Struct Context

pub struct Context { /* private fields */ }

Configuration that controls how values are formatted.

This configuration is created when ToDisplay::display_with_context() is called and propagates to all nested display implementations.

This struct is used by the Display implementation to get the current formatting specification.

Implementations

impl Context

pub fn verbose(&self) -> bool

Returns whether verbose formatting is enabled.

When enabled:

• Option values show as Some(v) or None instead of v or -
• Collections may include type information
• Additional details may be included depending on the type

pub fn max_items(&self) -> usize

Returns the maximum number of items to display for collections.

This affects the formatting of slices, vectors, maps, and similar collections. When a collection exceeds this limit, it will be truncated with “…”.

Defaults to 32 items.

pub fn is_local_time(&self) -> bool

Returns whether times should be displayed in local time.

pub fn is_utc_time(&self) -> bool

Returns whether times should be displayed in UTC.

pub fn time_format(&self) -> &'static str

Returns the time format string used for formatting timestamps.

Format options:

• Default/"SIMPLE": "%H:%M:%S%.6f" (e.g., “23:59:59.123456”)
• "FULL": "%Y-%m-%dT%H:%M:%S%.6fZ%z" (e.g., “2024-12-28T23:59:59.123456Z+0800”)
• Custom format string using strftime format specifiers

Trait Implementations

impl Clone for Context

fn clone(&self) -> Context

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Context

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Context

fn default() -> Context

Returns the “default value” for a type.

impl Copy for Context