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Code Issues Releases Wiki Activity

Implement the negation operator.

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This commit is contained in:
Danila Fedorin
2017-08-02 11:26:59 -07:00
parent 31a4234d9b
commit 046764eeca
3 changed files with 30 additions and 6 deletions
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17
src/main/java/org/nwapw/abacus/plugin/StandardPlugin.java
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@@ -52,6 +52,20 @@ public class StandardPlugin extends Plugin {
return params[0].subtract(params[1]);
}
});
/**
* The negation operator, -
*/
public static final Operator OP_NEGATE = new Operator(OperatorAssociativity.LEFT, OperatorType.UNARY_PREFIX, 0, new Function() {
@Override
protected boolean matchesParams(NumberInterface[] params) {
return params.length == 1;
}
@Override
protected NumberInterface applyInternal(NumberInterface[] params) {
return params[0].negate();
}
});
/**
* The multiplication operator, *
*/
@@ -317,6 +331,7 @@ public class StandardPlugin extends Plugin {
registerOperator("+", OP_ADD);
registerOperator("-", OP_SUBTRACT);
registerOperator("`", OP_NEGATE);
registerOperator("*", OP_MULTIPLY);
registerOperator("/", OP_DIVIDE);
registerOperator("^", OP_CARET);
@@ -335,7 +350,7 @@ public class StandardPlugin extends Plugin {
public static NumberInterface factorial(Class<? extends NumberInterface> numberClass, int n){
if(!factorialLists.containsKey(numberClass)){
factorialLists.put(numberClass, new ArrayList<NumberInterface>());
factorialLists.put(numberClass, new ArrayList<>());
factorialLists.get(numberClass).add(NaiveNumber.ONE.promoteTo(numberClass));
factorialLists.get(numberClass).add(NaiveNumber.ONE.promoteTo(numberClass));
}