Struct DisplayContext 

pub struct DisplayContext { /* private fields */ }

Display context for formatting numbers with consistent precision per currency.

Tracks the maximum number of decimal places seen for each currency during parsing, and provides methods to format numbers with that precision.

Implementations

impl DisplayContext

pub fn new() -> Self

Create a new empty display context.

pub fn update(&mut self, number: Decimal, currency: &str)

Update the display context with a number for a currency.

This records the decimal precision of the number (number of digits after the decimal point) and updates the maximum precision seen for that currency.

pub fn update_from(&mut self, other: &Self)

Update the display context from another display context.

Takes the maximum precision for each currency from both contexts.

pub const fn set_render_commas(&mut self, render_commas: bool)

Set the render_commas flag.

pub const fn render_commas(&self) -> bool

Get the render_commas flag.

pub fn set_fixed_precision(&mut self, currency: &str, precision: u32)

Set a fixed precision for a currency (from option "display_precision").

Fixed precision takes precedence over inferred precision.

pub fn get_precision(&self, currency: &str) -> Option<u32>

Get the precision for a currency.

Returns the fixed precision if set, otherwise the maximum precision seen, or None if the currency has never been seen.

pub fn format(&self, number: Decimal, currency: &str) -> String

Format a decimal number for a currency using the tracked precision.

If the currency has been seen, formats with the maximum precision. Otherwise, formats with the number’s natural precision (no trailing zeros). Uses half-up rounding to match Python beancount behavior.

pub fn format_amount(&self, number: Decimal, currency: &str) -> String

Format an amount (number + currency) using the tracked precision.

Trait Implementations

impl Clone for DisplayContext

fn clone(&self) -> DisplayContext

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DisplayContext

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

Formats the value using the given formatter.

impl Default for DisplayContext

fn default() -> DisplayContext

Returns the “default value” for a type.