Enum BankError 

#[non_exhaustive]
pub enum BankError {
    RailHeadDistance(f64),
    CantExceedsRailHeadDistance {
        cant: f64,
        rail_head_distance: f64,
    },
    CantExceedsVerticalSpan {
        cant: f64,
        span: f64,
    },
    AngleOutOfRange {
        angle: f64,
    },
    OutsideLaw {
        law: &'static str,
        distance: f64,
    },
    AngleInPivot,
    NonFinite,
    RailInCant,
}

Why a banked curve has no section at a station.

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.

RailHeadDistance(f64)

The rail-head distance is not positive and finite.

CantExceedsRailHeadDistance

|D| > b: the rail heads cannot differ by more than they are apart.

Fields

cant: f64

The cant asked for.

rail_head_distance: f64

The rail-head distance b.

CantExceedsVerticalSpan

Under BankConvention::VerticalRise, |D| > b cos(theta): the grade leaves the rail heads too little vertical reach for the cant.

Fields

cant: f64

The cant asked for.

span: f64

b cos(theta).

AngleOutOfRange

A bank angle beyond a quarter turn.

Fields

angle: f64

The angle, radians.

OutsideLaw

The named law is malformed or has no value at the distance.

Fields

law: &'static str

"cant" or "pivot".

distance: f64

The plan distance asked for.

AngleInPivot

The pivot law has an angle-form piece; a pivot is an elevation.

NonFinite

A non-finite cant, angle or grade.

RailInCant

The cant law has a held-rail piece (CantForm::AboutRail); only a pivot derives from the cant.

Trait Implementations

impl Clone for BankError

fn clone(&self) -> BankError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for BankError

impl Debug for BankError

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

Formats the value using the given formatter.

impl Display for BankError

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

Formats the value using the given formatter.

impl Error for BankError

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 BankError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for BankError