dtolnay/gflags

Add build option to use C++ gflags as backend

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#6 opened on Apr 20, 2019

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help wanted

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Description

The pure Rust implementation is good as a default, but it would be amazing to also provide:

[dependencies]
gflags = { version = "0.N", features = ["interop"] }

in which everything looks and behaves the same at the Rust source code level but the implementation switches to exactly the one used by C++ gflags, so that flags defined in Rust are seen by a C++ main function and vice versa.

Unsure whether this is possible.

Contributor guide

Research direction
Investigate how to conditionally compile Rust gflags to use C++ gflags via FFI, creating a feature flag like 'interop' that links to the C++ library and exposes the same Rust API.
Tech stack
rust
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
RustC++FFI
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30