Skip to content

GitLab

  • Projects
  • Groups
  • Snippets
  • Help
    • Loading...
  • Help
    • Help
    • Support
    • Community forum
    • Submit feedback
  • Sign in / Register
GHC
GHC
  • Project overview
    • Project overview
    • Details
    • Activity
    • Releases
  • Repository
    • Repository
    • Files
    • Commits
    • Branches
    • Tags
    • Contributors
    • Graph
    • Compare
    • Locked Files
  • Issues 4,391
    • Issues 4,391
    • List
    • Boards
    • Labels
    • Service Desk
    • Milestones
    • Iterations
  • Merge Requests 372
    • Merge Requests 372
  • Requirements
    • Requirements
    • List
  • CI / CD
    • CI / CD
    • Pipelines
    • Jobs
    • Schedules
    • Test Cases
  • Operations
    • Operations
    • Incidents
    • Environments
  • Analytics
    • Analytics
    • CI / CD
    • Code Review
    • Insights
    • Issue
    • Repository
    • Value Stream
  • Wiki
    • Wiki
  • Snippets
    • Snippets
  • Members
    • Members
  • Activity
  • Graph
  • Create a new issue
  • Jobs
  • Commits
  • Issue Boards
Collapse sidebar
  • Glasgow Haskell Compiler
  • GHCGHC
  • Issues
  • #9763

Closed
Open
Opened Nov 03, 2014 by David Feuer@treeowlReporter

Implement Foldable methods for Array directly

Currently, they're implemented via conversion to lists. This works out sanely for foldr and foldr1, after some transformations, but it's rather less sane for left folds. Left folds end up "twisted" like their list counterparts, giving potentially surprising performance characteristics. For Array, left and right folds can reasonably be expected to be symmetrical.

Trac metadata
Trac field Value
Version 7.9
Type Task
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture
Assignee
Assign to
7.10.1
Milestone
7.10.1 (Past due)
Assign milestone
Time tracking
None
Due date
None
Reference: ghc/ghc#9763