task 6 in progress!

Triangle.Compiler/.project

@@ -20,4 +20,11 @@
 		<nature>org.eclipse.jdt.core.javanature</nature>
 		<nature>org.eclipse.buildship.core.gradleprojectnature</nature>
 	</natures>
+	<linkedResources>
+		<link>
+			<name>programs</name>
+			<type>2</type>
+			<location>/home/simon/Documents/Uni/CS/CSCU9A5-2/Ass1/src/a5-triangle-tools/programs</location>
+		</link>
+	</linkedResources>
 </projectDescription>

Triangle.Compiler/src/main/java/triangle/abstractSyntaxTrees/commands/LoopWhile.java

@@ -0,0 +1,41 @@
+/*
+ * @(#)WhileCommand.java                       
+ * 
+ * Revisions and updates (c) 2022-2023 Sandy Brownlee. alexander.brownlee@stir.ac.uk
+ * 
+ * Original release:
+ *
+ * Copyright (C) 1999, 2003 D.A. Watt and D.F. Brown
+ * Dept. of Computing Science, University of Glasgow, Glasgow G12 8QQ Scotland
+ * and School of Computer and Math Sciences, The Robert Gordon University,
+ * St. Andrew Street, Aberdeen AB25 1HG, Scotland.
+ * All rights reserved.
+ *
+ * This software is provided free for educational use only. It may
+ * not be used for commercial purposes without the prior written permission
+ * of the authors.
+ */
+
+package triangle.abstractSyntaxTrees.commands;
+
+import triangle.abstractSyntaxTrees.expressions.Expression;
+import triangle.abstractSyntaxTrees.visitors.CommandVisitor;
+import triangle.syntacticAnalyzer.SourcePosition;
+
+public class LoopWhile extends Command {
+
+	public LoopWhile(Expression eAST,Command c1AST, Command c2AST, SourcePosition position) {
+		super(position);
+		E = eAST;
+		C1 = c1AST;
+		C2 = c2AST;
+	}
+	
+	public <TArg, TResult> TResult visit(CommandVisitor<TArg, TResult> v, TArg arg) {
+		return v.visitLoopWhile(this, arg);
+	}
+
+	public Expression E;
+	public final Command C1;
+	public final Command C2;
+}

Triangle.Compiler/src/main/java/triangle/abstractSyntaxTrees/visitors/CommandVisitor.java

@@ -5,6 +5,7 @@ import triangle.abstractSyntaxTrees.commands.CallCommand;
 import triangle.abstractSyntaxTrees.commands.EmptyCommand;
 import triangle.abstractSyntaxTrees.commands.IfCommand;
 import triangle.abstractSyntaxTrees.commands.LetCommand;
+import triangle.abstractSyntaxTrees.commands.LoopWhile;
 import triangle.abstractSyntaxTrees.commands.SequentialCommand;
 import triangle.abstractSyntaxTrees.commands.WhileCommand;
 
@@ -24,4 +25,6 @@ public interface CommandVisitor<TArg, TResult> {
 
 	TResult visitWhileCommand(WhileCommand ast, TArg arg);
 
+	TResult visitLoopWhile(LoopWhile loopWhile, TArg arg);
+
 }

Triangle.Compiler/src/main/java/triangle/codeGenerator/Encoder.java

@@ -42,6 +42,7 @@ import triangle.abstractSyntaxTrees.commands.CallCommand;
 import triangle.abstractSyntaxTrees.commands.EmptyCommand;
 import triangle.abstractSyntaxTrees.commands.IfCommand;
 import triangle.abstractSyntaxTrees.commands.LetCommand;
+import triangle.abstractSyntaxTrees.commands.LoopWhile;
 import triangle.abstractSyntaxTrees.commands.SequentialCommand;
 import triangle.abstractSyntaxTrees.commands.WhileCommand;
 import triangle.abstractSyntaxTrees.declarations.BinaryOperatorDeclaration;
@@ -793,4 +794,10 @@ public final class Encoder implements ActualParameterVisitor<Frame, Integer>,
 		var baseObject = (AddressableEntity) V.visit(this, frame);
 		baseObject.encodeFetchAddress(emitter, frame, V);
 	}
+
+	@Override
+	public Void visitLoopWhile(LoopWhile loopWhile, Frame arg) {
+		// TODO Auto-generated method stub
+		return null;
+	}
 }

Triangle.Compiler/src/main/java/triangle/contextualAnalyzer/Checker.java

@@ -38,6 +38,7 @@ import triangle.abstractSyntaxTrees.commands.CallCommand;
 import triangle.abstractSyntaxTrees.commands.EmptyCommand;
 import triangle.abstractSyntaxTrees.commands.IfCommand;
 import triangle.abstractSyntaxTrees.commands.LetCommand;
+import triangle.abstractSyntaxTrees.commands.LoopWhile;
 import triangle.abstractSyntaxTrees.commands.SequentialCommand;
 import triangle.abstractSyntaxTrees.commands.WhileCommand;
 import triangle.abstractSyntaxTrees.declarations.BinaryOperatorDeclaration;
@@ -981,4 +982,10 @@ public final class Checker implements ActualParameterVisitor<FormalParameter, Vo
 				StdEnvironment.booleanType);
 
 	}
+
+	@Override
+	public Void visitLoopWhile(LoopWhile loopWhile, Void arg) {
+		// TODO Auto-generated method stub
+		return null;
+	}
 }

Triangle.Compiler/src/main/java/triangle/optimiser/ConstantFolder.java

@@ -19,6 +19,7 @@ import triangle.abstractSyntaxTrees.commands.CallCommand;
 import triangle.abstractSyntaxTrees.commands.EmptyCommand;
 import triangle.abstractSyntaxTrees.commands.IfCommand;
 import triangle.abstractSyntaxTrees.commands.LetCommand;
+import triangle.abstractSyntaxTrees.commands.LoopWhile;
 import triangle.abstractSyntaxTrees.commands.SequentialCommand;
 import triangle.abstractSyntaxTrees.commands.WhileCommand;
 import triangle.abstractSyntaxTrees.declarations.BinaryOperatorDeclaration;
@@ -596,4 +597,10 @@ public class ConstantFolder implements ActualParameterVisitor<Void, AbstractSynt
 		return null;
 	}
 
+	@Override
+	public AbstractSyntaxTree visitLoopWhile(LoopWhile loopWhile, Void arg) {
+		// TODO Auto-generated method stub
+		return null;
+	}
+
 }

Triangle.Compiler/src/main/java/triangle/optimiser/SummaryStats.java

@@ -19,6 +19,7 @@ import triangle.abstractSyntaxTrees.commands.CallCommand;
 import triangle.abstractSyntaxTrees.commands.EmptyCommand;
 import triangle.abstractSyntaxTrees.commands.IfCommand;
 import triangle.abstractSyntaxTrees.commands.LetCommand;
+import triangle.abstractSyntaxTrees.commands.LoopWhile;
 import triangle.abstractSyntaxTrees.commands.SequentialCommand;
 import triangle.abstractSyntaxTrees.commands.WhileCommand;
 import triangle.abstractSyntaxTrees.declarations.BinaryOperatorDeclaration;
@@ -611,4 +612,10 @@ public class SummaryStats implements ActualParameterVisitor<Void, AbstractSyntax
 		return null;
 	}
 
+	@Override
+	public AbstractSyntaxTree visitLoopWhile(LoopWhile loopWhile, Void arg) {
+		// TODO Auto-generated method stub
+		return null;
+	}
+
 }

Triangle.Compiler/src/main/java/triangle/syntacticAnalyzer/Parser.java

@@ -41,6 +41,7 @@ import triangle.abstractSyntaxTrees.commands.Command;
 import triangle.abstractSyntaxTrees.commands.EmptyCommand;
 import triangle.abstractSyntaxTrees.commands.IfCommand;
 import triangle.abstractSyntaxTrees.commands.LetCommand;
+import triangle.abstractSyntaxTrees.commands.LoopWhile;
 import triangle.abstractSyntaxTrees.commands.SequentialCommand;
 import triangle.abstractSyntaxTrees.commands.WhileCommand;
 import triangle.abstractSyntaxTrees.declarations.ConstDeclaration;
@@ -357,6 +358,29 @@ public class Parser {
 			accept(Token.RCURLY);
 			break;
 			
+		//Task 6
+		case Token.LOOP: {
+			acceptIt();
+			
+			accept(Token.BEGIN);
+			Command c1AST = parseCommand(); //C1 = LOOP
+			accept(Token.END);
+			
+			System.out.println("c1AST: " + c1AST.getPosition());
+			
+			accept(Token.WHILE);
+			Expression eAST = parseExpression(); //E = WHILE
+			System.out.println("eAST: " + eAST.getPosition());
+			
+			accept(Token.DO);
+			Command c2AST = parseSingleCommand(); //C2 = DO
+			System.out.println("c2AST: " + c2AST.getPosition());
+			
+			finish(commandPos);
+			commandAST = new LoopWhile(eAST, c1AST, c2AST, commandPos);
+		}
+			break;
+
 		case Token.SEMICOLON:
 		case Token.END:
 		case Token.ELSE:

Triangle.Compiler/src/main/java/triangle/syntacticAnalyzer/Token.java

@@ -67,20 +67,20 @@ final class Token extends Object {
 	INTLITERAL = 0, CHARLITERAL = 1, IDENTIFIER = 2, OPERATOR = 3,
 
 			// reserved words - must be in alphabetical order...
-			ARRAY = 4, BEGIN = 5, CONST = 6, DO = 7, ELSE = 8, END = 9, FUNC = 10, IF = 11, IN = 12, LET = 13, OF = 14,
+			ARRAY = 4, BEGIN = 5, CONST = 6, DO = 7, ELSE = 8, END = 9, FUNC = 10, IF = 11, IN = 12, LET = 13, LOOP = 14, OF = 15,
-			PROC = 15, RECORD = 16, THEN = 17, TYPE = 18, VAR = 19, WHILE = 20,
+			PROC = 16, RECORD = 17, THEN = 18, TYPE = 19, VAR = 20, WHILE = 21,
 
 			// punctuation...
-			DOT = 21, COLON = 22, SEMICOLON = 23, COMMA = 24, BECOMES = 25, IS = 26,
+			DOT = 22, COLON = 23, SEMICOLON = 24, COMMA = 25, BECOMES = 26, IS = 27,
 
 			// brackets...
-			LPAREN = 27, RPAREN = 28, LBRACKET = 29, RBRACKET = 30, LCURLY = 31, RCURLY = 32,
+			LPAREN = 28, RPAREN = 29, LBRACKET = 30, RBRACKET = 31, LCURLY = 32, RCURLY = 33,
 
 			// special tokens...
-			EOT = 33, ERROR = 34;
+			EOT = 34, ERROR = 35;
 
 	private static String[] tokenTable = new String[] { "<int>", "<char>", "<identifier>", "<operator>", "array",
-			"begin", "const", "do", "else", "end", "func", "if", "in", "let", "of", "proc", "record", "then", "type",
+			"begin", "const", "do", "else", "end", "func", "if", "in", "let", "loop", "of", "proc", "record", "then", "type",
 			"var", "while", ".", ":", ";", ",", ":=", "~", "(", ")", "[", "]", "{", "}", "", "<error>" };
 
 	private final static int firstReservedWord = Token.ARRAY, lastReservedWord = Token.WHILE;

Triangle.Compiler/src/main/java/triangle/treeDrawer/LayoutVisitor.java

@@ -37,6 +37,7 @@ import triangle.abstractSyntaxTrees.commands.CallCommand;
 import triangle.abstractSyntaxTrees.commands.EmptyCommand;
 import triangle.abstractSyntaxTrees.commands.IfCommand;
 import triangle.abstractSyntaxTrees.commands.LetCommand;
+import triangle.abstractSyntaxTrees.commands.LoopWhile;
 import triangle.abstractSyntaxTrees.commands.SequentialCommand;
 import triangle.abstractSyntaxTrees.commands.WhileCommand;
 import triangle.abstractSyntaxTrees.declarations.BinaryOperatorDeclaration;
@@ -681,4 +682,10 @@ public class LayoutVisitor implements ActualParameterVisitor<Void, DrawingTree>,
 		return r;
 	}
 
+	@Override
+	public DrawingTree visitLoopWhile(LoopWhile loopWhile, Void arg) {
+		// TODO Auto-generated method stub
+		return null;
+	}
+
 }

programs/checkstats.tri

@@ -2,17 +2,11 @@ let
     var a : Integer;
     var b : Integer;
     var c : Integer;
-
     var x : Char;
     var y : Char
 in
     {
-        a := 1;
+        a := 1; b := 2; a**;
-        b := 2;
-        a**;
-
         b := 100;
-
+        x := 'A'; y := 'Z';
-        x := 'A';
-        y := 'Z';
     }

programs/loopwhile.tri

@@ -0,0 +1,16 @@
+! print out ababababa
+
+let
+  var a : Integer
+in
+begin
+  a := 0;
+  loop
+  begin
+    put('a');
+    a := a + 1;
+  end
+  while a < 5 do
+  	put('b');
+  
+end