Unable to compile example - cannot infer type, consider giving `result` a type #3

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opened 2020-03-24 12:30:22 -07:00 by diit · 1 comment

diit commented

2020-03-24 12:30:22 -07:00

(Migrated from github.com)

Setup

Git clone master
cargo run

Versions

Default host: x86_64-apple-darwin
rustup home: /.../.rustup

installed toolchains

stable-x86_64-apple-darwin
1.35.0-x86_64-apple-darwin
1.39.0-x86_64-apple-darwin

active toolchain

1.35.0-x86_64-apple-darwin (overridden by '/.../alchemy/rust-toolchain')
rustc 1.35.0 (3c235d560 2019-05-20)

What are you trying to accomplish?

Running example

What is the actual output?

error[E0282]: type annotations needed
  --> cocoa/src/app.rs:42:13
   |
42 |             msg_send![&*inner, setDelegate:delegate];
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |             |
   |             cannot infer type
   |             consider giving `result` a type
   |
   = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)

warning: unused import: `Component`
  --> cocoa/src/window.rs:16:46
   |
16 | use alchemy_lifecycle::traits::{AppDelegate, Component};
   |                                              ^^^^^^^^^
   |
   = note: #[warn(unused_imports)] on by default

error: aborting due to previous error

For more information about this error, try `rustc --explain E0282`.
error: Could not compile `alchemy-cocoa`.
warning: build failed, waiting for other jobs to finish...
error: build failed

Checklist

I have already looked over the issue tracker for similar issues.
This issue can be reproduced on Rust's stable channel. (Your issue will be
closed if this is not the case)

## Setup - Git clone master - `cargo run` ### Versions Default host: x86_64-apple-darwin rustup home: /.../.rustup installed toolchains -------------------- stable-x86_64-apple-darwin 1.35.0-x86_64-apple-darwin 1.39.0-x86_64-apple-darwin active toolchain ---------------- 1.35.0-x86_64-apple-darwin (overridden by '/.../alchemy/rust-toolchain') rustc 1.35.0 (3c235d560 2019-05-20) ### What are you trying to accomplish? Running example ### What is the actual output? ``` error[E0282]: type annotations needed --> cocoa/src/app.rs:42:13 | 42 | msg_send![&*inner, setDelegate:delegate]; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | | | cannot infer type | consider giving `result` a type | = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) warning: unused import: `Component` --> cocoa/src/window.rs:16:46 | 16 | use alchemy_lifecycle::traits::{AppDelegate, Component}; | ^^^^^^^^^ | = note: #[warn(unused_imports)] on by default error: aborting due to previous error For more information about this error, try `rustc --explain E0282`. error: Could not compile `alchemy-cocoa`. warning: build failed, waiting for other jobs to finish... error: build failed ``` ## Checklist - [x] I have already looked over the [issue tracker](https://github.com/ryanmcgrath/alchemy/issues) for similar issues. - [x] This issue can be reproduced on Rust's stable channel. (Your issue will be closed if this is not the case)

ryanmcgrath commented

2020-03-24 12:35:12 -07:00

(Migrated from github.com)

Heya - thanks for taking interest. I appreciate the Rust community's interest in GUI solutions but... well, I should put a notice in the README. :\

You can see this comment I posted on Reddit when it came up there recently for more context - I'd like to return to this eventually but it's just a bit heavy for me right now. If you're interested in following my work in this area, you can check out appkit-rs, which is a Cocoa/AppKit wrapper that'd end up being used here whenever I can return to it.

Heya - thanks for taking interest. I appreciate the Rust community's interest in GUI solutions but... well, I should put a notice in the README. :\ [You can see this comment I posted on Reddit when it came up there recently for more context](https://old.reddit.com/r/rust/comments/flsrq5/alchemy_a_new_rust_gui_framework/fl1f1hn/) - I'd like to return to this eventually but it's just a bit heavy for me right now. If you're interested in following my work in this area, you can check out [appkit-rs](https://github.com/ryanmcgrath/appkit-rs), which is a Cocoa/AppKit wrapper that'd end up being used here whenever I can return to it.

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