JuliaLang/julia

generators should lower to `Iterators.map`, not `Base.Generator`

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#34,368 opened on Jan 14, 2020

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 (12 comments) (4 reactions) (0 assignees)Julia (5,773 forks)batch import
compiler:loweringhelp wanted

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Description

This will allow dispatching to types that aren't always Base.Generator

Contributor guide

Research direction
Understand the current lowering of generators and trace where `Base.Generator` is created. Then modify the lowering to use `Iterators.map` instead, ensuring all existing tests pass and considering edge cases where types may not be `Base.Generator`.
Tech stack
None
Domain
backend
Issue type
Refactor
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
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.
Clear
Prerequisites
Julia
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75