[minxomat]

All these ideas have been implemented in JetBrains MPS. Terms to look up are structural/projectional editing and language workbenches.

Here's a concise demo (although you should read the original paper and the documentation to really grasp this concept): https://youtu.be/pVIywLXDuRo

Papers: https://confluence.jetbrains.com/display/MPS/MPS+publication...