Gitk on wide displays

This is the original layout of gitk:

 I realized (years ago) that competing for height, while there is abundant space to the sides  is bad.

 

It's better to keep "lists" to the side, while the main diff pane should use the full height.

 

 the changes are in gitk-wide branch

Second 4 months of Rust

Macros

CLAP

Using Clippy

Std...

Reading the pages .....traits defined, Enums, Structs .... and (generic) definitions of the trait for EXTERNAL types. That's why it's listed there, not in the page of those types.

 

Any .....using 

 intrinsics::type_id::<T>()

HashMap ...

 Tricking the HashMap | Ivan Dubrov 

 

!Sized

Generics parameters implicitly constrained to Sized

 

- iterators

-  

Error handling

Option -> Result

std::Result

? expands to ..... return Err(From::from(e)) 

Defining new error types out of lower-level ones:

YT: Mastering Error Handling in Rust: From Panics to thiserror & anyhow | with Nathan Stocks

#[non_exhaustive]

thiserror   -> 

 

#[derive(Error)]

      #[error("message")] 

      ....#[from:] ... 

 

and we can use  derive_more::Error 

Error trait enables the nesting: 

• source()
• provide()   default to None, but can be implemented   

  

YT: A Simpler Way to See Results

 

Anyhow:

https://docs.rs/anyhow/latest/anyhow/index.html

 

Clarifying references with  Claude.io:

https://doc.rust-lang.org/std/primitive.reference.html

Prompts:

Rust references implement all certain traits Copy, Clone etc ..... is it because those traits have only &self methods?
.....  
Yes,true. Those specific Traits are implemented by the definition/semantics of References.  What I meant is the other Traits which .... references having Deref... when implemented for T and containing only &self methods, are therefore implemented for &T.  Or is there anything more profound on that?

Now I know: