end of practical 2

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

@@ -0,0 +1,21 @@
+package triangle.abstractSyntaxTrees.commands;
+
+import triangle.abstractSyntaxTrees.expressions.Expression;
+import triangle.abstractSyntaxTrees.visitors.CommandVisitor;
+import triangle.syntacticAnalyzer.SourcePosition;
+
+public class RepeatCommand extends Command {
+
+	public RepeatCommand(Expression eAST, Command cAST, SourcePosition position) {
+		super(position);
+		E = eAST;
+		C = cAST;
+	}
+
+	public <TArg, TResult> TResult visit(CommandVisitor<TArg, TResult> v, TArg arg) {
+		return v.visitRepeatCommand(this, arg);
+	}
+
+	public final Expression E;
+	public final Command C;
+}

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

@@ -5,11 +5,11 @@ import triangle.abstractSyntaxTrees.commands.CallCommand;
 import triangle.abstractSyntaxTrees.commands.EmptyCommand;
 import triangle.abstractSyntaxTrees.commands.IfCommand;
 import triangle.abstractSyntaxTrees.commands.LetCommand;
+import triangle.abstractSyntaxTrees.commands.RepeatCommand;
 import triangle.abstractSyntaxTrees.commands.SequentialCommand;
 import triangle.abstractSyntaxTrees.commands.WhileCommand;
 
 public interface CommandVisitor<TArg, TResult> {
-
 	TResult visitAssignCommand(AssignCommand ast, TArg arg);
 
 	TResult visitCallCommand(CallCommand ast, TArg arg);
@@ -23,5 +23,7 @@ public interface CommandVisitor<TArg, TResult> {
 	TResult visitSequentialCommand(SequentialCommand ast, TArg arg);
 
 	TResult visitWhileCommand(WhileCommand ast, TArg arg);
+	
+	TResult visitRepeatCommand(RepeatCommand ast, TArg arg);
 
-}
+}

Triangle.Compiler/src/main/java/triangle/codeGenerator/Encoder.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.RepeatCommand;
 import triangle.abstractSyntaxTrees.commands.SequentialCommand;
 import triangle.abstractSyntaxTrees.commands.WhileCommand;
 import triangle.abstractSyntaxTrees.declarations.BinaryOperatorDeclaration;
@@ -180,6 +181,11 @@ public final class Encoder implements ActualParameterVisitor<Frame, Integer>,
 		emitter.emit(OpCode.JUMPIF, Machine.trueRep, Register.CB, loopAddr);
 		return null;
 	}
+	
+	@Override
+	public Void visitRepeatCommand(RepeatCommand ast, Frame frame) {
+		return null;
+	}
 
 	// Expressions
 	@Override

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

@@ -34,6 +34,7 @@ import triangle.abstractSyntaxTrees.commands.CallCommand;
 import triangle.abstractSyntaxTrees.commands.EmptyCommand;
 import triangle.abstractSyntaxTrees.commands.IfCommand;
 import triangle.abstractSyntaxTrees.commands.LetCommand;
+import triangle.abstractSyntaxTrees.commands.RepeatCommand;
 import triangle.abstractSyntaxTrees.commands.SequentialCommand;
 import triangle.abstractSyntaxTrees.commands.WhileCommand;
 import triangle.abstractSyntaxTrees.declarations.BinaryOperatorDeclaration;
@@ -184,6 +185,11 @@ public final class Checker implements ActualParameterVisitor<FormalParameter, Vo
 
 		return null;
 	}
+	
+	@Override
+	public Void visitRepeatCommand(RepeatCommand ast, Void arg) {
+		return null;
+	}
 
 	// Expressions
 

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

@@ -37,6 +37,7 @@ import triangle.abstractSyntaxTrees.commands.Command;
 import triangle.abstractSyntaxTrees.commands.EmptyCommand;
 import triangle.abstractSyntaxTrees.commands.IfCommand;
 import triangle.abstractSyntaxTrees.commands.LetCommand;
+import triangle.abstractSyntaxTrees.commands.RepeatCommand;
 import triangle.abstractSyntaxTrees.commands.SequentialCommand;
 import triangle.abstractSyntaxTrees.commands.WhileCommand;
 import triangle.abstractSyntaxTrees.declarations.ConstDeclaration;
@@ -320,7 +321,7 @@ public class Parser {
 		}
 			break;
 
-		case Token.WHILE: {
+		case Token.WHILE: { //while expr. do command
 			acceptIt();
 			Expression eAST = parseExpression();
 			accept(Token.DO);
@@ -330,6 +331,16 @@ public class Parser {
 		}
 			break;
 
+		case Token.REPEAT: { //repeat command until expr.
+			acceptIt(); 
+			Command cAST = parseSingleCommand();
+			accept(Token.UNTIL); 		//check that there is a "until"
+			Expression eAST = parseExpression();
+			finish(commandPos); 
+			commandAST = new RepeatCommand(eAST, cAST, commandPos); 
+		}
+			break;
+			
 		case Token.SEMICOLON:
 		case Token.END:
 		case Token.ELSE:

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

@@ -35,7 +35,7 @@ public final class Scanner {
 
 	private boolean isOperator(char c) {
 		return (c == '+' || c == '-' || c == '*' || c == '/' || c == '=' || c == '<' || c == '>' || c == '\\'
-				|| c == '&' || c == '@' || c == '%' || c == '^' || c == '?');
+				|| c == '&' || c == '@' || c == '%' || c == '^' || c == '?' || c == '|');
 	}
 
 	///////////////////////////////////////////////////////////////////////////////
@@ -64,7 +64,7 @@ public final class Scanner {
 	private void scanSeparator() {
 		switch (currentChar) {
 		
-		// comment
+		// ! comment
 		case '!': {
 			takeIt();
 			while ((currentChar != SourceFile.EOL) && (currentChar != SourceFile.EOT))
@@ -199,6 +199,13 @@ public final class Scanner {
 			while (isOperator(currentChar))
 				takeIt();
 			return Token.OPERATOR;
+			
+		// TODO: Bar operator, week 3
+		case '|':
+			takeIt();
+			while(isOperator(currentChar))
+				takeIt();
+		return Token.OPERATOR;
 
 		case '\'':
 			takeIt();

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

@@ -64,20 +64,20 @@ final class Token extends Object {
 
 			// 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,
-			PROC = 15, RECORD = 16, THEN = 17, TYPE = 18, VAR = 19, WHILE = 20,
+			PROC = 15, RECORD = 16, REPEAT = 17, THEN = 18, TYPE = 19, UNTIL = 20, VAR = 21, WHILE = 22,
 
 			// punctuation...
-			DOT = 21, COLON = 22, SEMICOLON = 23, COMMA = 24, BECOMES = 25, IS = 26,
+			DOT = 23, COLON = 24, SEMICOLON = 25, COMMA = 26, BECOMES = 27, IS = 28,
 
 			// brackets...
-			LPAREN = 27, RPAREN = 28, LBRACKET = 29, RBRACKET = 30, LCURLY = 31, RCURLY = 32,
+			LPAREN = 29, RPAREN = 30, LBRACKET = 31, RBRACKET = 32, LCURLY = 33, RCURLY = 34,
 
 			// special tokens...
-			EOT = 33, ERROR = 34;
+			EOT = 35, ERROR = 36;
 
 	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",
-			"var", "while", ".", ":", ";", ",", ":=", "~", "(", ")", "[", "]", "{", "}", "", "<error>" };
+			"begin", "const", "do", "else", "end", "func", "if", "in", "let", "of", "proc", "record", "repeat", "then", "type",
+			"until", "var", "while", ".", ":", ";", ",", ":=", "~", "(", ")", "[", "]", "{", "}", "", "<error>" };
 
 	private final static int firstReservedWord = Token.ARRAY, lastReservedWord = Token.WHILE;
 

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

@@ -33,6 +33,7 @@ import triangle.abstractSyntaxTrees.commands.CallCommand;
 import triangle.abstractSyntaxTrees.commands.EmptyCommand;
 import triangle.abstractSyntaxTrees.commands.IfCommand;
 import triangle.abstractSyntaxTrees.commands.LetCommand;
+import triangle.abstractSyntaxTrees.commands.RepeatCommand;
 import triangle.abstractSyntaxTrees.commands.SequentialCommand;
 import triangle.abstractSyntaxTrees.commands.WhileCommand;
 import triangle.abstractSyntaxTrees.declarations.BinaryOperatorDeclaration;
@@ -158,6 +159,11 @@ public class LayoutVisitor implements ActualParameterVisitor<Void, DrawingTree>,
 		var d2 = ast.C.visit(this);
 		return layoutBinary("WhileCom.", d1, d2);
 	}
+	
+	@Override
+	public DrawingTree visitRepeatCommand(RepeatCommand ast, Void obj) {
+		return null;
+	}
 
 	// Expressions
 	@Override

Triangle.Compiler/src/test/java/triangle/syntacticAnalyser/TestScanner.java

@@ -34,13 +34,13 @@ public class TestScanner {
 
 	@Test
 	public void testBarDemo() {
-		compileExpectFailure("/bardemo.tri");
+		compileExpectSuccess("/bardemo.tri"); //TODO: Change this to failure
 	}
 	
 
 	@Test
 	public void testRepeatUntil() {
-		compileExpectFailure("/repeatuntil.tri");
+		compileExpectSuccess("/repeatuntil.tri");
 	}
 	
 	@Test