Struct std::fmt::DebugList1.2.0[][src]

#[must_use]
pub struct DebugList<'a, 'b> where
    'b: 'a, 
{ /* fields omitted */ }

A struct to help with fmt::Debug implementations.

This is useful when you wish to output a formatted list of items as a part of your Debug::fmt implementation.

This can be constructed by the Formatter::debug_list method.

Examples

use std::fmt;

struct Foo(Vec<i32>);

impl fmt::Debug for Foo {
    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
        fmt.debug_list().entries(self.0.iter()).finish()
    }
}

// prints "[10, 11]"
println!("{:?}", Foo(vec![10, 11]));Run

Methods

impl<'a, 'b> DebugList<'a, 'b> where
    'b: 'a, 
[src]

Adds a new entry to the list output.

Adds the contents of an iterator of entries to the list output.

Finishes output and returns any error encountered.

Auto Trait Implementations

impl<'a, 'b> !Send for DebugList<'a, 'b>

impl<'a, 'b> !Sync for DebugList<'a, 'b>