stan-dev / stan-dev/stanc3

Typechecker: Allow predicate-based typechecking of library functions

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Dominant language
OCaml
Stars
160
Forks
59
Avg merge
21h 45m
Merged PRs (30d)
26

Description

This would allow Array functions to be able to accept arrays of tuples,
e.g. size

And also allow vectorization of things like a 7-parameter function, which would currently be too expensive to enumerate

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by tracing the typechecker’s handling of library functions, especially Array functions, and review the linked discussion about vectorizing a seven-parameter function. The work is done when predicate-based checking supports arrays of tuples such as the size example and enables the described vectorization without enumerating all parameter combinations.

Written by the indexing model from the issue text.

Assessment

Tech stack
ocaml
Domain
compilers
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
30/100

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