expr-parser

Overview

A handy js expression parser.

How to Install

ohpm install @ohos/expr-parser

For details, see Installing an OpenHarmony HAR.

Tips

This library is built on top of expr-parser 1.0.0. To use the original library directly, you can install it via ohpm install expr-parser.

import Expression from "expr-parser"; //The package import differs slightly, while the usage remains consistent.

How to Use

import Expression from "@ohos/expr-parser";
import hilog from '@ohos.hilog';

const exprCalc = new Expression('a.value + 12 - (2 * 14 / 4)').parse(); // Incoming expression.
let res = exprCalc({ a: { value: 3 } }); // Pass in the data and store the result in the res variable.
hilog.info(0x0001, "expr-parser TEST:", "result: %{public}d", res); // Print calculation results 8.

Available APIs

• Generating formula calculator

const exprCalc = new Expression('a.value + 12 - (2 * 14 / 4)').parse();

Constraints

expr-parser has been verified in the following version:

• DevEco Studio Version: 5.0.1 Release, OpenHarmony SDK: API Version 13 Release (5.0.1.115).
• DevEco Studio Version：DevEco Studio 5.1.0 Canary1(5.1.0.229)，OpenHarmony SDK:5.1.0.229 API16(5.1.0.46).

Directory Structure

|----exprParser
|    |---- entry
|         |---- src
|              |---- main
|                   |---- ets
|                        |---- pages
|                             |---- Index.ets  # sample code
|              |---- ohosTest  # xts code
|    |---- library  # Core implementation of the expr-parser
|    |---- README.md  # Readme
|    |---- README_zh.md  # Chinese Readme

How to Contribute

If you find any problem when using expr-parser, submit an Issue or a PR.

License

This project is licensed under MIT License.