-Wdangling-field detects view members initalized from a by-value owner parameter

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Description

struct Foo {};
struct Bar {
  const Foo& foo;
  Bar(Foo f ) : foo(f) {} // good, clang warn on this case
};


struct C {
    string_view s;
    C(std::string c) : s(c) {} // bad, clang doesn't warn on this case. support it
};

Contributor guide

Research direction

Study the existing Wdangling field diagnostic implementation in clang's Sema and extend it to cover cases where a string view member is initialized from a temporary std::string passed by value.

Tech stack

cpp

Domain

backend

Issue type

Feature

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

3

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.

Clear

Prerequisites

C++LLVM

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

40