Potential improvements for the templated source generator

[utensil]

This is more of a meta issue to track some ideas the came to me during writing the template for Rust:

• [ ] Generate more idiomatic code
  • [ ] Rust #45
• [ ] Generate code for more languages
  • [ ] Julia
• [ ] More flexibility for code generator
  • [ ] Code organization
  • [ ] External dependency
• [ ] Allowing reuse of generated algebra code as libraries
  • [ ] Optional main()?
  • [ ] Name conflicts of types, constants and free functions?
• [x] Supports compiling only one language or some languages (for users with only dev environment for some of these languages) #44
• [ ] Add codegen to CI
• [ ] Add tests to verify the correctness
  • [ ] Option 1: by checking the outputs of examples
  • [ ] Option 2: by generating unit tests
• [ ] Add benchmark to identify performance issues

[enkimute]

Thanks utensil for the productive feedback (and the rust template !)

Some additions and remarks

• [ ] rust template support >5d (try make r600).

• [ ] Graded algebra support (class per grade + subalgebras)

• [ ] languages : glsl

• [ ] languages : vulkan

I'll make a start on the others, leaving those that perhaps need some extra discussion.