Struct Closure 

pub struct Closure { /* private fields */ }

A Parse implementation whose behaviour is supplied by closures.

Reach for this instead of a full impl Parse when the parser is small, stateless, or a one-off adapter. See the module docs for a complete example.

Implementations

impl Closure

pub fn new<N: AsRef<str>, F: AsRef<str>>( name: N, supported_format: F, parser: BoxedParseFn, ) -> Self

Build a closure-backed parser.

• name — the parser name used in error messages.
• supported_format — the single format extension this parser handles (widen later with Closure::with_format_list).
• parser — the closure run by parse.

The auto-detection probe defaults to abstaining (None); set one with Closure::with_validator.

pub fn with_validator(self, validator: BoxedValidatorFn) -> Self

Attach an auto-detection probe (see BoxedValidatorFn) used when a payload has no format hint.

pub fn with_format_list<N: AsRef<str>>(self, format_list: &[N]) -> Self

Replace the list of format extensions this parser handles (e.g. ["yml", "yaml"]).

Trait Implementations

impl Parse for Closure

fn name(&self) -> &str

Human-readable name used in error messages.

fn supported_format_list(&self) -> Vec<String>

Format extensions this parser handles (e.g. ["json"], ["yml", "yaml"]).

fn parse(&self, source: &Source, bytes: &[u8]) -> Result<LocatedValue, Error>

Parse bytes into a LocatedValue tree.

fn is_format_supported(&self, bytes: &[u8]) -> Option<bool>

Probe bytes for auto-detection when Payload::maybe_format is None.