Covariant Script Programming Language: The Interpreter(Education Edition)

Welcome to the Covariant Script programming language!
Covariant Script is an open source, cross-platform programming language.
This project is an officially maintained Covariant Script interpreter(Education Edition).

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• 简体中文
• English

About Education Edition

The Education Edition is a modified version based on the standard version, removing some third-party components and new features that are less stable.
However, as the main project is updated, this version will follow up with more stable features and security fixes.

Features

• Cross-platform, supporting most mainstream Operating Systems
• Designed for educational purposes, more stable
• Powerful and bloat-free extension system
• Good compatibility -- written in C++14
• Dependency-free and efficient compiler front-end
• Serialize optimized AST
• Efficient memory management system
• Compile-time optimization
• Reference count garbage collection system
• C/C++ Native Interface (CNI)

Extensions

• Darwin Universal CGL
• Regular Expression
• SQLite3 Database
• Dear ImGui GUI
• Base64 Codec
• ASIO Network
• Streams API

Documentation

CovScript Online Documents

Installation

• Download the precompiled executable on the Latest Release
• Directly compile source code with CMake toolchain

Run

Basic command

cs [options...] <FILE> [arguments...]

Options

Option	Mnemonic	Function
--compile-only	-c	Only compile
--no-optimize	-o	Disable optimizer
--help	-h	Show help infomation
--version	-v	Show version infomation
--wait-before-exit	-w	Wait before process exit
--dump-ast	-d	Export abstract syntax tree
--log-path <PATH>	-l <PATH>	Set the log and AST exporting path
--import-path <PATH>	-i <PATH>	Set the import path

Note that if you do not set the log and AST exporting path, both will be printed to stdout.

Repl

cs_repl [options...]

Options

Option	Mnemonic	Function
--help	-h	Show help infomation
--version	-v	Show version infomation
--silent	-s	Close the command prompt
--wait-before-exit	-w	Wait before process exit
--args <...>	-a <...>	Set the covscript arguments
--log-path <PATH>	-l <PATH>	Set the log path
--import-path <PATH>	-i <PATH>	Set the import path

Note:

• Everything you set after option --args or its mnemonic -a will be regarded as arguments.
• If you do not set a log path, it will be printed to stdout.

Examples

The examples folder contains several example programs written by CovScript.

Copyright

The author of the Covariant Script Programming Language is @mikecovlee.
Copyright © 2019 Michael Lee

Thanks

Ordered by contribution.

• Consultant: @ice1000, @imkiva
• Testing: Shi Youcheng, @imkiva
• Douments: @imkiva, @ice1000
• Streams API Extension: @imkiva
• IntelliJ Plugin: @ice1000

Comments

Comments by @ice1000:

This is a programming language created by my friend Michael Lee, written in C++. The detailed description is on its website so I’ll just put some comments here. This is a C-like language (at least the function call syntax is of C style), while functions, structs, namespaces are ends with end like Ruby, and it has the concepts of package import using (the module system).
Its parser is hand-written (very complex, although parsers are trivial), which impressed me (I didn’t even think of that when working on Lice, I just wrote an AST evaluator).
This language supports invoking functions written in C++, like JNI.
CovScript mostly features its powerful standard library, which has database, GUI, web access, regular expressions.