Struct Parameter 

pub struct Parameter {
    pub name: String,
    pub value: Vec<String>,
    pub modifier: Option<String>,
    pub chains: Vec<ChainLink>,
}

A search parameter as written in the URL.

name and modifier are the first segment and chains the rest, each with its own modifier: subject:Patient.name:exact is subject with modifier Patient, then name with modifier exact.

Fields

name: String

value: Vec<String>

The values as written after =, one per unescaped comma, with their escapes (\, \| \$ \\) still in place. Read them through Parameter::values or Parameter::segmented, which resolve the escapes once the parameter’s type says what a | or $ means; build one from literal text with escape.

modifier: Option<String>

chains: Vec<ChainLink>

Implementations

impl Parameter

pub fn is_chained(&self) -> bool

Whether this parameter follows a reference (subject.name).

pub fn key(&self) -> String

The parameter’s name as written in a URL: subject:Patient.name:exact.

pub fn value_string(&self) -> String

The values as written after = in a URL: the pieces joined by commas, their escapes intact, so a parsed query serialises to what was read.

pub fn values(&self) -> Cow<'_, [String]>

Every value with its escapes resolved. Borrowed from the parameter when none has an escape, the common case.

pub fn each_value(&self) -> impl Iterator<Item = Cow<'_, str>>

Each value with its escapes resolved, borrowed when it has none. For a parser that keeps a slice of the value.

pub fn segmented(&self, separator: char) -> impl Iterator<Item = Segments<'_>>

Each value split on unescaped separators, every segment with its escapes resolved: '|' for a token’s system|code.

Trait Implementations

impl Clone for Parameter

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 Parameter

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

Formats the value using the given formatter.

impl From<(String, Vec<String>)> for Parameter

fn from(tuple: (String, Vec<String>)) -> Self

Converts to this type from the input type.

impl From<(String, Vec<String>, String)> for Parameter

fn from(tuple: (String, Vec<String>, String)) -> Self

Converts to this type from the input type.

impl MetaValue for Parameter

fn fields(&self) -> Vec<&'static str>

fn get_field<'a>(&'a self, field: &str) -> Option<&'a dyn MetaValue>

fn get_field_mut<'a>(&'a mut self, field: &str) -> Option<&'a mut dyn MetaValue>

fn get_index_mut<'a>( &'a mut self, _index: usize, ) -> Option<&'a mut dyn MetaValue>

fn get_index<'a>(&'a self, _index: usize) -> Option<&'a dyn MetaValue>

fn fhir_type(&self) -> &'static str

fn as_any(&self) -> &dyn Any

fn flatten(&self) -> Vec<&dyn MetaValue>

fn is_many(&self) -> bool