Enum Error 

pub enum Error<'a, E> {
    UnclosedRegion {
        source: &'a str,
        range: Range<usize>,
    },
    UnexpectedClosingBrace {
        index: usize,
    },
    UnexpectedOpeningBrace {
        index: usize,
    },
    BadReplacement {
        key: &'a str,
        range: Range<usize>,
        error: E,
    },
    WriteFailed(Error),
}

Any error that occurs when filling a template string.

Template parsing and filling is all done in a single pass; so a failed replacement due to an unknown key will shadow a syntax error later in the string.

Variants

UnclosedRegion

A template region was not closed. That is, an opening curly brace ({) with no matching closing curly brace (}).

Example:

"Hello, {thing"

Fields

source: &'a str

The text of the unclosed region, which will start with { and contain no other curly braces.

range: Range<usize>

The indexes of source within the template string.

UnexpectedClosingBrace

An unescaped closing curly brace (}) was found, outside a template region.

Examples:

"Hello, thing}!"
"Hello, {name}, look at my magnificent moustache: (}-:"
"Hello, {name}}!"

Fields

index: usize

The index of the closing brace within the template string.

UnexpectedOpeningBrace

An opening curly brace ({) was found within a template region.

Examples:

"Hello, {thing{{sadness}}}"

Fields

index: usize

The index of the opening brace within the template string.

BadReplacement

The filler returned an error for the specified key.

Fields

key: &'a str

The key on which the filler failed. Curly braces not included.

range: Range<usize>

The indexes of key within the template string.

error: E

The error value returned by the filler.

WriteFailed(Error)

Writing to the output failed.

Trait Implementations

impl<'a, E: Debug> Debug for Error<'a, E>

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

Formats the value using the given formatter.

impl<'a, E> Display for Error<'a, E>

where E: Display,

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

Formats the value using the given formatter.

impl<'a, E> Error for Error<'a, E>

where E: Error + 'static,

Available on crate feature std only.

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<'a, E> From<Error> for Error<'a, E>

fn from(e: Error) -> Self

Converts to this type from the input type.

impl<'a, E: PartialEq> PartialEq for Error<'a, E>

fn eq(&self, other: &Error<'a, E>) -> bool

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'a, E: Eq> Eq for Error<'a, E>

impl<'a, E> StructuralPartialEq for Error<'a, E>