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

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
+
+