Enum Syntax 

pub enum Syntax {
    Unterminated {
        offset: usize,
    },
    EmptyRef,
    Nested {
        body: String,
    },
    EmptyEnvName,
    EmptySegment {
        body: String,
    },
    BadIndex {
        body: String,
    },
}

A malformed reference.

Carries the offending text or offset and nothing else — no key path (the caller knows where it was reading) and no flag names.

Variants

Unterminated

${ with no } after it.

Fields

offset: usize

EmptyRef

${} — a reference to nothing.

Nested

${a${b}}. Finding the end of a reference is find('}'), so a nested ${ has no reading that is not a guess.

Fields

body: String

EmptyEnvName

${env:} — the namespace with no variable after it. Raised downstream, where the prefix is recognised, but it is the same class of mistake.

EmptySegment

${a..b} — a dotted path with an empty segment. Also raised downstream, where the body is parsed as a reference path.

Fields

body: String

BadIndex

${servers[x]} — a bracket step that is not an array index: empty, non-numeric, too big, or unclosed. Also raised downstream.

Fields

body: String

Trait Implementations

impl Clone for Syntax

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Syntax

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

Formats the value using the given formatter.

impl Display for Syntax

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

Formats the value using the given formatter.

impl Eq for Syntax

impl Error for Syntax

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 Syntax

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Syntax