dtolnay/cxx

Support rust::Vec and std::vector of SharedPtr to Opaque types

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#741 创建于 2021年3月17日

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 (1 评论) (1 反应) (0 负责人)Rust (4,472 star) (253 fork)batch import
help wanted

描述

I understand, why we can't hold opaque types in both vectors, but why we can't hold SharedPtrs to this types?

Those functions are currently unavailable.

#[cxx::bridge]
mod ffi {
  unsafe extern "C++" {
    fn opaqueVector() -> &'static CxxVector<SharedPtr<CxxString>>;
    fn opacueVec() -> Vec<SharedPtr<CxxString>>;
  }
}

贡献者指南

技术栈
rustcpp
领域
backenddeveloper experience
议题类型
feature
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
4
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
3-5 days
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stale
清晰度议题是否清楚说明期望改动、验收标准和下一步。
clear
前置要求
RustC++CXX librarySharedPtr concept
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
20
研究方向
Investigate the current implementation of CxxVector and Vec in the CXX codebase, particularly how opaque types are handled. Look at the existing support for SharedPtr and determine why vectors of SharedPtr to opaque types are not allowed. Consider modifications to the code generation in the CXX bridge to enable this pattern. Files to examine: include/cxx.h, src/cxx.cc, and the Rust side lib.rs in the cxx crate.