26 lines
880 B
JavaScript
26 lines
880 B
JavaScript
import { createEmptyMap, assign } from './map.js';
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/**
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* Create a new scope which can access the parent scope,
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* but does not affect it when written. This is suitable for variable definitions
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* within a block node, or function definition.
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*
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* If parent scope has a createSubScope method, it delegates to that. Otherwise,
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* creates an empty map, and copies the parent scope to it, adding in
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* the remaining `args`.
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*
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* @param {Map} parentScope
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* @param {...any} args
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* @returns {Map}
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*/
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export function createSubScope(parentScope) {
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for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
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args[_key - 1] = arguments[_key];
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}
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if (typeof parentScope.createSubScope === 'function') {
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return assign(parentScope.createSubScope(), ...args);
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}
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return assign(createEmptyMap(), parentScope, ...args);
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} |