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It is a rule-local, non-interprocedural analysis and it also uses VarAnalysisUtil. New analysis checks whether free variables can "escape" principal constraint rules inside principal constraints. If there is such escaped variable, then it is a signal that this type system is designed with non-local type inference in mind. Otherwise there's no need to produce principal constraints with free logicals as arguments. So, no principal constraints with free vars -- no type inference is possible. |
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README.md
Code Rules - Implementation Notes
Structure
The project modules are separated into several groups to separate levels of abstraction.
Logic
Define fundamental ideas used throughout the implementation, such as «data form» (a.k.a. term), logical variables, and others.
Code rules
Modules in this group define the core concepts of coderules and the logic behind it. This includes constraints, predicates, handlers, as well as code rule templates.
Constraints activation trace view for debugging the process of evaluating constraint rules.
Once finished, constraint rules produce inferred types and type errors, which are added as highlighter annotations to the editor.
Type checking
Defines a custom aspect «types», which is used to store the typing rules in the language source code.
Type checking plugin for MPS provides the actions for checking the types in a currently opened root.
Control flow
Declares only control flow aspect. All functionality is inherited from coderules language.