@specs-feup/kadabra/api/kadabra/mutation/BinaryExpressionMutator.js

A Java source-to-source compiler written in Typescript

import Mutator from "@specs-feup/lara/api/lara/mutation/Mutator.js";
/**
 *  @param binaryExpression - A join point of type binaryExpression.
 *  @param newOperators - Operators that will be used to mutate the given binaryExpression.
 */
export default class BinaryExpressionMutator extends Mutator {
    binaryExpression;
    newOperators;
    currentIndex;
    previousOp;
    constructor(binaryExpression, ...newOperators) {
        super();
        // Instance variables
        this.binaryExpression = binaryExpression;
        this.newOperators = newOperators;
        this.currentIndex = 0;
        this.previousOp = undefined;
        // Checks
        // TODO: Check if operators are valid
    }
    hasMutations() {
        return this.currentIndex < this.newOperators.length;
    }
    getMutationPoint() {
        return this.binaryExpression;
    }
    mutatePrivate() {
        // Obtain new operator, increment index
        const newOp = this.newOperators[this.currentIndex];
        this.currentIndex++;
        // Store current operator
        this.previousOp = this.binaryExpression.operator;
        // Set new operator
        this.binaryExpression.operator = newOp;
    }
    restorePrivate() {
        // Restore operator
        if (this.previousOp === undefined) {
            throw new Error("PreviousOp is undefined.");
        }
        this.binaryExpression.operator = this.previousOp;
        this.previousOp = undefined;
    }
}
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