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let_chains: Improve documentation for ast::ExprKind::Let(..).

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This commit is contained in:
Mazdak Farrokhzad 2019-05-18 00:27:12 +02:00
parent 86250a666e
commit 8b72e4c815
1 changed files with 4 additions and 1 deletions
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5
src/libsyntax/ast.rs
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@ -1115,8 +1115,11 @@ pub enum ExprKind {
Cast(P<Expr>, P<Ty>), Cast(P<Expr>, P<Ty>),
/// A type ascription (e.g., `42: usize`). /// A type ascription (e.g., `42: usize`).
Type(P<Expr>, P<Ty>), Type(P<Expr>, P<Ty>),
/// A `let pat = expr` pseudo-expression that only occurs in the scrutinee /// A `let pats = expr` pseudo-expression that only occurs in the scrutinee
/// of `if` / `while` expressions. (e.g., `if let 0 = x { .. }`). /// 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(Vec<P<Pat>>, P<Expr>),
/// An `if` block, with an optional `else` block. /// An `if` block, with an optional `else` block.
/// ///