rescript-lang / rescript-lang/reanalyze

[Feature request] Integrate with `@deriving({abstract: light})`

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Dominant language
OCaml
Stars
281
Forks
22
Avg merge
1d 19h
Merged PRs (30d)
7

Description

All the fields in the following script are reported as dead:

@deriving({abstract: light})
type person = {
  name: string,
  age: int,
}

let joe = person(~name="Joe", ~age=20)
let joeName = name(joe)

Report:

  Warning Dead Type
  File "src/TestBug.res", line 3, characters 2-14
  person.name is a record label never used to read a value
  <-- line 3
    @dead("person.name") name: string,

  Warning Dead Type
  File "src/TestBug.res", line 4, characters 2-10
  person.age is a record label never used to read a value
  <-- line 4
    @dead("person.age") age: int,

However, only age is not actually used in the code, while name shouldn't be reported.

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Research direction

Reproduce the report using the example in src/TestBug.res, including @deriving({abstract: light}), and compare the diagnostics for person.name and person.age. Done means the analyzer recognizes the name accessor as a read and reports only the unused age field.

Written by the indexing model from the issue text.

Assessment

Tech stack
ocaml
Domain
compilers
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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