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some small HIR doc improvements #59273

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merged 2 commits into from
Mar 23, 2019
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some small HIR doc improvements #59273

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bb832c2
some small HIR doc improvements
llogiq Mar 18, 2019
37789c4
Update src/librustc/hir/mod.rs
Centril Mar 19, 2019
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13 changes: 12 additions & 1 deletion src/librustc/hir/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -816,6 +816,9 @@ pub struct MacroDef {
pub legacy: bool,
}

/// A block of statements `{ .. }`, which may have a label (in this case the
/// `targeted_by_break` field will be `true`) and may be `unsafe` by means of
/// the `rules` being anything but `DefaultBlock`.
#[derive(Clone, RustcEncodable, RustcDecodable, Debug, HashStable)]
pub struct Block {
/// Statements in a block.
Expand Down Expand Up @@ -1178,6 +1181,7 @@ impl fmt::Debug for Stmt {
}
}

/// The contents of a statement.
#[derive(Clone, RustcEncodable, RustcDecodable, HashStable)]
pub enum StmtKind {
/// A local (`let`) binding.
Expand Down Expand Up @@ -1208,21 +1212,28 @@ impl StmtKind {
#[derive(Clone, RustcEncodable, RustcDecodable, Debug, HashStable)]
pub struct Local {
pub pat: P<Pat>,
/// Type annotation, if any (otherwise the type will be inferred).
pub ty: Option<P<Ty>>,
/// Initializer expression to set the value, if any.
pub init: Option<P<Expr>>,
pub hir_id: HirId,
pub span: Span,
pub attrs: ThinVec<Attribute>,
/// Can be `ForLoopDesugar` if the `let` statement is part of a `for` loop
/// desugaring. Otherwise will be `Normal`.
pub source: LocalSource,
}

/// Represents a single arm of a `match` expression.
/// Represents a single arm of a `match` expression, e.g.
/// `<pats> (if <guard>) => <body>`.
#[derive(Clone, RustcEncodable, RustcDecodable, Debug, HashStable)]
pub struct Arm {
pub attrs: HirVec<Attribute>,
/// Multiple patterns can be combined with `|`
pub pats: HirVec<P<Pat>>,
/// Optional guard clause.
pub guard: Option<Guard>,
/// The expression the arm evaluates to if this arm matches.
pub body: P<Expr>,
}

Expand Down