
+null
+null
+ID
+WS
+
+rule names:
+start
+
+
+atn:
+[4, 1, 3, 6, 2, 0, 7, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 4, 0, 2, 1, 0, 0, 0, 2, 3, 5, 1, 0, 0, 3, 4, 5, 2, 0, 0, 4, 1, 1, 0, 0, 0, 0]

Week_3/week3.tokens

@@ -0,0 +1,4 @@
+T__0=1
+ID=2
+WS=3
+'minimal'=1

Week_3/week3Lexer.interp

@@ -0,0 +1,26 @@
+token literal names:
+null
+'minimal'
+null
+null
+
+token symbolic names:
+null
+null
+ID
+WS
+
+rule names:
+T__0
+ID
+WS
+
+channel names:
+DEFAULT_TOKEN_CHANNEL
+HIDDEN
+
+mode names:
+DEFAULT_MODE
+
+atn:
+[4, 0, 3, 27, 6, -1, 2, 0, 7, 0, 2, 1, 7, 1, 2, 2, 7, 2, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 4, 1, 17, 8, 1, 11, 1, 12, 1, 18, 1, 2, 4, 2, 22, 8, 2, 11, 2, 12, 2, 23, 1, 2, 1, 2, 0, 0, 3, 1, 1, 3, 2, 5, 3, 1, 0, 2, 2, 0, 65, 90, 97, 122, 3, 0, 9, 10, 13, 13, 32, 32, 28, 0, 1, 1, 0, 0, 0, 0, 3, 1, 0, 0, 0, 0, 5, 1, 0, 0, 0, 1, 7, 1, 0, 0, 0, 3, 16, 1, 0, 0, 0, 5, 21, 1, 0, 0, 0, 7, 8, 5, 109, 0, 0, 8, 9, 5, 105, 0, 0, 9, 10, 5, 110, 0, 0, 10, 11, 5, 105, 0, 0, 11, 12, 5, 109, 0, 0, 12, 13, 5, 97, 0, 0, 13, 14, 5, 108, 0, 0, 14, 2, 1, 0, 0, 0, 15, 17, 7, 0, 0, 0, 16, 15, 1, 0, 0, 0, 17, 18, 1, 0, 0, 0, 18, 16, 1, 0, 0, 0, 18, 19, 1, 0, 0, 0, 19, 4, 1, 0, 0, 0, 20, 22, 7, 1, 0, 0, 21, 20, 1, 0, 0, 0, 22, 23, 1, 0, 0, 0, 23, 21, 1, 0, 0, 0, 23, 24, 1, 0, 0, 0, 24, 25, 1, 0, 0, 0, 25, 26, 6, 2, 0, 0, 26, 6, 1, 0, 0, 0, 3, 0, 18, 23, 1, 6, 0, 0]

Week_3/week3Lexer.py

@@ -0,0 +1,56 @@
+# Generated from ./week3.g4 by ANTLR 4.13.2
+from antlr4 import *
+from io import StringIO
+import sys
+if sys.version_info[1] > 5:
+    from typing import TextIO
+else:
+    from typing.io import TextIO
+
+
+def serializedATN():
+    return [
+        4,0,3,27,6,-1,2,0,7,0,2,1,7,1,2,2,7,2,1,0,1,0,1,0,1,0,1,0,1,0,1,
+        0,1,0,1,1,4,1,17,8,1,11,1,12,1,18,1,2,4,2,22,8,2,11,2,12,2,23,1,
+        2,1,2,0,0,3,1,1,3,2,5,3,1,0,2,2,0,65,90,97,122,3,0,9,10,13,13,32,
+        32,28,0,1,1,0,0,0,0,3,1,0,0,0,0,5,1,0,0,0,1,7,1,0,0,0,3,16,1,0,0,
+        0,5,21,1,0,0,0,7,8,5,109,0,0,8,9,5,105,0,0,9,10,5,110,0,0,10,11,
+        5,105,0,0,11,12,5,109,0,0,12,13,5,97,0,0,13,14,5,108,0,0,14,2,1,
+        0,0,0,15,17,7,0,0,0,16,15,1,0,0,0,17,18,1,0,0,0,18,16,1,0,0,0,18,
+        19,1,0,0,0,19,4,1,0,0,0,20,22,7,1,0,0,21,20,1,0,0,0,22,23,1,0,0,
+        0,23,21,1,0,0,0,23,24,1,0,0,0,24,25,1,0,0,0,25,26,6,2,0,0,26,6,1,
+        0,0,0,3,0,18,23,1,6,0,0
+    ]
+
+class week3Lexer(Lexer):
+
+    atn = ATNDeserializer().deserialize(serializedATN())
+
+    decisionsToDFA = [ DFA(ds, i) for i, ds in enumerate(atn.decisionToState) ]
+
+    T__0 = 1
+    ID = 2
+    WS = 3
+
+    channelNames = [ u"DEFAULT_TOKEN_CHANNEL", u"HIDDEN" ]
+
+    modeNames = [ "DEFAULT_MODE" ]
+
+    literalNames = [ "<INVALID>",
+            "'minimal'" ]
+
+    symbolicNames = [ "<INVALID>",
+            "ID", "WS" ]
+
+    ruleNames = [ "T__0", "ID", "WS" ]
+
+    grammarFileName = "week3.g4"
+
+    def __init__(self, input=None, output:TextIO = sys.stdout):
+        super().__init__(input, output)
+        self.checkVersion("4.13.2")
+        self._interp = LexerATNSimulator(self, self.atn, self.decisionsToDFA, PredictionContextCache())
+        self._actions = None
+        self._predicates = None
+
+

Week_3/week3Lexer.tokens

@@ -0,0 +1,4 @@
+T__0=1
+ID=2
+WS=3
+'minimal'=1

Week_3/week3Listener.py

@@ -0,0 +1,21 @@
+# Generated from ./week3.g4 by ANTLR 4.13.2
+from antlr4 import *
+if "." in __name__:
+    from .week3Parser import week3Parser
+else:
+    from week3Parser import week3Parser
+
+# This class defines a complete listener for a parse tree produced by week3Parser.
+class week3Listener(ParseTreeListener):
+
+    # Enter a parse tree produced by week3Parser#start.
+    def enterStart(self, ctx:week3Parser.StartContext):
+        pass
+
+    # Exit a parse tree produced by week3Parser#start.
+    def exitStart(self, ctx:week3Parser.StartContext):
+        pass
+
+
+
+del week3Parser

Week_3/week3Parser.py

@@ -0,0 +1,94 @@
+# Generated from ./week3.g4 by ANTLR 4.13.2
+# encoding: utf-8
+from antlr4 import *
+from io import StringIO
+import sys
+if sys.version_info[1] > 5:
+	from typing import TextIO
+else:
+	from typing.io import TextIO
+
+def serializedATN():
+    return [
+        4,1,3,6,2,0,7,0,1,0,1,0,1,0,1,0,0,0,1,0,0,0,4,0,2,1,0,0,0,2,3,5,
+        1,0,0,3,4,5,2,0,0,4,1,1,0,0,0,0
+    ]
+
+class week3Parser ( Parser ):
+
+    grammarFileName = "week3.g4"
+
+    atn = ATNDeserializer().deserialize(serializedATN())
+
+    decisionsToDFA = [ DFA(ds, i) for i, ds in enumerate(atn.decisionToState) ]
+
+    sharedContextCache = PredictionContextCache()
+
+    literalNames = [ "<INVALID>", "'minimal'" ]
+
+    symbolicNames = [ "<INVALID>", "<INVALID>", "ID", "WS" ]
+
+    RULE_start = 0
+
+    ruleNames =  [ "start" ]
+
+    EOF = Token.EOF
+    T__0=1
+    ID=2
+    WS=3
+
+    def __init__(self, input:TokenStream, output:TextIO = sys.stdout):
+        super().__init__(input, output)
+        self.checkVersion("4.13.2")
+        self._interp = ParserATNSimulator(self, self.atn, self.decisionsToDFA, self.sharedContextCache)
+        self._predicates = None
+
+
+
+
+    class StartContext(ParserRuleContext):
+        __slots__ = 'parser'
+
+        def __init__(self, parser, parent:ParserRuleContext=None, invokingState:int=-1):
+            super().__init__(parent, invokingState)
+            self.parser = parser
+
+        def ID(self):
+            return self.getToken(week3Parser.ID, 0)
+
+        def getRuleIndex(self):
+            return week3Parser.RULE_start
+
+        def enterRule(self, listener:ParseTreeListener):
+            if hasattr( listener, "enterStart" ):
+                listener.enterStart(self)
+
+        def exitRule(self, listener:ParseTreeListener):
+            if hasattr( listener, "exitStart" ):
+                listener.exitStart(self)
+
+
+
+
+    def start(self):
+
+        localctx = week3Parser.StartContext(self, self._ctx, self.state)
+        self.enterRule(localctx, 0, self.RULE_start)
+        try:
+            self.enterOuterAlt(localctx, 1)
+            self.state = 2
+            self.match(week3Parser.T__0)
+            self.state = 3
+            self.match(week3Parser.ID)
+        except RecognitionException as re:
+            localctx.exception = re
+            self._errHandler.reportError(self, re)
+            self._errHandler.recover(self, re)
+        finally:
+            self.exitRule()
+        return localctx
+
+
+
+
+