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https://github.com/jetbrains/mpsA meta-programming platform for designing Domain Specific Languages (DSLs) with full development environments, including editors, completion, and type checking. The platform uses generators to compile DSLs into target languages such as Java, C, or XML. This documentation covers building MPS from source using IntelliJ IDEA, configuring the Model Context Protocol (MCP) for coding agents, and a variety of sample projects demonstrating language definitions, custom aspects, generators, and debugger integration.
The Notes Organizer is a sample language designed to demonstrate how to build organized note and task management systems within JetBrains MPS. It allows users to:
The Financial Calculator sample project demonstrates how to use MPS-based Domain Specific Languages (DSLs) to specify financial calculations. It showcases the ability to define interactive forms that include:
The Requirement Tracking sample project demonstrates how to implement language-agnostic requirement tracking within JetBrains MPS. It showcases several advanced language constructs used to link implementation code (Java, XML, etc.) to high-level specifications.
Key capabilities demonstrated include:
TextGen to transform requirements into plain text files.The project is composed of several interconnected solutions:
BaseConcept attribute that can be attached to any node to hold references to requirement entries. It provides a "ShowTraces" editor hint to display traces alongside code.This smoke test verifies the end-to-end functionality of the Model Context Protocol (MCP) server in JetBrains MPS, specifically focusing on the intentions and quick-fixes surface. It ensures that an agent can:
The test builds a complete fixture from scratch, including a solution, a model, and BaseLanguage imports, then parses Java code into BaseLanguage classes to exercise the tools.
The _theSimplestLanguage sample is a minimalistic demonstration of a complete language lifecycle in JetBrains MPS. It covers three core areas:
public static void main method which, when executed, prints the value of the concept's string property to standard output.This sample is intended for users who want to see the most basic implementation of a language, its editor, and its generator working together.
NodeAttributes within MPS generators and text transformations (TextGen). It covers various scenarios where attributes attached to nodes need to be processed or utilized during code generation or text-based transformations.generator_demo repository contains a collection of languages and sample projects designed to illustrate common techniques for defining generators in JetBrains MPS. These samples are based on the Generator Demos tutorial and serve as practical examples of frequently used generator patterns.The mps-rcp plugin is designed to host general IDE functionality expected in most MPS-based RCP (Rich Client Platform) applications. It serves as a redistribution layer for common IDE-like features, separating them from the core mps-workbench (previously located in lib/mps-workbench.jar) and the specialized mps-ide plugin.
Use this plugin when you need to share common IDE functionality across different MPS-based applications without including the full-fledged MPS IDE features or the language designer tools found in mps-devkit.
The SampleJavaExtensions project demonstrates how to extend the Java language with custom constructs using JetBrains MPS. These samples cover language definitions, IDE customizations, dataflow analysis, type-system definitions, and code generation techniques.
Key examples include:
for loop that can use ExecutorServices or direct thread spawning. It includes IDE safety checks for non-final variables and mutable objects, utilizing @thread safe and @non thread safe annotations.final Java class for direct use.Money Literal constructs and specialized editor actions to transform numbers into money literals.