add variables

src/main/java/org/nwapw/abacus/number/Variable.java

@@ -0,0 +1,102 @@
+package org.nwapw.abacus.number;
+
+public class Variable extends NumberInterface{
+    public NumberInterface value;
+    public String variable;
+
+    public Variable(NumberInterface value,String variable){
+        this.value = value;
+        this.variable = variable;
+    }
+    public String getVariable(){
+        return variable;
+    }
+
+    @Override
+    public NumberInterface number(){
+        return value.number();
+    }
+
+    @Override
+    public Class<? extends NumberInterface> getClassVal(){
+        return value.getClassVal();
+    }
+
+    @Override
+    public int getMaxPrecision() {
+        return value.getMaxPrecision();
+    }
+
+    @Override
+    protected NumberInterface multiplyInternal(NumberInterface multiplier) {
+        value = value.promoteToInternal(multiplier.number().getClass());
+        return value.multiplyInternal(multiplier.number());
+    }
+
+    @Override
+    protected NumberInterface divideInternal(NumberInterface divisor) {
+        value = value.promoteToInternal(divisor.number().getClass());
+        return value.divideInternal(divisor.number());
+    }
+
+    @Override
+    protected NumberInterface addInternal(NumberInterface summand) {
+        value = value.promoteToInternal(summand.number().getClass());
+        return value.addInternal(summand.number());
+    }
+
+    @Override
+    protected NumberInterface subtractInternal(NumberInterface subtrahend) {
+        value = value.promoteToInternal(subtrahend.number().getClass());
+        return value.subtractInternal(subtrahend.number());
+    }
+
+    @Override
+    protected NumberInterface negateInternal() {
+        return value.negateInternal();
+    }
+
+    @Override
+    protected NumberInterface intPowInternal(int exponent) {
+        return value.intPowInternal(exponent);
+    }
+
+    @Override
+    public int compareTo(NumberInterface number) {
+        value = value.promoteToInternal(number.number().getClass());
+        return value.compareTo(number.number());
+    }
+
+    @Override
+    public int signum() {
+        return value.signum();
+    }
+
+    @Override
+    protected NumberInterface ceilingInternal() {
+        return value.ceilingInternal();
+    }
+
+    @Override
+    protected NumberInterface floorInternal() {
+        return value.floorInternal();
+    }
+
+    @Override
+    protected NumberInterface fractionalPartInternal() {
+        return value.fractionalPartInternal();
+    }
+
+    @Override
+    public int intValue() {
+        return value.intValue();
+    }
+
+    @Override
+    protected NumberInterface promoteToInternal(Class<? extends NumberInterface> toClass) {
+        return value.promoteToInternal(toClass);
+    }
+    public String toString(){
+        return value.toString();
+    }
+}

src/main/java/org/nwapw/abacus/plugin/VariablePlugin.java

@@ -0,0 +1,52 @@
+package org.nwapw.abacus.plugin;
+
+import org.nwapw.abacus.function.Function;
+import org.nwapw.abacus.function.Operator;
+import org.nwapw.abacus.function.OperatorAssociativity;
+import org.nwapw.abacus.function.OperatorType;
+import org.nwapw.abacus.number.NumberInterface;
+import org.nwapw.abacus.number.Variable;
+
+import java.lang.reflect.Method;
+import java.util.HashMap;
+
+public class VariablePlugin extends Plugin {
+    private HashMap<String,NumberInterface> variableMap;
+    public final Operator OP_EQUALS = new Operator(OperatorAssociativity.LEFT, OperatorType.BINARY_INFIX, -1, new Function() {
+        //private HashMap<Class<? extends NumberInterface>, ArrayList<NumberInterface>> storedList = new HashMap<Class<? extends NumberInterface>, ArrayList<NumberInterface>>();
+        @Override
+        protected boolean matchesParams(NumberInterface[] params) {
+            return params.length == 2;
+        }
+
+        @Override
+        protected NumberInterface applyInternal(NumberInterface[] params) {
+            //System.out.println((char)Double.parseDouble(params[1].toString()));
+            //System.out.println(params[0].toString());
+            if (params[0] instanceof Variable){
+                variableMap.put(((Variable) params[0]).getVariable(), params[1]);
+            }
+            return params[1];
+        }
+    });
+    public NumberInterface getValue(String variable){
+        return variableMap.get(variable);
+    }
+    public VariablePlugin(PluginManager manager) {
+        super(manager);
+        //variables = new ArrayList<>();
+        variableMap=new HashMap<>();
+    }
+
+    
+    @Override
+    public void onEnable(){
+        //variables = new ArrayList<>();
+        variableMap=new HashMap<>();
+        registerOperator("=",OP_EQUALS);
+    }
+    @Override
+    public void onDisable(){
+
+    }
+};

src/main/java/org/nwapw/abacus/tree/VariableNode.java

@@ -0,0 +1,24 @@
+package org.nwapw.abacus.tree;
+
+import org.nwapw.abacus.number.NumberInterface;
+
+public class VariableNode extends TreeNode{
+    private String variable;
+    public VariableNode() {
+        variable = null;
+    }
+    public VariableNode(String name){
+        this.variable = name;
+    }
+    public String getVariable() {
+        return variable;
+    }
+    @Override
+    public <T> T reduce(Reducer<T> reducer) {
+        return reducer.reduceNode(this);
+    }
+    @Override
+    public String toString() {
+        return variable;
+    }
+}