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add some packages
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61
node_modules/babel-plugin-transform-inline-consecutive-adds/lib/set-collapser.js
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61
node_modules/babel-plugin-transform-inline-consecutive-adds/lib/set-collapser.js
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"use strict";
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const Collapser = require("./collapser");
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class SetCollapser extends Collapser {
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isInitTypeValid(init) {
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return init.isNewExpression() && init.get("callee").isIdentifier() && init.node.callee.name === "Set" && ( // other iterables might not be append-able
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init.node.arguments.length === 0 || init.node.arguments.length === 1 && init.get("arguments")[0].isArrayExpression());
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}
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isExpressionTypeValid(expr) {
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return expr.isCallExpression();
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}
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getExpressionChecker(objName, checkReference) {
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return expr => {
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// checks expr is of form:
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// foo.add(rval)
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const callee = expr.get("callee");
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if (!callee.isMemberExpression()) {
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return false;
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}
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const obj = callee.get("object"),
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prop = callee.get("property");
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if (!obj.isIdentifier() || obj.node.name !== objName || !prop.isIdentifier() || prop.node.name !== "add") {
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return false;
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}
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const args = expr.get("arguments");
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if (args.length !== 1) {
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return false;
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}
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if (checkReference(args[0])) {
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return false;
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}
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return true;
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};
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}
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extractAssignment(expr) {
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return expr.node.arguments[0];
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}
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addSuccessfully(t, arg, init) {
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if (init.arguments.length === 0) {
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init.arguments.push(t.arrayExpression());
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}
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init.arguments[0].elements.push(arg);
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return true;
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}
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}
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module.exports = SetCollapser;
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