Enum IcfMeasurementError 

#[non_exhaustive]
pub enum IcfMeasurementError {
    UnresolvedFont,
    EmptyProbes,
    NoProbeBounds,
    NoUsableBounds,
}

Available on crate feature gpui only.

Why an ideographic character-face measurement could not produce an anchor.

The variants describe what was observable through gpui’s public API, not a guessed platform cause. A backend may still substitute a missing glyph — DirectWrite returns .notdef in gpui 0.2.2 — so successful measurement also depends on supplying probes covered by the resolved face.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

UnresolvedFont

The RhythmFont was synthesized without a gpui TextSystem and therefore has no resolved FontId to measure.

EmptyProbes

The probe string was empty.

NoProbeBounds

gpui returned an error instead of bounds for every probe.

On gpui 0.2.2’s CoreText and Linux backends, this is the result when the resolved face covers none of the supplied characters. Other backend errors can produce the same observable result.

NoUsableBounds

At least one probe returned bounds, but none were finite and spanned the alphabetic baseline.

This rejects both unsuitable glyphs and gpui 0.2.2’s Linux advance-only placeholder bounds.

Trait Implementations

impl Clone for IcfMeasurementError

fn clone(&self) -> IcfMeasurementError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for IcfMeasurementError

impl Debug for IcfMeasurementError

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

Formats the value using the given formatter.

impl Display for IcfMeasurementError

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

Formats the value using the given formatter.

impl Eq for IcfMeasurementError

impl Error for IcfMeasurementError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl PartialEq for IcfMeasurementError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for IcfMeasurementError