114 lines
2.5 KiB
JavaScript
114 lines
2.5 KiB
JavaScript
var util = require("../../util");
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var t = require("../../types");
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var _ = require("lodash");
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var getSpreadLiteral = function (spread) {
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var literal = spread.argument;
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if (!t.isArrayExpression(literal)) {
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literal = util.template("array-from", {
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VALUE: literal
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});
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}
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return literal;
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};
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var hasSpread = function (nodes) {
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var has = false;
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_.each(nodes, function (node) {
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if (t.isSpreadElement(node)) {
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has = true;
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return false;
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}
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});
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return has;
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};
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var build = function (props) {
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var nodes = [];
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var _props = [];
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var push = function () {
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if (!_props.length) return;
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nodes.push(t.arrayExpression(_props));
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_props = [];
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};
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_.each(props, function (prop) {
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if (t.isSpreadElement(prop)) {
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push();
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nodes.push(getSpreadLiteral(prop));
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} else {
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_props.push(prop);
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}
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});
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push();
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return nodes;
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};
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exports.ArrayExpression = function (node) {
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var elements = node.elements;
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if (!hasSpread(elements)) return;
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var nodes = build(elements);
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var first = nodes.shift();
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if (!nodes.length) return first;
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return t.callExpression(t.memberExpression(first, t.identifier("concat")), nodes);
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};
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exports.CallExpression = function (node) {
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var args = node.arguments;
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if (!hasSpread(args)) return;
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var contextLiteral = t.literal(null);
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node.arguments = [];
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var nodes = build(args);
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var first = nodes.shift();
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if (nodes.length) {
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node.arguments.push(t.callExpression(t.memberExpression(first, t.identifier("concat")), nodes));
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} else {
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node.arguments.push(first);
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}
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var callee = node.callee;
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if (t.isMemberExpression(callee)) {
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contextLiteral = callee.object;
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if (callee.computed) {
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callee.object = t.memberExpression(callee.object, callee.property, true);
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callee.property = t.identifier("apply");
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callee.computed = false;
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} else {
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callee.property = t.memberExpression(callee.property, t.identifier("apply"));
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}
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} else {
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node.callee = t.memberExpression(node.callee, t.identifier("apply"));
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}
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node.arguments.unshift(contextLiteral);
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};
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exports.NewExpression = function (node, parent, file) {
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var args = node.arguments;
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if (!hasSpread(args)) return;
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var nodes = build(args);
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var first = nodes.shift();
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if (nodes.length) {
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args = t.callExpression(t.memberExpression(first, t.identifier("concat")), nodes);
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} else {
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args = first;
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}
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return t.callExpression(file.addDeclaration("apply-constructor"), [node.callee, args]);
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};
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