Enum ExprKind 

pub enum ExprKind {
    If {
        condition: Expr,
        then: Expr,
        else_: Option<Expr>,
    },
    App {
        head: Expr,
        args: Vec<Expr>,
        generic_args: Vec<GenericValue>,
        bounds_impls: Vec<ImplExpr>,
        trait_: Option<(ImplExpr, Vec<GenericValue>)>,
    },
    Literal(Literal),
    Array(Vec<Expr>),
    Construct {
        constructor: GlobalId,
        is_record: bool,
        is_struct: bool,
        fields: Vec<(GlobalId, Expr)>,
        base: Option<Expr>,
    },
    Match {
        scrutinee: Expr,
        arms: Vec<Arm>,
    },
    Borrow {
        mutable: bool,
        inner: Expr,
    },
    AddressOf {
        mutable: bool,
        inner: Expr,
    },
    Deref(Expr),
    Let {
        lhs: Pat,
        rhs: Expr,
        body: Expr,
    },
    GlobalId(GlobalId),
    LocalId(LocalId),
    Ascription {
        e: Expr,
        ty: Ty,
    },
    Assign {
        lhs: Lhs,
        value: Expr,
    },
    Loop {
        body: Expr,
        kind: Box<LoopKind>,
        state: Option<LoopState>,
        control_flow: Option<ControlFlowKind>,
        label: Option<Symbol>,
    },
    Break {
        value: Expr,
        label: Option<Symbol>,
    },
    Return {
        value: Expr,
    },
    Continue {
        label: Option<Symbol>,
    },
    Closure {
        params: Vec<Pat>,
        body: Expr,
        captures: Vec<Expr>,
    },
    Block {
        body: Expr,
        safety_mode: SafetyKind,
    },
    Quote {
        contents: Quote,
    },
    Resugared(ResugaredExprKind),
    Error(ErrorNode),
}

Describes the shape of an expression.

Variants

If

If expression.

Example:

if x > 0 { 1 } else { 2 }

Fields

condition: Expr

The boolean condition (x > 0 in the example).

then: Expr

The then branch (1 in the example).

else_: Option<Expr>

An optional else branch (Some(2)in the example).

App

Function application.

Example:

f(x, y)

Fields

head: Expr

The head of the function application (or, which function do we apply?).

args: Vec<Expr>

The arguments applied to the function.

generic_args: Vec<GenericValue>

The generic arguments applied to the function.

bounds_impls: Vec<ImplExpr>

If the function requires generic bounds to be called, bounds_impls is a vector of impl. expressions for those bounds.

trait_: Option<(ImplExpr, Vec<GenericValue>)>

If we apply an associated function, contains the impl. expr used.

Literal(Literal)

A literal value.

Example:

42, "hello"

Array(Vec<Expr>)

An array literal.

Example:

[1, 2, 3]

Construct

A constructor application

Example:

MyEnum::MyVariant { x : 1, ...base }

Fields

constructor: GlobalId

The identifier of the constructor we are building (MyEnum::MyVariant in the example).

is_record: bool

Are we constructing a record? E.g. a struct or a variant with named fields. (true in the example)

is_struct: bool

Is this a struct? Neaning, not a variant from an enum. (false in the example)

fields: Vec<(GlobalId, Expr)>

A list of fields ([(x, 1)] in the example).

base: Option<Expr>

The base expression, if any. (Some(base) in the example)

Match

A `match`` expression.

Example:

match x {
    pat1 => expr1,
    pat2 => expr2,
}

Fields

scrutinee: Expr

The expression on which we are matching. (x in the example)

arms: Vec<Arm>

The arms of the match. (pat1 => expr1 and pat2 => expr2 in the example)

Borrow

A reference expression.

Examples:

• &x → mutable: false
• &mut x → mutable: true

Fields

mutable: bool

Is the borrow mutable?

inner: Expr

The expression we are borrowing

AddressOf

Raw borrow

Example:

*const u8

Fields

mutable: bool

Is the raw pointer mutable?

inner: Expr

The expression on which we take a pointer

Deref(Expr)

A dereference

Example:

*x

Let

A let expression used in expressions.

Example:

let x = 1; x + 1

Fields

lhs: Pat

The left-hand side of the let expression. (x in the example)

rhs: Expr

The right-hand side of the let expression. (1 in the example)

body: Expr

The body of the let. (x + 1 in the example)

GlobalId(GlobalId)

A global identifier.

Example:

std::mem::drop

LocalId(LocalId)

A local variable.

Example:

x

Ascription

Type ascription

Fields

e: Expr

The expression being ascribed.

ty: Ty

The type

Assign

Variable mutation

Example:

x = 1

Fields

lhs: Lhs

the left-hand side (place) of the assign

value: Expr

The value we are assigning

Loop

Loop

Example:

'label: loop { body }

Fields

body: Expr

The body of the loop.

kind: Box<LoopKind>

The kind of loop (e.g. while, loop, for…).

state: Option<LoopState>

An optional loop state, that makes explicit the state mutated by the loop.

control_flow: Option<ControlFlowKind>

What kind of control flow is performed by this loop?

label: Option<Symbol>

Optional loop label.

Break

The break exppression, that breaks out of a loop.

Example:

break 'label 3

Fields

value: Expr

The value we break with. By default, this is ().

Example:

loop { break 3; } + 3

label: Option<Symbol>

What loop shall we break? By default, the parent enclosing loop.

Return

Return from a function.

Example:

return 1

Fields

value: Expr

The expression we return (1 in the example).

Continue

Continue (go to next loop iteration)

Example:

continue 'label

Fields

label: Option<Symbol>

The loop we continue.

Closure

Closure (anonymous function)

Example:

|x| x

Fields

params: Vec<Pat>

The parameters of the closure

body: Expr

The body of the closure

captures: Vec<Expr>

The captured expressions

Block

Block of safe or unsafe expression

Example:

unsafe { ... }

Fields

body: Expr

The body of the block.

safety_mode: SafetyKind

The safety of the block.

Quote

A quote is an inlined piece of backend code.

Fields

contents: Quote

The contents of the quote.

Resugared(ResugaredExprKind)

A resugared expression. This variant is introduced before printing only. Phases must not produce this variant.

Error(ErrorNode)

Fallback constructor to carry errors.

Implementations

impl ExprKind

pub fn into_expr(self, span: Span, ty: Ty, attributes: Vec<Attribute>) -> Expr

Convert to full Expr with type, span and attributes

Trait Implementations

impl AstVisitable for ExprKind

fn drive_map<V: AstVisitorMut>(&mut self, v: &mut V)

Recursively visit this type with the provided visitor. This calls the visitor’s visit_$any method if it exists, otherwise visit_inner.

fn drive<V: AstVisitor>(&self, v: &mut V)

Recursively visit this type with the provided visitor. This calls the visitor’s visit_$any method if it exists, otherwise visit_inner.

impl AstVisitable for ExprKind

fn drive<V: AstEarlyExitVisitor>(&self, v: &mut V) -> ControlFlow<V::Break>

Recursively visit this type with the provided visitor. This calls the visitor’s visit_$any method if it exists, otherwise visit_inner.

fn drive_mut<V: AstEarlyExitVisitorMut>( &mut self, v: &mut V, ) -> ControlFlow<V::Break>

Recursively visit this type with the provided visitor. This calls the visitor’s visit_$any method if it exists, otherwise visit_inner.

impl Clone for ExprKind

fn clone(&self) -> ExprKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExprKind

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ExprKind

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'s, V> Drive<'s, V> for ExprKind

where V: Visitor + Visit<'s, Expr> + Visit<'s, Option<Expr>> + Visit<'s, Vec<Expr>> + Visit<'s, Vec<GenericValue>> + Visit<'s, Vec<ImplExpr>> + Visit<'s, Option<(ImplExpr, Vec<GenericValue>)>> + Visit<'s, Literal> + Visit<'s, GlobalId> + Visit<'s, bool> + Visit<'s, Vec<(GlobalId, Expr)>> + Visit<'s, Vec<Arm>> + Visit<'s, Pat> + Visit<'s, LocalId> + Visit<'s, Ty> + Visit<'s, Lhs> + Visit<'s, Box<LoopKind>> + Visit<'s, Option<LoopState>> + Visit<'s, Option<ControlFlowKind>> + Visit<'s, Option<Symbol>> + Visit<'s, Vec<Pat>> + Visit<'s, SafetyKind> + Visit<'s, Quote> + Visit<'s, ResugaredExprKind> + Visit<'s, ErrorNode>,

fn drive_inner(&'s self, visitor: &mut V) -> ControlFlow<V::Break>

Call v.visit() on the immediate contents of self.

impl<'s, V> DriveMut<'s, V> for ExprKind

where V: Visitor + VisitMut<'s, Expr> + VisitMut<'s, Option<Expr>> + VisitMut<'s, Vec<Expr>> + VisitMut<'s, Vec<GenericValue>> + VisitMut<'s, Vec<ImplExpr>> + VisitMut<'s, Option<(ImplExpr, Vec<GenericValue>)>> + VisitMut<'s, Literal> + VisitMut<'s, GlobalId> + VisitMut<'s, bool> + VisitMut<'s, Vec<(GlobalId, Expr)>> + VisitMut<'s, Vec<Arm>> + VisitMut<'s, Pat> + VisitMut<'s, LocalId> + VisitMut<'s, Ty> + VisitMut<'s, Lhs> + VisitMut<'s, Box<LoopKind>> + VisitMut<'s, Option<LoopState>> + VisitMut<'s, Option<ControlFlowKind>> + VisitMut<'s, Option<Symbol>> + VisitMut<'s, Vec<Pat>> + VisitMut<'s, SafetyKind> + VisitMut<'s, Quote> + VisitMut<'s, ResugaredExprKind> + VisitMut<'s, ErrorNode>,

fn drive_inner_mut(&'s mut self, visitor: &mut V) -> ControlFlow<V::Break>

Call v.visit() on the immediate contents of self.

impl<'lt> From<&'lt ExprKind> for FragmentRef<'lt>

fn from(fragment: &'lt ExprKind) -> Self

Converts to this type from the input type.

impl From<ExprKind> for Fragment

fn from(fragment: ExprKind) -> Self

Converts to this type from the input type.

impl Hash for ExprKind

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl JsonSchema for ExprKind

fn schema_name() -> String

The name of the generated JSON Schema.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

fn json_schema(generator: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn is_referenceable() -> bool

Whether JSON Schemas generated for this type should be re-used where possible using the $ref keyword.

impl Ord for ExprKind

fn cmp(&self, other: &ExprKind) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for ExprKind

fn eq(&self, other: &ExprKind) -> 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 PartialOrd for ExprKind

fn partial_cmp(&self, other: &ExprKind) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<'a, 'b, A: 'a + Clone, P: PrettyAst<'a, 'b, A>> Pretty<'a, P, A> for &'b ExprKind

fn pretty(self, allocator: &'a P) -> DocBuilder<'a, P, A>

Converts self into a document

impl Serialize for ExprKind

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for ExprKind

impl StructuralPartialEq for ExprKind