Enum InterpolationErrorKind 

pub enum InterpolationErrorKind {
    MissingRequiredVariable {
        variable: String,
        message: String,
    },
    CircularReference {
        cycle: Vec<String>,
    },
    InvalidSyntax {
        expression: String,
        reason: &'static str,
    },
}

Specific interpolation failure kinds.

Variants

MissingRequiredVariable

A ${VAR:?message} or ${VAR?message} expansion failed.

Fields

variable: String

The missing variable name.

message: String

The final error message after nested interpolation, when any.

CircularReference

A cycle was found while recursively expanding values.

Fields

cycle: Vec<String>

The cycle path, including the repeated key at the end.

InvalidSyntax

${...} contained invalid syntax.

Fields

expression: String

The offending inner expression.

reason: &'static str

A short explanation of what was invalid.

Trait Implementations

impl Clone for InterpolationErrorKind

fn clone(&self) -> InterpolationErrorKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for InterpolationErrorKind

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

Formats the value using the given formatter.

impl Display for InterpolationErrorKind

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

Formats the value using the given formatter.

impl Eq for InterpolationErrorKind

impl PartialEq for InterpolationErrorKind

fn eq(&self, other: &InterpolationErrorKind) -> 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 StructuralPartialEq for InterpolationErrorKind