calcurator

A learning project following the JetBrains MPS Calculator language tutorial — the classic introduction to language-oriented programming with the Meta Programming System.

This repository captures the early steps of the tutorial: a custom language jetbrains.mps.calculator is defined with a single rootable Calculator concept, a minimal projectional editor for it, and a sandbox model containing one Calculator instance. The structure, editor, behavior, constraints, typesystem, and generator aspects are scaffolded, along with the MPS-generated sources and classes.

Project Structure

.mps/                                  # MPS project metadata
languages/jetbrains.mps.calculator/
├── jetbrains.mps.calculator.mpl       # Language module descriptor
├── models/
│   ├── structure.mps                  # Concept definitions (Calculator)
│   ├── editor.mps                     # Projectional editor cells
│   ├── behavior.mps                   # Behavior aspect (scaffold)
│   ├── constraints.mps                # Constraints aspect (scaffold)
│   └── typesystem.mps                 # Typesystem aspect (scaffold)
├── generator/                         # Generator templates and generated code
└── sandbox/                           # Sandbox solution with a Calculator instance

Requirements

• JetBrains MPS (built with the MPS 3.x line; recent MPS versions may require a project migration)

Usage

1. Open the repository root as a project in JetBrains MPS.
2. Explore the jetbrains.mps.calculator language aspects (structure, editor, etc.).
3. Open the sandbox solution to see the Calculator instance rendered in the projectional editor.

Status

This is a legacy tutorial exercise from 2018, preserved as-is for reference. It implements only the initial steps of the MPS calculator tutorial and is not maintained.