From 50dd5dc0caa4e37a37123845cb2f8cf02a7dd945 Mon Sep 17 00:00:00 2001 From: Jan Tuomi Date: Tue, 21 Jun 2016 21:37:09 +0300 Subject: Add negation operator --- main/core/parser/ast/NegationNode.java | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 main/core/parser/ast/NegationNode.java (limited to 'main/core/parser/ast/NegationNode.java') diff --git a/main/core/parser/ast/NegationNode.java b/main/core/parser/ast/NegationNode.java new file mode 100644 index 0000000..ec3be2a --- /dev/null +++ b/main/core/parser/ast/NegationNode.java @@ -0,0 +1,34 @@ +package com.jantuomi.interpreter.main.core.parser.ast; + +import com.jantuomi.interpreter.main.core.parser.datatype.BooleanDataContainer; +import com.jantuomi.interpreter.main.core.parser.datatype.DataContainer; +import com.jantuomi.interpreter.main.core.parser.datatype.IntegerDataContainer; +import com.jantuomi.interpreter.main.core.tokenizer.token.Token; +import com.jantuomi.interpreter.main.exception.ExceptionManager; +import com.jantuomi.interpreter.main.exception.InterpreterException; + +/** + * Created by jan on 21.6.2016. + */ +public class NegationNode extends UnaryOperatorNode { + public NegationNode(Token token, ASTNode operand) { + super(token, operand); + } + + @Override + public DataContainer evaluate() throws InterpreterException { + DataContainer d = getOperand().evaluate(); + + if (d instanceof BooleanDataContainer) { + return new BooleanDataContainer(!((BooleanDataContainer) d).getData()); + } + else if (d instanceof IntegerDataContainer) { + return new BooleanDataContainer( + ((IntegerDataContainer) d).getData() != 0 + ); + } + ExceptionManager.raise(InterpreterException.ExceptionType.TypeError, -1, "not", d.toString()); + return null; + + } +} -- cgit v1.3