Enum rtlola_parser::ast::ExpressionKind[−][src]

pub enum ExpressionKind {

Show variants    Lit(Literal),
    Ident(Ident),
    StreamAccess(Box<Expression>, StreamAccessKind),
    Default(Box<Expression>, Box<Expression>),
    Offset(Box<Expression>, Offset),
    DiscreteWindowAggregation {
        expr: Box<Expression>,
        duration: Box<Expression>,
        wait: bool,
        aggregation: WindowOperation,
    },
    SlidingWindowAggregation {
        expr: Box<Expression>,
        duration: Box<Expression>,
        wait: bool,
        aggregation: WindowOperation,
    },
    Binary(BinOp, Box<Expression>, Box<Expression>),
    Unary(UnOp, Box<Expression>),
    Ite(Box<Expression>, Box<Expression>, Box<Expression>),
    ParenthesizedExpression(Option<Box<Parenthesis>>, Box<Expression>, Option<Box<Parenthesis>>),
    MissingExpression,
    Tuple(Vec<Expression>),
    Field(Box<Expression>, Ident),
    Method(Box<Expression>, FunctionName, Vec<Type>, Vec<Expression>),
    Function(FunctionName, Vec<Type>, Vec<Expression>),

}
Expand description

The Ast representation of a single expression

Variants

Lit(Literal)

A literal, e.g., 1, "foo"

Ident(Ident)

An identifier, e.g., foo

Accessing a stream

A default expression, e.g., a.defaults(to: 0)

Offset(Box<Expression>, Offset)

An offset expression, e.g., a.offset(by: -1)

DiscreteWindowAggregation

A discrete window with a duration duration as an integer constant and aggregation function aggregation

Show fields

Fields of DiscreteWindowAggregation

expr: Box<Expression>

The accesses stream

duration: Box<Expression>

The duration of the window

wait: bool

Flag to mark that the window returns only a value if the complete duration has passed

aggregation: WindowOperation

The aggregation function

SlidingWindowAggregation

A sliding window with duration duration and aggregation function aggregation

Show fields

Fields of SlidingWindowAggregation

expr: Box<Expression>

The accesses stream

duration: Box<Expression>

The duration of the window

wait: bool

Flag to mark that the window returns only a value if the complete duration has passed

aggregation: WindowOperation

The aggregation function

A binary operation (For example: a + b, a * b)

Unary(UnOp, Box<Expression>)

A unary operation (For example: !x, *x)

An if-then-else expression

ParenthesizedExpression(Option<Box<Parenthesis>>, Box<Expression>, Option<Box<Parenthesis>>)

An expression enveloped in parentheses

MissingExpression

An expression was expected, e.g., after an operator like *

Tuple(Vec<Expression>)

A tuple expression

Field(Box<Expression>, Ident)

Access of a named (obj.foo) or unnamed (obj.0) struct field

A method call, e.g., foo.bar(-1)

A function call

Trait Implementations

impl Clone for ExpressionKind[src]

fn clone(&self) -> ExpressionKind[src]

Returns a copy of the value. Read more

fn clone_from(&mut self, source: &Self)1.0.0[src]

Performs copy-assignment from source. Read more

impl Debug for ExpressionKind[src]

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

Formats the value using the given formatter. Read more

Auto Trait Implementations

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized, [src]

pub fn type_id(&self) -> TypeId[src]

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
    T: ?Sized, [src]

pub fn borrow(&self) -> &T[src]

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
    T: ?Sized, [src]

pub fn borrow_mut(&mut self) -> &mut T[src]

Mutably borrows from an owned value. Read more

impl<T> From<T> for T[src]

pub fn from(t: T) -> T[src]

Performs the conversion.

impl<T, U> Into<U> for T where
    U: From<T>, [src]

pub fn into(self) -> U[src]

Performs the conversion.

impl<T> Same<T> for T

type Output = T

Should always be Self

impl<T> ToOwned for T where
    T: Clone, [src]

type Owned = T

The resulting type after obtaining ownership.

pub fn to_owned(&self) -> T[src]

Creates owned data from borrowed data, usually by cloning. Read more

pub fn clone_into(&self, target: &mut T)[src]

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T, U> TryFrom<U> for T where
    U: Into<T>, [src]

type Error = Infallible

The type returned in the event of a conversion error.

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]

Performs the conversion.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, [src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>[src]

Performs the conversion.