Enum HelperError 

pub enum HelperError {
    Message(String),
    BlockTemplate(String),
    BlockTemplateNotAllowed(String),
    ArityExact(String, usize),
    ArityRange(String, usize, usize),
    ArgumentTypeString(String, usize),
    LookupField(String, String),
    InvalidNumericalOperand(String),
    TypeAssert(String, String, String),
    Syntax(SyntaxError),
    Render(Box<RenderError>),
    Io(IoError),
    Json(Error),
}

Errors generated by helpers.

Variants

Message(String)

Generic error message for helpers.

BlockTemplate(String)

Error when asserting that a helper expects an inner template.

BlockTemplateNotAllowed(String)

Error when asserting that a helper does not allow an inner template.

ArityExact(String, usize)

Error when supplied arguments do not match an exact arity.

ArityRange(String, usize, usize)

Error when supplied arguments do not match an arity range.

ArgumentTypeString(String, usize)

Error when a helper expects a string argument.

LookupField(String, String)

Error when a field could not be resolved.

InvalidNumericalOperand(String)

Error when the operand to a numerical helper is invalid (not a number).

TypeAssert(String, String, String)

Error when a type assertion fails,

Syntax(SyntaxError)

Proxy for syntax errors that occur via helpers.

For example when dynamically evaluating paths passed to the evaluate() function.

Render(Box<RenderError>)

Proxy for render errors that occur via helpers; for example when rendering inner templates.

Io(IoError)

Proxy I/O errors.

Json(Error)

Proxy JSON errors.

Implementations

impl HelperError

pub fn new<S: AsRef<str>>(msg: S) -> Self

Create a new helper error with the given message.

Trait Implementations

impl Debug for HelperError

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

Formats the value using the given formatter.

impl Display for HelperError

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

Formats the value using the given formatter.

impl Error for HelperError

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 From<Box<RenderError>> for HelperError

fn from(source: Box<RenderError>) -> Self

Converts to this type from the input type.

impl From<Error> for HelperError

fn from(source: Error) -> Self

Converts to this type from the input type.

impl From<Error> for HelperError

fn from(err: Error) -> Self

Converts to this type from the input type.

impl From<HelperError> for RenderError

fn from(source: HelperError) -> Self

Converts to this type from the input type.

impl From<IoError> for HelperError

fn from(source: IoError) -> Self

Converts to this type from the input type.

impl From<SyntaxError> for HelperError

fn from(source: SyntaxError) -> Self

Converts to this type from the input type.