adaptive-expressions
Version:
Common Expression Language
52 lines • 1.85 kB
JavaScript
;
/**
* @module adaptive-expressions
*/
/**
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.If = void 0;
const expressionEvaluator_1 = require("../expressionEvaluator");
const expressionType_1 = require("../expressionType");
const functionUtils_1 = require("../functionUtils");
const functionUtils_internal_1 = require("../functionUtils.internal");
const options_1 = require("../options");
const returnType_1 = require("../returnType");
/**
* Check whether an expression is true or false. Based on the result, return a specified value.
*/
class If extends expressionEvaluator_1.ExpressionEvaluator {
/**
* Initializes a new instance of the [If](xref:adaptive-expressions.If) class.
*/
constructor() {
super(expressionType_1.ExpressionType.If, If.evaluator, returnType_1.ReturnType.Object, If.validator);
}
/**
* @private
*/
static evaluator(expression, state, options) {
let result;
let error;
const newOptions = new options_1.Options(options);
newOptions.nullSubstitution = undefined;
({ value: result, error } = expression.children[0].tryEvaluate(state, newOptions));
if (!error && functionUtils_internal_1.InternalFunctionUtils.isLogicTrue(result)) {
({ value: result, error } = expression.children[1].tryEvaluate(state, options));
}
else {
({ value: result, error } = expression.children[2].tryEvaluate(state, options));
}
return { value: result, error };
}
/**
* @private
*/
static validator(expr) {
functionUtils_1.FunctionUtils.validateArityAndAnyType(expr, 3, 3);
}
}
exports.If = If;
//# sourceMappingURL=if.js.map