var traverse = require("../../traverse");
var t = require("../../types");
var _ = require("lodash");
exports.Program =
exports.BlockStatement =
exports.ForInStatement =
exports.ForOfStatement =
exports.ForStatement = function (node, parent, file) {
var constants = [];
var check = function (node, names) {
_.each(names, function (name) {
if (constants.indexOf(name) >= 0) {
throw file.errorWithNode(node, name + " is read-only");
}
});
};
var getIds = function (node) {
return t.getIds(node, false, ["MemberExpression"]);
};
_.each(node.body, function (child) {
if (child && t.isVariableDeclaration(child, { kind: "const" })) {
_.each(child.declarations, function (declar) {
_.each(getIds(declar), function (name) {
check(declar, [name]);
constants.push(name);
});
declar._ignoreConstant = true;
});
child._ignoreConstant = true;
child.kind = "let";
}
});
if (!constants.length) return;
traverse(node, function (child) {
if (child._ignoreConstant) return;
if (t.isVariableDeclarator(child) || t.isDeclaration(child) || t.isAssignmentExpression(child)) {
check(child, getIds(child));
}
});
};
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