62 lines
1.8 KiB
JavaScript
62 lines
1.8 KiB
JavaScript
var t = require("../../types");
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var _ = require("lodash");
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var isProtoKey = function (node) {
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return t.isLiteral(t.toComputedKey(node, node.key), { value: "__proto__" });
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};
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var isProtoAssignmentExpression = function (node) {
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var left = node.left;
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return t.isMemberExpression(left) && t.isLiteral(t.toComputedKey(left, left.property), { value: "__proto__" });
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};
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var buildDefaultsCallExpression = function (expr, ref, file) {
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return t.expressionStatement(t.callExpression(file.addHelper("defaults"), [ref, expr.right]));
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};
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exports.optional = true;
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exports.secondPass = true;
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exports.AssignmentExpression = function (node, parent, scope, context, file) {
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if (t.isExpressionStatement(parent)) return;
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if (!isProtoAssignmentExpression(node)) return;
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var nodes = [];
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var left = node.left.object;
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var temp = scope.generateTempBasedOnNode(node.left.object, file);
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nodes.push(t.expressionStatement(t.assignmentExpression("=", temp, left)));
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nodes.push(buildDefaultsCallExpression(node, temp, file));
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if (temp) nodes.push(temp);
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return t.toSequenceExpression(nodes);
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};
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exports.ExpressionStatement = function (node, parent, scope, context, file) {
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var expr = node.expression;
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if (!t.isAssignmentExpression(expr, { operator: "=" })) return;
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if (isProtoAssignmentExpression(expr)) {
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return buildDefaultsCallExpression(expr, expr.left.object, file);
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}
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};
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exports.ObjectExpression = function (node, parent, scope, context, file) {
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var proto;
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for (var i = 0; i < node.properties.length; i++) {
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var prop = node.properties[i];
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if (isProtoKey(prop)) {
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proto = prop.value;
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_.pull(node.properties, prop);
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}
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}
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if (proto) {
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var args = [t.objectExpression([]), proto];
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if (node.properties.length) args.push(node);
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return t.callExpression(file.addHelper("extends"), args);
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}
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};
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