Add initial implementation of RobotLang interpreter and visitor pattern

Q1/Artefacts/RobotLangVisitorUser.py

@@ -0,0 +1,43 @@
+from antlr4 import *
+if "." in __name__:
+    from .RobotLangParser import RobotLangParser
+else:
+    from RobotLangParser import RobotLangParser
+
+class RobotLangVisitorUser(RobotLangVisitor):
+    def __init__(self, student_id="2320390"):
+        self.student_id = student_id
+
+    def visitMoveStat(self, ctx):
+        val = ctx.NUMBER().getText()
+        print(f"{self.student_id} is moving by {val}.")
+        return self.visitChildren(ctx)
+
+    def visitGrabStat(self, ctx):
+        print(f"{self.student_id} is grabbing.")
+        return self.visitChildren(ctx)
+
+    def visitReleaseStat(self, ctx):
+        print(f"{self.student_id} is releasing.")
+        return self.visitChildren(ctx)
+
+    def visitWaitStat(self, ctx):
+        val = ctx.NUMBER().getText()
+        print(f"{self.student_id} is waiting for {val}.")
+        return self.visitChildren(ctx)
+
+    def visitLogStat(self, ctx):
+        val = ctx.STRING().getText()
+        print(f"{self.student_id} is logging: {val}.")
+        return self.visitChildren(ctx)
+
+    def visitRepeatStat(self, ctx):
+        times = int(ctx.NUMBER().getText())
+        for _ in range(times):
+            # Visit all statements inside the repeat block
+            for stat_ctx in ctx.stat():
+                self.visit(stat_ctx)
+        return None
+
+
+del RobotLangParser