相关疑难解决方法(0)

我有以下代码:

pub struct Canvas<'a> {
    width: isize,
    height: isize,
    color: Color,
    surface: Surface,
    texture: Texture,
    renderer: &'a Renderer,
}

impl<'a> Canvas<'a> {
    pub fn new(width: isize, height: isize, renderer: &'a Renderer) -> Canvas<'a> {
        let color = Color::RGB(0, 30, 0);
        let mut surface = core::create_surface(width, height);
        let texture = Canvas::gen_texture(&mut surface, width, height, color, renderer);
        Canvas {
            width: width,
            height: height,
            color: color,
            surface: surface,
            texture: texture,
            renderer: renderer,
        }
    }

    pub fn color(&mut self, color: Color) -> &mut Canvas<'a> …

tl;drerror[E0716]: temporary value dropped while borrowed是一个困难且常见的问题，有一致的解决方案吗？

我遇到了困难的 rustc 错误

error[E0716]: temporary value dropped while borrowed
...

creates a temporary which is freed while still in use

搜索Stackoverflow，有很多关于这个rust error的问题error[E0716]。 也许 Rust 专家可以为这个常见的新手问题提供一个通用的解决方案，一个足够好的解决方案，它也可以回答链接的问题（见下文）。

示例代码

一个简洁的代码示例来演示该问题（Rust Playground）：

type Vec1<'a> = Vec::<&'a String>;

fn fun1(s1: &String, v1: &mut Vec1) {
    v1.insert(0, &s1.clone());
}

fn main() {
    let mut vec1 = Vec::new();
    let str1 = String::new();
    fun1(&str1, &mut vec1);
}

结果：

error[E0716]: temporary value dropped while borrowed
 --> …