@eagleoutice/flowr/dataflow/environments/scoping.js

Static Dataflow Analyzer and Program Slicer for the R Programming Language

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.pushLocalEnvironment = pushLocalEnvironment;
exports.popLocalEnvironment = popLocalEnvironment;
const environment_1 = require("./environment");
const assert_1 = require("../../util/assert");
/**
 * Add a new local environment scope to the stack, returns the modified variant - sharing the original environments in the stack (no deep-clone)
 * @see {@link popLocalEnvironment} - to remove the local scope again
 */
function pushLocalEnvironment({ level, current }) {
    return {
        current: new environment_1.Environment(current),
        level: level + 1
    };
}
/**
 * Remove the top local environment scope from the stack, returns the modified variant - sharing the original environments in the stack (no deep-clone)
 * @see {@link pushLocalEnvironment} - to add a local scope
 */
function popLocalEnvironment({ current, level }) {
    (0, assert_1.guard)(level > 0, 'cannot remove the global/root environment');
    return {
        current: current.parent,
        level: level - 1
    };
}
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