Enum rustc::hir::Expr_ [] [src]

pub enum Expr_ {
    ExprBox(P<Expr>),
    ExprArray(HirVec<Expr>),
    ExprCall(P<Expr>, HirVec<Expr>),
    ExprMethodCall(PathSegmentSpanHirVec<Expr>),
    ExprTup(HirVec<Expr>),
    ExprBinary(BinOpP<Expr>, P<Expr>),
    ExprUnary(UnOpP<Expr>),
    ExprLit(P<Lit>),
    ExprCast(P<Expr>, P<Ty>),
    ExprType(P<Expr>, P<Ty>),
    ExprIf(P<Expr>, P<Expr>, Option<P<Expr>>),
    ExprWhile(P<Expr>, P<Block>, Option<Spanned<Name>>),
    ExprLoop(P<Block>, Option<Spanned<Name>>, LoopSource),
    ExprMatch(P<Expr>, HirVec<Arm>, MatchSource),
    ExprClosure(CaptureClauseP<FnDecl>, BodyIdSpanbool),
    ExprBlock(P<Block>),
    ExprAssign(P<Expr>, P<Expr>),
    ExprAssignOp(BinOpP<Expr>, P<Expr>),
    ExprField(P<Expr>, Spanned<Name>),
    ExprTupField(P<Expr>, Spanned<usize>),
    ExprIndex(P<Expr>, P<Expr>),
    ExprPath(QPath),
    ExprAddrOf(MutabilityP<Expr>),
    ExprBreak(DestinationOption<P<Expr>>),
    ExprAgain(Destination),
    ExprRet(Option<P<Expr>>),
    ExprInlineAsm(P<InlineAsm>, HirVec<Expr>, HirVec<Expr>),
    ExprStruct(QPathHirVec<Field>, Option<P<Expr>>),
    ExprRepeat(P<Expr>, BodyId),
    ExprYield(P<Expr>),
}
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Variants

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A box x expression.

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An array ([a, b, c, d])

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A function call

The first field resolves to the function itself (usually an ExprPath), and the second field is the list of arguments

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A method call (x.foo::<'static, Bar, Baz>(a, b, c, d))

The PathSegment/Span represent the method name and its generic arguments (within the angle brackets). The first element of the vector of Exprs is the expression that evaluates to the object on which the method is being called on (the receiver), and the remaining elements are the rest of the arguments. Thus, x.foo::<Bar, Baz>(a, b, c, d) is represented as ExprKind::MethodCall(PathSegment { foo, [Bar, Baz] }, [x, a, b, c, d]).

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A tuple ((a, b, c ,d))

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

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

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A literal (For example: 1, "foo")

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A cast (foo as f64)

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An if block, with an optional else block

if expr { expr } else { expr }

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A while loop, with an optional label

'label: while expr { block }

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Conditionless loop (can be exited with break, continue, or return)

'label: loop { block }

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A match block, with a source that indicates whether or not it is the result of a desugaring, and if so, which kind.

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A closure (for example, move |a, b, c| {a + b + c}).

The final span is the span of the argument block |...|

This may also be a generator literal, indicated by the final boolean, in that case there is an GeneratorClause.

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A block ({ ... })

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An assignment (a = foo())

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An assignment with an operator

For example, a += 1.

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Access of a named struct field (obj.foo)

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Access of an unnamed field of a struct or tuple-struct

For example, foo.0.

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An indexing operation (foo[2])

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Path to a definition, possibly containing lifetime or type parameters.

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A referencing operation (&a or &mut a)

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A break, with an optional label to break

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A continue, with an optional label

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A return, with an optional value to be returned

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Inline assembly (from asm!), with its outputs and inputs.

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A struct or struct-like variant literal expression.

For example, Foo {x: 1, y: 2}, or Foo {x: 1, .. base}, where base is the Option<Expr>.

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An array literal constructed from one repeated element.

For example, [1; 5]. The first expression is the element to be repeated; the second is the number of times to repeat it.

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A suspension point for generators. This is yield <expr> in Rust.

Trait Implementations

impl Clone for Expr_
[src]

[src]

Returns a copy of the value. Read more

1.0.0
[src]

Performs copy-assignment from source. Read more

impl PartialEq for Expr_
[src]

[src]

This method tests for self and other values to be equal, and is used by ==. Read more

[src]

This method tests for !=.

impl Eq for Expr_
[src]

impl Encodable for Expr_
[src]

[src]

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impl Decodable for Expr_
[src]

[src]

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impl Hash for Expr_
[src]

[src]

Feeds this value into the given [Hasher]. Read more

1.3.0
[src]

Feeds a slice of this type into the given [Hasher]. Read more

impl Debug for Expr_
[src]

[src]

Formats the value using the given formatter.

impl<'tcx> HashStable<StableHashingContext<'tcx>> for Expr_
[src]

[src]

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