pub trait ToDisplay {
type Displayer<'a>: Display
where Self: 'a;
// Required method
fn display_with_context(&self, context: Context) -> Self::Displayer<'_>;
// Provided method
fn display(&self) -> Self::Displayer<'_> { ... }
}Expand description
Create a displayable instance for a type.
§Usage:
For example, to display an Option<i32>, use .display() to create an instance that is
Display
use to_display::ToDisplay;
assert_eq!(Some(1u32).display().to_string(), "1");If the returned type implements DisplayConfig, it can be further customized with such
as:
.verbose(): to enable verbose mode..max_items(n): display at mostnitems.- …
To implement ToDisplay for a type that implements Display, use #[derive(ToDisplay)].
It displays an Option as Some(value) or None, if verbose is enabled.
and it displays an Option as - or value, if verbose is disabled.
It displays a Result as Ok(value) or Err(error), if verbose is enabled.
It displays a slice as [value1, value2, ...], if the number of items is less than or equal to
max_items.
Required Associated Types§
Required Methods§
Sourcefn display_with_context(&self, context: Context) -> Self::Displayer<'_>
fn display_with_context(&self, context: Context) -> Self::Displayer<'_>
Return an instance that is Display with a provided Context.
User implements this method to create a customized displayable instance.
This method should be called when a DisplayConfig implementation converts its children
item to a DisplayConfig, to inherit the context.
Provided Methods§
Dyn Compatibility§
This trait is not dyn compatible.
In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.