JuliaLang/julia

Do something else when method name is a TypeVar

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#33,537 opened on Oct 11, 2019

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Description

I encountered the following behavior, which is just odd:

julia> T(a, b, c) where T = 1
T (generic function with 0 methods)

Apparently what happened was:

  1. It created a method T
  2. It added the defined method to something else (TypeVar, Any - one of them anyway)
  3. It returned the method T

According to @JeffBezanson this should do "something else, whatever it may be", so here's the issue for that.

Contributor guide

Research direction
Investigate how method definitions handle TypeVar and trace the code path in the Julia compiler.
Tech stack
julia
Domain
compilers
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
JuliaGit
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30