48 lines
1.1 KiB
JavaScript
48 lines
1.1 KiB
JavaScript
module.exports = Scope;
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var traverse = require("./traverse");
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var t = require("./types");
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var _ = require("lodash");
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function Scope(parent, block) {
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this.parent = parent;
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this.ids = block._scopeIds = block._scopeIds || Scope.getIds(block);
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}
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Scope.getIds = function (block) {
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var ids = [];
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if (t.isBlockStatement(block)) {
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_.each(block.body, function (node) {
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if (t.isVariableDeclaration(node) && node.kind !== "var") {
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ids = ids.concat(t.getIds(node));
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}
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});
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}
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if (t.isProgram(block) || t.isFunction(block)) {
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traverse(block, function (node) {
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if (t.isVariableDeclaration(node) && node.kind === "var") {
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ids = ids.concat(t.getIds(node));
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} else if (t.isFunction(node)) {
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return false;
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}
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});
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}
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if (t.isFunction(block)) {
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_.each(block.params, function (param) {
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ids = ids.concat(t.getIds(param));
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});
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}
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return ids;
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};
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Scope.prototype.has = function (id, noParent) {
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if (!id) return false;
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if (_.contains(this.ids, id)) return true;
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if (noParent !== false && this.parent) return this.parent.has(id);
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return false;
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};
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