cmd/vet: warn about unused struct or array, ignoring assignment to field or element · golang/go#449

2009-12-22T02:14:21.000Z

by **RyanneDolan**: What steps will reproduce the problem? v := new(struct{i int}) v.i = 1 What is the expected output? What do you see instead? Should get "v declared and not used" error. Instead, compiles fine. What is your $GOOS? $GOARCH? linux/386 Which revision are you using? (hg identify) 54392bd03d06 tip Please provide any additional information below. The dot operator should mark its left operand as "used" only when it appears on the RHS. a = 1 // 'a' is not marked as used (CORRECT) v.i = 1 // 'v' is marked as used (WRONG) a = v.i // 'v' is marked as used (CORRECT) This bug is important to fix for consistency, and because it confuses new programmers who might expect reference semantics: for _,v := range arr {v.i = 1} // doesn't do anything Mentioned here: http://groups.google.com/group/golang- nuts/browse_thread/thread/342fe61c78916496/fbb57f693f1aca72

(9 Kommentare) (0 Reaktionen) (0 zugewiesene Personen)Go (19.008 Forks)batch import

AnalysisNeedsFixhelp wanted

Repository-Metriken

Stars: (133.883 Stars)
PR-Merge-Metriken: (Keine gemergten PRs in 30 T)

Beschreibung

by RyanneDolan:

Contributor Guide

Research-Richtung: Überprüfen Sie den Code des cmd/vet Tools, um herauszufinden, wo Zuweisungen an Strukturfelder oder Array Elemente den linken Operanden als verwendet markieren, und ändern Sie ihn so, dass er nur markiert wird, wenn der Ausdruck auf der rechten Seite erscheint.
Tech Stack: go
Domain: backend
Issue Type: Fehler
Schwierigkeit: 2
Geschätzte Zeit: 1-3 Stunden
Aktivitätsstatus: Aktiv
Klarheit: Klar
Voraussetzungen: Go
Einsteigerfreundlichkeit: 60

Repository-Metriken

Beschreibung

Contributor Guide

Erhalte frische Easy Issues per E-Mail.