Enum ErrorKind 

#[non_exhaustive]
pub enum ErrorKind {
    Io,
    UndefinedVariable,
    Syntax,
    MissingParams,
    TypeMismatch,
    UnknownFilter,
    IncludeNotFound,
    DeclarationsMutated,
    ExtraParams,
    Panic,
}

A stable, Copy categorisation of a TemplateError.

This mirrors the TemplateError variants but drops their payloads, giving a discriminant that is cheap to pass around and stable across releases. It is primarily intended for FFI and language bindings that expose a typed-error hierarchy of their own.

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.

Io

I/O error while loading a template file. See TemplateError::Io.

UndefinedVariable

A referenced variable was not found. See TemplateError::UndefinedVariable.

Syntax

Syntax error in the template. See TemplateError::Syntax.

MissingParams

Missing required parameters. See TemplateError::MissingParams.

TypeMismatch

Type mismatch. See TemplateError::TypeMismatch.

UnknownFilter

Unknown filter name. See TemplateError::UnknownFilter.

IncludeNotFound

Include file not found. See TemplateError::IncludeNotFound.

DeclarationsMutated

Declarations mutated at runtime. See TemplateError::DeclarationsMutated.

ExtraParams

Extra undeclared parameters. See TemplateError::ExtraParams.

Panic

Explicit {% panic(...) %}. See TemplateError::Panic.

Implementations

impl ErrorKind

pub const fn as_str(self) -> &'static str

Return the stable, machine-readable identifier for this kind.

These identifiers are part of the public contract (they cross the FFI boundary), so they must not change between releases.

Trait Implementations

impl Clone for ErrorKind

fn clone(&self) -> ErrorKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ErrorKind

impl Debug for ErrorKind

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

Formats the value using the given formatter.

impl Display for ErrorKind

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

Formats the value using the given formatter.

impl Eq for ErrorKind

impl Hash for ErrorKind

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for ErrorKind

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ErrorKind