Enum rustc_middle::thir::ExprKind

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pub enum ExprKind<'tcx> {
Show 40 variants    Scope {
        region_scope: Scope,
        lint_level: LintLevel,
        value: ExprId,
    },
    Box {
        value: ExprId,
    },
    If {
        if_then_scope: Scope,
        cond: ExprId,
        then: ExprId,
        else_opt: Option<ExprId>,
    },
    Call {
        ty: Ty<'tcx>,
        fun: ExprId,
        args: Box<[ExprId]>,
        from_hir_call: bool,
        fn_span: Span,
    },
    Deref {
        arg: ExprId,
    },
    Binary {
        op: BinOp,
        lhs: ExprId,
        rhs: ExprId,
    },
    LogicalOp {
        op: LogicalOp,
        lhs: ExprId,
        rhs: ExprId,
    },
    Unary {
        op: UnOp,
        arg: ExprId,
    },
    Cast {
        source: ExprId,
    },
    Use {
        source: ExprId,
    },
    NeverToAny {
        source: ExprId,
    },
    Pointer {
        cast: PointerCast,
        source: ExprId,
    },
    Loop {
        body: ExprId,
    },
    Let {
        expr: ExprId,
        pat: Pat<'tcx>,
    },
    Match {
        scrutinee: ExprId,
        arms: Box<[ArmId]>,
    },
    Block {
        body: Block,
    },
    Assign {
        lhs: ExprId,
        rhs: ExprId,
    },
    AssignOp {
        op: BinOp,
        lhs: ExprId,
        rhs: ExprId,
    },
    Field {
        lhs: ExprId,
        name: Field,
    },
    Index {
        lhs: ExprId,
        index: ExprId,
    },
    VarRef {
        id: HirId,
    },
    UpvarRef {
        closure_def_id: DefId,
        var_hir_id: HirId,
    },
    Borrow {
        borrow_kind: BorrowKind,
        arg: ExprId,
    },
    AddressOf {
        mutability: Mutability,
        arg: ExprId,
    },
    Break {
        label: Scope,
        value: Option<ExprId>,
    },
    Continue {
        label: Scope,
    },
    Return {
        value: Option<ExprId>,
    },
    ConstBlock {
        value: &'tcx Const<'tcx>,
    },
    Repeat {
        value: ExprId,
        count: &'tcx Const<'tcx>,
    },
    Array {
        fields: Box<[ExprId]>,
    },
    Tuple {
        fields: Box<[ExprId]>,
    },
    Adt(Box<Adt<'tcx>>),
    PlaceTypeAscription {
        source: ExprId,
        user_ty: Option<Canonical<'tcx, UserType<'tcx>>>,
    },
    ValueTypeAscription {
        source: ExprId,
        user_ty: Option<Canonical<'tcx, UserType<'tcx>>>,
    },
    Closure {
        closure_id: DefId,
        substs: UpvarSubsts<'tcx>,
        upvars: Box<[ExprId]>,
        movability: Option<Movability>,
        fake_reads: Vec<(ExprId, FakeReadCause, HirId)>,
    },
    Literal {
        literal: &'tcx Const<'tcx>,
        user_ty: Option<Canonical<'tcx, UserType<'tcx>>>,
        const_id: Option<DefId>,
    },
    StaticRef {
        literal: &'tcx Const<'tcx>,
        def_id: DefId,
    },
    InlineAsm {
        template: &'tcx [InlineAsmTemplatePiece],
        operands: Box<[InlineAsmOperand<'tcx>]>,
        options: InlineAsmOptions,
        line_spans: &'tcx [Span],
    },
    ThreadLocalRef(DefId),
    Yield {
        value: ExprId,
    },
}

Variants

`Scope`

Fields

region_scope: Scope

lint_level: LintLevel

value: ExprId

Scopes are used to explicitly mark destruction scopes, and to track the HirId of the expressions within the scope.

`Box`

Fields

value: ExprId

A box <value> expression.

`If`

Fields

if_then_scope: Scope

cond: ExprId

then: ExprId

else_opt: Option<ExprId>

An if expression.

`Call`

Fields

ty: Ty<'tcx>

The type of the function. This is often a FnDef or a FnPtr.

fun: ExprId

The function itself.

args: Box<[ExprId]>

The arguments passed to the function.

Note: in some cases (like calling a closure), the function call f(...args) gets rewritten as a call to a function trait method (e.g. FnOnce::call_once(f, (...args))).

from_hir_call: bool

Whether this is from an overloaded operator rather than a function call from HIR. true for overloaded function call.

fn_span: Span

The span of the function, without the dot and receiver (e.g. foo(a, b) in x.foo(a, b)).

A function call. Method calls and overloaded operators are converted to plain function calls.

`Deref`

Fields

arg: ExprId

A non-overloaded dereference.

`Binary`

Fields

op: BinOp

lhs: ExprId

rhs: ExprId

A non-overloaded binary operation.

`LogicalOp`

Fields

op: LogicalOp

lhs: ExprId

rhs: ExprId

A logical operation. This is distinct from BinaryOp because the operands need to be lazily evaluated.

`Unary`

Fields

op: UnOp

arg: ExprId

A non-overloaded unary operation. Note that here the deref (*) operator is represented by ExprKind::Deref.

`Cast`

Fields

source: ExprId

A cast: <source> as <type>. The type we cast to is the type of the parent expression.

`Use`

Fields

source: ExprId

`NeverToAny`

Fields

source: ExprId

A coercion from ! to any type.

`Pointer`

Fields

cast: PointerCast

source: ExprId

A pointer cast. More information can be found in PointerCast.

`Loop`

Fields

body: ExprId

A loop expression.

`Let`

Fields

expr: ExprId

pat: Pat<'tcx>

`Match`

Fields

scrutinee: ExprId

arms: Box<[ArmId]>

A match expression.

`Block`

Fields

body: Block

A block.

`Assign`

Fields

lhs: ExprId

rhs: ExprId

An assignment: lhs = rhs.

`AssignOp`

Fields

op: BinOp

lhs: ExprId

rhs: ExprId

A non-overloaded operation assignment, e.g. lhs += rhs.

`Field`

Fields

lhs: ExprId

name: Field

This can be a named (.foo) or unnamed (.0) field.

Access to a struct or tuple field.

`Index`

Fields

lhs: ExprId

index: ExprId

A non-overloaded indexing operation.

`VarRef`

Fields

id: HirId

A local variable.

`UpvarRef`

Fields

closure_def_id: DefId

DefId of the closure/generator

var_hir_id: HirId

HirId of the root variable

Used to represent upvars mentioned in a closure/generator

`Borrow`

Fields

borrow_kind: BorrowKind

arg: ExprId

A borrow, e.g. &arg.

`AddressOf`

Fields

mutability: Mutability

arg: ExprId

A &raw [const|mut] $place_expr raw borrow resulting in type *[const|mut] T.

`Break`

Fields

label: Scope

value: Option<ExprId>

A break expression.

`Continue`

Fields

label: Scope

A continue expression.

`Return`

Fields

value: Option<ExprId>

A return expression.

`ConstBlock`

Fields

value: &'tcx Const<'tcx>

An inline const block, e.g. const {}.

`Repeat`

Fields

value: ExprId

count: &'tcx Const<'tcx>

An array literal constructed from one repeated element, e.g. [1; 5].

`Array`

Fields

fields: Box<[ExprId]>

An array, e.g. [a, b, c, d].

`Tuple`

Fields

fields: Box<[ExprId]>

A tuple, e.g. (a, b, c, d).

`Adt(Box<Adt<'tcx>>)`

An ADT constructor, e.g. Foo {x: 1, y: 2}.

`PlaceTypeAscription`

Fields

source: ExprId

user_ty: Option<Canonical<'tcx, UserType<'tcx>>>

Type that the user gave to this expression

A type ascription on a place.

`ValueTypeAscription`

Fields

source: ExprId

user_ty: Option<Canonical<'tcx, UserType<'tcx>>>

Type that the user gave to this expression

A type ascription on a value, e.g. 42: i32.

`Closure`

Fields

closure_id: DefId

substs: UpvarSubsts<'tcx>

upvars: Box<[ExprId]>

movability: Option<Movability>

fake_reads: Vec<(ExprId, FakeReadCause, HirId)>

A closure definition.

`Literal`

Fields

literal: &'tcx Const<'tcx>

user_ty: Option<Canonical<'tcx, UserType<'tcx>>>

const_id: Option<DefId>

The DefId of the const item this literal was produced from, if this is not a user-written literal value.

A literal.

`StaticRef`

Fields

literal: &'tcx Const<'tcx>

def_id: DefId

A literal containing the address of a static.

This is only distinguished from Literal so that we can register some info for diagnostics.

`InlineAsm`

Fields

template: &'tcx [InlineAsmTemplatePiece]

operands: Box<[InlineAsmOperand<'tcx>]>

options: InlineAsmOptions

line_spans: &'tcx [Span]

Inline assembly, i.e. asm!().

`ThreadLocalRef(DefId)`

An expression taking a reference to a thread local.

`Yield`

Fields

value: ExprId

A yield expression.

Trait Implementations

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impl<'tcx> Debug for ExprKind<'tcx>

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

Formats the value using the given formatter. Read more

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impl<'tcx, '__ctx> HashStable<StableHashingContext> for ExprKind<'tcx>

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fn hash_stable(
 &self,
 hcx: &mut StableHashingContext<'ctx>,
 __hasher: &mut StableHasher
)

Auto Trait Implementations

impl<'tcx> !RefUnwindSafe for ExprKind

impl<'tcx> !Send for ExprKind

impl<'tcx> !Sync for ExprKind

impl<'tcx> Unpin for ExprKind

impl<'tcx> !UnwindSafe for ExprKind

Blanket Implementations

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

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pub fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for T where
T: ?Sized,

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pub fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T where
T: ?Sized,

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pub fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<Ctxt, T> DepNodeParams<Ctxt> for T where
Ctxt: DepContext,
T: for<'a> HashStable<StableHashingContext<'a>> + Debug,

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pub default fn fingerprint_style() -> FingerprintStyle

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pub default fn to_fingerprint(&self, tcx: Ctxt) -> Fingerprint

This method turns the parameters of a DepNodeConstructor into an opaque Fingerprint to be used in DepNode. Not all DepNodeParams support being turned into a Fingerprint (they don’t need to if the corresponding DepNode is anonymous). Read more

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pub default fn to_debug_str(&self, Ctxt) -> String

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pub default fn recover(
Ctxt,
&DepNode<<Ctxt as DepContext>::DepKind>
) -> Option<T>

This method tries to recover the query key from the given DepNode, something which is needed when forcing DepNodes during red-green evaluation. The query system will only call this method if fingerprint_style() is not FingerprintStyle::Opaque. It is always valid to return None here, in which case incremental compilation will treat the query as having changed instead of forcing it. Read more

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impl<T> From<T> for T

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pub fn from(t: T) -> T

Performs the conversion.

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impl<T, U> Into for T where
U: From<T>,

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pub fn into(self) -> U

Performs the conversion.

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impl<T> MaybeResult<T> for T

impl<T, U> TryFrom for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

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

Performs the conversion.

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impl<T, U> TryInto for T where
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

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pub fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

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impl<'a, T> Captures<'a> for T where
T: ?Sized,

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 80 bytes

Size for each variant:

Scope: 23 bytes
Box: 7 bytes
If: 23 bytes
Call: 39 bytes
Deref: 7 bytes
Binary: 11 bytes
LogicalOp: 11 bytes
Unary: 7 bytes
Cast: 7 bytes
Use: 7 bytes
NeverToAny: 7 bytes
Pointer: 7 bytes
Loop: 7 bytes
Let: 31 bytes
Match: 23 bytes
Block: 63 bytes
Assign: 11 bytes
AssignOp: 11 bytes
Field: 11 bytes
Index: 11 bytes
VarRef: 11 bytes
UpvarRef: 19 bytes
Borrow: 7 bytes
AddressOf: 7 bytes
Break: 15 bytes
Continue: 11 bytes
Return: 7 bytes
ConstBlock: 15 bytes
Repeat: 15 bytes
Array: 23 bytes
Tuple: 23 bytes
Adt: 15 bytes
PlaceTypeAscription: 63 bytes
ValueTypeAscription: 63 bytes
Closure: 71 bytes
Literal: 79 bytes
StaticRef: 23 bytes
InlineAsm: 55 bytes
ThreadLocalRef: 11 bytes
Yield: 7 bytes