Enum MetaExtract 

pub enum MetaExtract<'a> {
    Undefined,
    Identifier(&'a str),
    Meta(&'a Meta),
    Value(&'a MetaValue),
}

What a lookup into a Meta tree found.

Variants

Undefined

Nothing was found.

Identifier(&'a str)

The name itself, present as a bare identifier.

Meta(&'a Meta)

A subtree.

Value(&'a MetaValue)

A literal.

Implementations

impl MetaExtract<'_>

pub fn is_undefined(&self) -> bool

Returns true when nothing was found.

pub fn as_identifier(&self) -> Option<&str>

Returns the identifier, or None for any other kind.

pub fn as_value(&self) -> Option<&MetaValue>

Returns the literal, or None for any other kind.

pub fn as_meta(&self) -> Option<&Meta>

Returns the subtree, or None for any other kind.

Trait Implementations

impl<'a> Debug for MetaExtract<'a>

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

Formats the value using the given formatter.

impl<'a> PartialEq for MetaExtract<'a>

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

Equality operator ==.

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

Inequality operator !=.

impl<'a> StructuralPartialEq for MetaExtract<'a>