Struct Collection 

pub struct Collection(/* private fields */);

Implementations

impl Collection

pub fn new() -> Self

创建一个空集合

pub fn new_string(value: String) -> Self

pub fn new_integer(value: Integer) -> Self

pub fn new_decimal(value: Decimal) -> Self

pub fn new_datetime(value: DateTime) -> Self

pub fn new_boolean(value: Boolean) -> Self

pub fn new_any(value: Box<dyn Executor>) -> Self

pub fn first(&self) -> Option<&Box<dyn Executor>>

pub fn count(&self) -> usize

pub fn combine(&mut self, other: Collection)

pub fn push(&mut self, value: Box<dyn Executor>)

pub fn empty(&self) -> bool

pub fn exists(&self) -> bool

pub fn to_integer(&self) -> Result<Option<Integer>>

pub fn to_boolean(&self) -> Result<Option<bool>>

pub fn all_true(&self) -> Result<bool>

pub fn element( self, symbol: &String, index: &Option<usize>, ) -> Result<Collection>

pub fn filter(self, criteria: &Expr) -> Result<Collection>

pub fn call( self, symbol: &String, args: &Option<Vec<Expr>>, ) -> Result<Collection>

pub fn single(self) -> Result<Collection>

pub fn eq(self, right: Collection) -> Result<Collection>

左侧集合与右侧集合相等 规则：

1. 两侧任何一侧为空，则结果为空
2. 如果两侧集合数量不相等，则结果为false

pub fn not(self) -> Result<Collection>

pub fn gt(self, _right: Collection) -> Result<Collection>

pub fn ge(self, _right: Collection) -> Result<Collection>

pub fn lt(self, _right: Collection) -> Result<Collection>

pub fn le(self, _right: Collection) -> Result<Collection>

Trait Implementations

impl Add for Collection

type Output = Result<Collection, FhirError>

The resulting type after applying the + operator.

fn add(self, rhs: Self) -> Self::Output

Performs the + operation.

impl BitAnd for Collection

type Output = Result<Option<bool>, FhirError>

The resulting type after applying the & operator.

fn bitand(self, rhs: Self) -> Self::Output

Performs the & operation.

impl BitOr for Collection

type Output = Result<Option<bool>, FhirError>

The resulting type after applying the | operator.

fn bitor(self, rhs: Self) -> Self::Output

Performs the | operation.

impl BitXor for Collection

type Output = Result<Option<bool>, FhirError>

The resulting type after applying the ^ operator.

fn bitxor(self, rhs: Self) -> Self::Output

Performs the ^ operation.

impl Debug for Collection

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

Formats the value using the given formatter.

impl Div for Collection

type Output = Result<Collection, FhirError>

The resulting type after applying the / operator.

fn div(self, _rhs: Self) -> Self::Output

Performs the / operation.

impl Mul for Collection

type Output = Result<Collection, FhirError>

The resulting type after applying the * operator.

fn mul(self, _rhs: Self) -> Self::Output

Performs the * operation.

impl Sub for Collection

type Output = Result<Collection, FhirError>

The resulting type after applying the - operator.

fn sub(self, _rhs: Self) -> Self::Output

Performs the - operation.