33 lines
1.0 KiB
JavaScript
33 lines
1.0 KiB
JavaScript
|
"use strict";
|
||
|
|
|
||
|
|
Object.defineProperty(exports, "__esModule", {
|
||
|
|
value: true
|
||
|
|
});
|
||
|
|
exports.createSubScope = createSubScope;
|
||
|
|
|
||
|
|
var _map = require("./map.js");
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Create a new scope which can access the parent scope,
|
||
|
|
* but does not affect it when written. This is suitable for variable definitions
|
||
|
|
* within a block node, or function definition.
|
||
|
|
*
|
||
|
|
* If parent scope has a createSubScope method, it delegates to that. Otherwise,
|
||
|
|
* creates an empty map, and copies the parent scope to it, adding in
|
||
|
|
* the remaining `args`.
|
||
|
|
*
|
||
|
|
* @param {Map} parentScope
|
||
|
|
* @param {...any} args
|
||
|
|
* @returns {Map}
|
||
|
|
*/
|
||
|
|
function createSubScope(parentScope) {
|
||
|
|
for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
|
||
|
|
args[_key - 1] = arguments[_key];
|
||
|
|
}
|
||
|
|
|
||
|
|
if (typeof parentScope.createSubScope === 'function') {
|
||
|
|
return _map.assign.apply(void 0, [parentScope.createSubScope()].concat(args));
|
||
|
|
}
|
||
|
|
|
||
|
|
return _map.assign.apply(void 0, [(0, _map.createEmptyMap)(), parentScope].concat(args));
|
||
|
|
}
|