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https://github.com/DanilaFe/abacus
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Implement unary operators.
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parent
082b2f8783
commit
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@ -30,6 +30,7 @@ public class Operator {
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*/
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public Operator(OperatorAssociativity associativity, OperatorType operatorType, int precedence, Function function){
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this.associativity = associativity;
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this.type = operatorType;
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this.precedence = precedence;
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this.function = function;
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}
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@ -89,7 +89,7 @@ public class StandardPlugin extends Plugin {
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}
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}));
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registerFunction("!", new Function() {
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registerOperator("!", new Operator(OperatorAssociativity.RIGHT, OperatorType.UNARY_POSTFIX, 0, new Function() {
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//private HashMap<Class<? extends NumberInterface>, ArrayList<NumberInterface>> storedList = new HashMap<Class<? extends NumberInterface>, ArrayList<NumberInterface>>();
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@Override
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protected boolean matchesParams(NumberInterface[] params) {
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@ -114,7 +114,7 @@ public class StandardPlugin extends Plugin {
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storedList.get(params[0].getClass()).add(NaiveNumber.ONE.promoteTo(params[0].getClass()));
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}*/
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}
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});
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}));
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registerFunction("abs", new Function() {
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@Override
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@ -33,6 +33,11 @@ public class NumberReducer implements Reducer<NumberInterface> {
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Function function = manager.operatorFor(((OpNode) node).getOperation()).getFunction();
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if(function == null) return null;
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return function.apply(left, right);
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} else if(node instanceof UnaryPrefixNode) {
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NumberInterface child = (NumberInterface) children[0];
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Function functionn = manager.operatorFor(((UnaryPrefixNode) node).getOperation()).getFunction();
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if(functionn == null) return null;
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return functionn.apply(child);
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} else if(node instanceof FunctionNode){
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NumberInterface[] convertedChildren = new NumberInterface[children.length];
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for(int i = 0; i < convertedChildren.length; i++){
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@ -101,9 +101,15 @@ public class TreeBuilder {
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tokenStack.push(match);
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} else if(matchType == TokenType.OP){
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String tokenString = source.substring(match.getFrom(), match.getTo());
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OperatorType type = typeMap.get(tokenString);
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int precedence = precedenceMap.get(tokenString);
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OperatorAssociativity associativity = associativityMap.get(tokenString);
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if(type == OperatorType.UNARY_POSTFIX){
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output.add(match);
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continue;
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}
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while(!tokenStack.empty()) {
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Match<TokenType> otherMatch = tokenStack.peek();
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TokenType otherMatchType = otherMatch.getType();
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@ -151,10 +157,18 @@ public class TreeBuilder {
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Match<TokenType> match = matches.remove(0);
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TokenType matchType = match.getType();
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if(matchType == TokenType.OP){
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TreeNode right = fromStringRecursive(source, matches);
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TreeNode left = fromStringRecursive(source, matches);
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if(left == null || right == null) return null;
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else return new OpNode(source.substring(match.getFrom(), match.getTo()), left, right);
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String operator = source.substring(match.getFrom(), match.getTo());
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OperatorType type = typeMap.get(operator);
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if(type == OperatorType.BINARY_INFIX){
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TreeNode right = fromStringRecursive(source, matches);
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TreeNode left = fromStringRecursive(source, matches);
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if(left == null || right == null) return null;
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else return new OpNode(operator, left, right);
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} else {
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TreeNode applyTo = fromStringRecursive(source, matches);
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if(applyTo == null) return null;
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else return new UnaryPrefixNode(operator, applyTo);
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}
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} else if(matchType == TokenType.NUM){
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return new NumberNode(Double.parseDouble(source.substring(match.getFrom(), match.getTo())));
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} else if(matchType == TokenType.FUNCTION){
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54
src/org/nwapw/abacus/tree/UnaryPrefixNode.java
Normal file
54
src/org/nwapw/abacus/tree/UnaryPrefixNode.java
Normal file
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@ -0,0 +1,54 @@
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package org.nwapw.abacus.tree;
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public class UnaryPrefixNode extends TreeNode {
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/**
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* The operation this node will apply.
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*/
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private String operation;
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/**
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* The tree node to apply the operation to.
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*/
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private TreeNode applyTo;
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/**
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* Creates a new node with the given operation and no child.
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* @param operation the operation for this node.
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*/
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public UnaryPrefixNode(String operation){
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this(operation, null);
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}
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/**
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* Creates a new node with the given operation and child.
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* @param operation the operation for this node.
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* @param applyTo the node to apply the function to.
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*/
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public UnaryPrefixNode(String operation, TreeNode applyTo){
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this.operation = operation;
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this.applyTo = applyTo;
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}
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@Override
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public <T> T reduce(Reducer<T> reducer) {
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Object reducedChild = applyTo.reduce(reducer);
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if(reducedChild == null) return null;
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return reducer.reduceNode(this, reducedChild);
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}
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/**
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* Gets the operation of this node.
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* @return the operation this node performs.
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*/
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public String getOperation() {
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return operation;
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}
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/**
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* Gets the node to which this node's operation applies.
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* @return the tree node to which the operation will be applied.
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*/
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public TreeNode getApplyTo() {
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return applyTo;
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}
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}
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