Struct WrapWidth 

pub struct WrapWidth(pub usize);

textwidth, resolved for a specific buffer — the column reflow targets and, when autowrap allows, the column typing breaks at.

A newtype rather than a bare usize, and that is load-bearing. It is carried by two env structs (GrammarEnv and the actor’s DispatchEnv), both of which derive Default for their ~40 hand-built call sites. A bare usize defaults to 0, which is not a column anything can wrap at — so every one of those sites would silently get a reflow that does nothing, and the bug would look like “gq is broken in tests but works in the editor”. Giving the type a meaningful default puts the answer in one place and makes a third env struct impossible to get wrong.

Same reasoning that made crate::IndentUnit a type rather than three loose fields.

Tuple Fields

0: usize

Implementations

impl WrapWidth

pub fn columns(self) -> usize

The target column.

Trait Implementations

impl Clone for WrapWidth

fn clone(&self) -> WrapWidth

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for WrapWidth

impl Debug for WrapWidth

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

Formats the value using the given formatter.

impl Default for WrapWidth

fn default() -> Self

Returns the “default value” for a type.

impl Eq for WrapWidth

impl From<usize> for WrapWidth

fn from(n: usize) -> Self

Converts to this type from the input type.

impl Ord for WrapWidth

fn cmp(&self, other: &WrapWidth) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for WrapWidth

fn eq(&self, other: &WrapWidth) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl PartialOrd for WrapWidth

fn partial_cmp(&self, other: &WrapWidth) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for WrapWidth