where-it-impl-Display? &format!( "used non-generic {} `{}` for generic parameter", opaque_param.kind.descr(), arg, ), what i did I went to defination of arg,, it's GenericArg I check all impl for GenericArg I don't find Display but I can use .to_string() on it

[image] AndyJado: I went to defination of opaque_param.kind.descr(),, it's Region How certain are you that it's a -> Region rather than, say, a fn descr(&self) -> &'static str ?

I cannot find where it impl trait `Display`

help

scottmcm September 20, 2022, 6:04am 2

How certain are you that it's a -> Region rather than, say, a fn descr(&self) -> &'static str?

2 Likes

Topic		Replies	Views
How to display generic function? help	2	2377	September 25, 2019
Function parameter: impl Trait vs &impl Trait help	3	183	December 23, 2023
Impl external trait for non-local parameter (limited only by the other local trait) help	3	475	January 12, 2023
Why does the `ToString` trait exist? help	5	655	March 8, 2020
Multiple Trait implementations based on generic type bound help	4	1466	January 12, 2023

I cannot find where it impl trait `Display`

Related Topics