@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) */
function pushLocalEnvironment(base) {
    return {
        current: new environment_1.Environment(base.current),
        level: base.level + 1
    };
}
function popLocalEnvironment(base) {
    (0, assert_1.guard)(base.level > 0, 'cannot remove the global/root environment');
    const parent = base.current.parent;
    (0, assert_1.guard)(parent !== undefined, 'level is wrong, parent is undefined even though level suggested depth > 0 (starts with 0)');
    return {
        current: parent,
        level: base.level - 1
    };
}
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