浏览代码

Backwards type propagation leads to cryptic errors

In the committed code, the chosen type is from the second error
declaration and not the first.
rust-46606
Mahmoud Al-Qudsi 2 年前
当前提交
7808841390
共有 4 个文件被更改,包括 240 次插入0 次删除
  1. +2
    -0
      .gitignore
  2. +210
    -0
      Cargo.lock
  3. +8
    -0
      Cargo.toml
  4. +20
    -0
      src/main.rs

+ 2
- 0
.gitignore 查看文件

@@ -0,0 +1,2 @@
/target/
**/*.rs.bk

+ 210
- 0
Cargo.lock 查看文件

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+ 8
- 0
Cargo.toml 查看文件

@@ -0,0 +1,8 @@
[package]
name = "futuretest"
version = "0.1.0"
authors = ["Mahmoud Al-Qudsi <mqudsi@neosmart.net>"]

[dependencies]
futures = "*"
tokio-core = "*"

+ 20
- 0
src/main.rs 查看文件

@@ -0,0 +1,20 @@
extern crate futures;
extern crate tokio_core;
use futures::future::{self};
use futures::future::*;
use tokio_core::reactor::Core;

fn main() {
let mut core = Core::new().expect("Failed to initialize tokio_core reactor!");

let f = future::result(Ok(()))
.map_err(|()| "&'static str error")
.and_then(|_|
future::result(Ok(())
.map_err(|()| "String error".to_owned())
)
)
;

core.run(f).unwrap();
}

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