"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = gatherSequenceExpressions;
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var _getBindingIdentifiers = require("../retrievers/getBindingIdentifiers");
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var _generated = require("../validators/generated");
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var _generated2 = require("../builders/generated");
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var _cloneNode = require("../clone/cloneNode");
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function gatherSequenceExpressions(nodes, scope, declars) {
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const exprs = [];
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let ensureLastUndefined = true;
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for (const node of nodes) {
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if (!(0, _generated.isEmptyStatement)(node)) {
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ensureLastUndefined = false;
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}
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if ((0, _generated.isExpression)(node)) {
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exprs.push(node);
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} else if ((0, _generated.isExpressionStatement)(node)) {
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exprs.push(node.expression);
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} else if ((0, _generated.isVariableDeclaration)(node)) {
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if (node.kind !== "var") return;
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for (const declar of node.declarations) {
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const bindings = (0, _getBindingIdentifiers.default)(declar);
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for (const key of Object.keys(bindings)) {
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declars.push({
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kind: node.kind,
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id: (0, _cloneNode.default)(bindings[key])
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});
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}
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if (declar.init) {
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exprs.push((0, _generated2.assignmentExpression)("=", declar.id, declar.init));
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}
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}
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ensureLastUndefined = true;
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} else if ((0, _generated.isIfStatement)(node)) {
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const consequent = node.consequent ? gatherSequenceExpressions([node.consequent], scope, declars) : scope.buildUndefinedNode();
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const alternate = node.alternate ? gatherSequenceExpressions([node.alternate], scope, declars) : scope.buildUndefinedNode();
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if (!consequent || !alternate) return;
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exprs.push((0, _generated2.conditionalExpression)(node.test, consequent, alternate));
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} else if ((0, _generated.isBlockStatement)(node)) {
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const body = gatherSequenceExpressions(node.body, scope, declars);
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if (!body) return;
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exprs.push(body);
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} else if ((0, _generated.isEmptyStatement)(node)) {
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if (nodes.indexOf(node) === 0) {
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ensureLastUndefined = true;
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}
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} else {
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return;
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}
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}
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if (ensureLastUndefined) {
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exprs.push(scope.buildUndefinedNode());
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}
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if (exprs.length === 1) {
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return exprs[0];
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} else {
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return (0, _generated2.sequenceExpression)(exprs);
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}
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}
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