core.typed

typechecker fails when checking a Protocol whose method gets called using dot notation

Details

  • Type: Defect Defect
  • Status: Closed Closed
  • Priority: Minor Minor
  • Resolution: Completed
  • Affects Version/s: None
  • Fix Version/s: None
  • Component/s: None
  • Labels:
  • Environment:
    Clojure 1.6.0, core.typed 0.2.44

Description

The error message is

No method in multimethod 'check' for dispatch value: :host-interop

The following is a minimal test case which fails:

core.clj
(ns core-typed-bug.core
    (:require [clojure.core.typed :refer :all]))
 
(defprotocol> ITypedTest
    (get-data [this]))
 
(defn> testfn :- Any
    [asdf :- Keyword, in :- ITypedTest]
    (.get-data in))

It works, however, when calling (get-data in) instead of (.get-data in).

Activity

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Nicola Mometto added a comment -

tools.analyzer.jvm returns a :host-interop node when, like in this case, it encounters an interop form of the form (.foo bar) and can't determine whether it's a no-arg method call or a field-access.

I don't know enough about core.typed internals but it looks like there should be an add-check-method for :host-interop that behaves like check methods for :instance-field/:instance-call that resolve to runtime reflection (not :validated)

Show
Nicola Mometto added a comment - tools.analyzer.jvm returns a :host-interop node when, like in this case, it encounters an interop form of the form (.foo bar) and can't determine whether it's a no-arg method call or a field-access. I don't know enough about core.typed internals but it looks like there should be an add-check-method for :host-interop that behaves like check methods for :instance-field/:instance-call that resolve to runtime reflection (not :validated)
Hide
Daniel Ziltener added a comment -

As of version 0.2.51, this still happens reliably.

Show
Daniel Ziltener added a comment - As of version 0.2.51, this still happens reliably.

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Dates

  • Created:
    Updated:
    Resolved: