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or-patterns: syntax: simplify Arm.pats and ExprKind::Let.0.

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This commit is contained in:
Mazdak Farrokhzad 2019-08-28 00:57:15 +02:00
parent dbe6873387
commit ca968a10d8
1 changed files with 3 additions and 3 deletions
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6
src/libsyntax/ast.rs
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@ -930,7 +930,7 @@ pub struct Local {
#[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
pub struct Arm {
pub attrs: Vec<Attribute>,
pub pats: Vec<P<Pat>>,
pub pat: P<Pat>,
pub guard: Option<P<Expr>>,
pub body: P<Expr>,
pub span: Span,
@ -1148,12 +1148,12 @@ pub enum ExprKind {
Cast(P<Expr>, P<Ty>),
/// A type ascription (e.g., `42: usize`).
Type(P<Expr>, P<Ty>),
/// A `let pats = expr` expression that is only semantically allowed in the condition
/// A `let pat = expr` expression that is only semantically allowed in the condition
/// of `if` / `while` expressions. (e.g., `if let 0 = x { .. }`).
///
/// The `Vec<P<Pat>>` is for or-patterns at the top level.
/// FIXME(54883): Change this to just `P<Pat>`.
Let(Vec<P<Pat>>, P<Expr>),
Let(P<Pat>, P<Expr>),
/// An `if` block, with an optional `else` block.
///
/// `if expr { block } else { expr }`