Enhance RobotLang grammar and visitor to support student ID extraction

.idea/git_toolbox_prj.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="GitToolBoxProjectSettings">
+    <option name="commitMessageIssueKeyValidationOverride">
+      <BoolValueOverride>
+        <option name="enabled" value="true" />
+      </BoolValueOverride>
+    </option>
+    <option name="commitMessageValidationEnabledOverride">
+      <BoolValueOverride>
+        <option name="enabled" value="true" />
+      </BoolValueOverride>
+    </option>
+  </component>
+</project>

Q1/Artefacts/RobotLang.g4

@@ -1,7 +1,7 @@
 grammar RobotLang;
 
-prog: stat+ ;
+prog: header stat+ ;
-
+header: ID_PREFIX NUMBER ;
 stat: moveStat
     | grabStat
     | releaseStat
@@ -17,6 +17,7 @@ waitStat: 'WAIT' NUMBER ';' ;
 logStat: 'LOG' STRING ';' ;
 repeatStat: 'REPEAT' NUMBER '{' stat+ '}' ;
 
+ID_PREFIX: '// STUDENT ID:' ;
 NUMBER: [0-9]+ ;
-STRING: '"' .*? '"' ;
+STRING: '"' .*? '"' {self.text = self.text[1:-1]} ;
 WS: [ \t\r\n]+ -> skip ;

Q1/Artefacts/RobotLangVisitorUser.py

@@ -1,8 +1,14 @@
 from RobotLangVisitor import RobotLangVisitor
 
 class RobotLangVisitorUser(RobotLangVisitor):
-    def __init__(self, student_id="2320390"):
+    def __init__(self):
-        self.student_id = student_id
+        self.student_id = "Unknown"
+
+    def visitHeader(self, ctx):
+        # Extract the number directly from the script
+        self.student_id = ctx.NUMBER().getText()
+        # Continue walking the rest of the tree
+        return self.visitChildren(ctx)
 
     def visitMoveStat(self, ctx):
         val = ctx.NUMBER().getText()

Q1/Artefacts/main.py

@@ -9,22 +9,18 @@ def main(argv):
     if len(argv) == 1:
         inpstream = StdinStream()
     else:
-        inpname = argv[9]
+        inpname = argv[1]
         inpstream = FileStream(inpname)
-    # 1. Lexer analyses the characters
+    # Lexer analyses the characters
     lexer = RobotLangLexer(inpstream)
-    # 2. Create a stream of tokens
+    # Create a stream of tokens
     tokstream = CommonTokenStream(lexer)
-    # 3. Parser produces the abstract syntax tree
+    # Parser produces the abstract syntax tree
     parser = RobotLangParser(tokstream)
-    # 4. Start parsing from the top rule ('prog' in your grammar)
+    # Start parsing from the top rule
     tree = parser.prog()
 
-    # Printing the parse tree using Marina's PrettyPrint and toStringTree methods (Not-needed for the assignment)
+    visitor = RobotLangVisitorUser()
-    # print(TreesUser.toStringTree(tree, None, parser))
-    # print(TreesUser.PrettyPrint(tree, None, parser))
-
-    visitor = RobotLangVisitorUser("2320390")
     visitor.visit(tree)
 
 if __name__ == '__main__':