18 lines
674 B
JavaScript
18 lines
674 B
JavaScript
import { ObjectWrappingMap, PartitionedMap } 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 {Object} args
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* @returns {PartitionedMap}
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*/
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export function createSubScope(parentScope, args) {
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return new PartitionedMap(parentScope, new ObjectWrappingMap(args), new Set(Object.keys(args)));
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} |