repeatuntil works

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

@@ -185,6 +185,10 @@ public final class Encoder implements ActualParameterVisitor<Frame, Integer>,
 	
 	@Override
 	public Void visitRepeatCommand(RepeatCommand ast, Frame frame) {
+		var loopAddr = emitter.getNextInstrAddr();
+		ast.E.visit(this, frame);
+		ast.C.visit(this, frame);
+		emitter.emit(OpCode.JUMPIF, Machine.trueRep, Register.CB, loopAddr);
 		return null;
 	}
 

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

@@ -188,6 +188,10 @@ public final class Checker implements ActualParameterVisitor<FormalParameter, Vo
 	
 	@Override
 	public Void visitRepeatCommand(RepeatCommand ast, Void arg) {
+		var eType = ast.E.visit(this);
+
+		checkAndReportError(eType.equals(StdEnvironment.booleanType), "Boolean expression expected here", ast.E);
+		ast.C.visit(this);
 		return null;
 	}