Enum rustc::hir::Expr_
[−]
[src]
pub enum Expr_ {
ExprBox(P<Expr>),
ExprArray(HirVec<Expr>),
ExprCall(P<Expr>, HirVec<Expr>),
ExprMethodCall(Spanned<Name>, HirVec<P<Ty>>, HirVec<Expr>),
ExprTup(HirVec<Expr>),
ExprBinary(BinOp, P<Expr>, P<Expr>),
ExprUnary(UnOp, P<Expr>),
ExprLit(P<Lit>),
ExprCast(P<Expr>, P<Ty>),
ExprType(P<Expr>, P<Ty>),
ExprIf(P<Expr>, P<Block>, 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(CaptureClause, P<FnDecl>, BodyId, Span),
ExprBlock(P<Block>),
ExprAssign(P<Expr>, P<Expr>),
ExprAssignOp(BinOp, P<Expr>, P<Expr>),
ExprField(P<Expr>, Spanned<Name>),
ExprTupField(P<Expr>, Spanned<usize>),
ExprIndex(P<Expr>, P<Expr>),
ExprPath(QPath),
ExprAddrOf(Mutability, P<Expr>),
ExprBreak(Destination, Option<P<Expr>>),
ExprAgain(Destination),
ExprRet(Option<P<Expr>>),
ExprInlineAsm(P<InlineAsm>, HirVec<Expr>, HirVec<Expr>),
ExprStruct(QPath, HirVec<Field>, Option<P<Expr>>),
ExprRepeat(P<Expr>, BodyId),
}rustc_private)Variants
ExprBox(P<Expr>)rustc_private)A box x expression.
ExprArray(HirVec<Expr>)rustc_private)An array ([a, b, c, d])
ExprCall(P<Expr>, HirVec<Expr>)rustc_private)A function call
The first field resolves to the function itself (usually an ExprPath),
and the second field is the list of arguments
ExprMethodCall(Spanned<Name>, HirVec<P<Ty>>, HirVec<Expr>)rustc_private)A method call (x.foo::<Bar, Baz>(a, b, c, d))
The Spanned<Name> is the identifier for the method name.
The vector of Tys are the ascripted type parameters for the method
(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
ExprMethodCall(foo, [Bar, Baz], [x, a, b, c, d]).
ExprTup(HirVec<Expr>)rustc_private)A tuple ((a, b, c ,d))
ExprBinary(BinOp, P<Expr>, P<Expr>)rustc_private)A binary operation (For example: a + b, a * b)
ExprUnary(UnOp, P<Expr>)rustc_private)A unary operation (For example: !x, *x)
ExprLit(P<Lit>)rustc_private)A literal (For example: 1, "foo")
ExprCast(P<Expr>, P<Ty>)rustc_private)A cast (foo as f64)
ExprType(P<Expr>, P<Ty>)rustc_private)ExprIf(P<Expr>, P<Block>, Option<P<Expr>>)rustc_private)An if block, with an optional else block
if expr { block } else { expr }
ExprWhile(P<Expr>, P<Block>, Option<Spanned<Name>>)rustc_private)A while loop, with an optional label
'label: while expr { block }
ExprLoop(P<Block>, Option<Spanned<Name>>, LoopSource)rustc_private)Conditionless loop (can be exited with break, continue, or return)
'label: loop { block }
ExprMatch(P<Expr>, HirVec<Arm>, MatchSource)rustc_private)A match block, with a source that indicates whether or not it is
the result of a desugaring, and if so, which kind.
ExprClosure(CaptureClause, P<FnDecl>, BodyId, Span)rustc_private)A closure (for example, move |a, b, c| {a + b + c}).
The final span is the span of the argument block |...|
ExprBlock(P<Block>)rustc_private)A block ({ ... })
ExprAssign(P<Expr>, P<Expr>)rustc_private)An assignment (a = foo())
ExprAssignOp(BinOp, P<Expr>, P<Expr>)rustc_private)An assignment with an operator
For example, a += 1.
ExprField(P<Expr>, Spanned<Name>)rustc_private)Access of a named struct field (obj.foo)
ExprTupField(P<Expr>, Spanned<usize>)rustc_private)Access of an unnamed field of a struct or tuple-struct
For example, foo.0.
ExprIndex(P<Expr>, P<Expr>)rustc_private)An indexing operation (foo[2])
ExprPath(QPath)rustc_private)Path to a definition, possibly containing lifetime or type parameters.
ExprAddrOf(Mutability, P<Expr>)rustc_private)A referencing operation (&a or &mut a)
ExprBreak(Destination, Option<P<Expr>>)rustc_private)A break, with an optional label to break
ExprAgain(Destination)rustc_private)A continue, with an optional label
ExprRet(Option<P<Expr>>)rustc_private)A return, with an optional value to be returned
ExprInlineAsm(P<InlineAsm>, HirVec<Expr>, HirVec<Expr>)rustc_private)Inline assembly (from asm!), with its outputs and inputs.
ExprStruct(QPath, HirVec<Field>, Option<P<Expr>>)rustc_private)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>.
ExprRepeat(P<Expr>, BodyId)rustc_private)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.
Trait Implementations
impl Clone for Expr_[src]
fn clone(&self) -> Expr_
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)1.0.0
Performs copy-assignment from source. Read more
impl PartialEq for Expr_[src]
fn eq(&self, __arg_0: &Expr_) -> bool
This method tests for self and other values to be equal, and is used by ==. Read more
fn ne(&self, __arg_0: &Expr_) -> bool
This method tests for !=.
impl Eq for Expr_[src]
impl Encodable for Expr_[src]
fn encode<__S: Encoder>(&self, __arg_0: &mut __S) -> Result<(), __S::Error>
🔬 This is a nightly-only experimental API. (rustc_private)
deprecated in favor of rustc-serialize on crates.io
impl Decodable for Expr_[src]
fn decode<__D: Decoder>(__arg_0: &mut __D) -> Result<Expr_, __D::Error>
🔬 This is a nightly-only experimental API. (rustc_private)
deprecated in favor of rustc-serialize on crates.io
impl Hash for Expr_[src]
fn hash<__H: Hasher>(&self, __arg_0: &mut __H)
Feeds this value into the state given, updating the hasher as necessary.
fn hash_slice<H>(data: &[Self], state: &mut H) where H: Hasher1.3.0
Feeds a slice of this type into the state provided.