Applib Programs: let and bang syntax #98
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Pull Request Overview
This PR adds two new syntax features to the Applib surface program language: let bindings for local variable declaration and bang (!) syntax for reinterpreting arbitrary Lean terms as programs.
- Adds
letbinding syntax with optional type annotations for local variable declarations within programs - Introduces
!(bang) syntax to allow embedding arbitrary Lean terms directly into program contexts - Updates syntax rules and macro expansions to support these new constructs
Reviewed Changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.
| File | Description |
|---|---|
| Applib/Surface/Program/Syntax.lean | Implements core syntax definitions and macro rules for let bindings and bang syntax |
| Tests/Applib/Surface/Program/Syntax.lean | Adds comprehensive test cases demonstrating the new let and bang syntax features |
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janmasrovira
approved these changes
Sep 8, 2025
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! termsyntax.