Enum Expr 

pub enum Expr {
    Lit(Literal),
    Var(String),
    Block(Block),
    Call {
        callee: Box<Expr>,
        args: Vec<Expr>,
    },
    Pipe {
        left: Box<Expr>,
        right: Box<Expr>,
    },
    Try(Box<Expr>),
    Field {
        value: Box<Expr>,
        field: String,
    },
    BinOp {
        op: BinOp,
        lhs: Box<Expr>,
        rhs: Box<Expr>,
    },
    UnaryOp {
        op: UnaryOp,
        expr: Box<Expr>,
    },
    If {
        cond: Box<Expr>,
        then_block: Block,
        else_block: Block,
    },
    Match {
        scrutinee: Box<Expr>,
        arms: Vec<Arm>,
    },
    RecordLit(Vec<RecordLitField>),
    TupleLit(Vec<Expr>),
    ListLit(Vec<Expr>),
    Constructor {
        name: String,
        args: Vec<Expr>,
    },
    Lambda(Box<Lambda>),
    Ascription {
        value: Box<Expr>,
        ty: TypeExpr,
    },
}

Variants

Lit(Literal)

Var(String)

Block(Block)

Call

Fields

callee: Box<Expr>

args: Vec<Expr>

Pipe

Fields

left: Box<Expr>

right: Box<Expr>

Try(Box<Expr>)

expr? postfix.

Field

expr.field

Fields

value: Box<Expr>

field: String

BinOp

Fields

op: BinOp

lhs: Box<Expr>

rhs: Box<Expr>

UnaryOp

Fields

op: UnaryOp

expr: Box<Expr>

If

Fields

cond: Box<Expr>

then_block: Block

else_block: Block

Match

Fields

scrutinee: Box<Expr>

arms: Vec<Arm>

RecordLit(Vec<RecordLitField>)

TupleLit(Vec<Expr>)

ListLit(Vec<Expr>)

Constructor

A bare constructor name (None, Empty) or constructor call (Ok(x)). Since we cannot distinguish a constructor from a variable at parse time, the parser emits Var/Call and the type checker resolves it. This variant is kept for the canonicalizer to lift detected constructors into.

Fields

name: String

args: Vec<Expr>

Lambda(Box<Lambda>)

Ascription

Inline type ascription (expr :: Type). The declared type is checked against the inferred type at type-check time; at runtime it compiles identically to the inner expression (type-only annotation, erased at bytecode level). (#319)

Fields

value: Box<Expr>

ty: TypeExpr

Trait Implementations

impl Clone for Expr

fn clone(&self) -> Expr

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Expr

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Expr

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Expr

fn eq(&self, other: &Expr) -> bool

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for Expr

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Expr