bjoernager/rust
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Syntatically accept become expressions

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This commit is contained in:
Maybe Waffle 2022-11-16 18:36:17 +00:00
parent 8d1fa473dd
commit d7713feb99
14 changed files with 71 additions and 2 deletions
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6
compiler/rustc_ast/src/ast.rs
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@ -1295,6 +1295,7 @@ impl Expr {
ExprKind::Yield(..) => ExprPrecedence::Yield,
ExprKind::Yeet(..) => ExprPrecedence::Yeet,
ExprKind::FormatArgs(..) => ExprPrecedence::FormatArgs,
ExprKind::Become(..) => ExprPrecedence::Become,
ExprKind::Err => ExprPrecedence::Err,
}
}
@ -1515,6 +1516,11 @@ pub enum ExprKind {
/// with an optional value to be returned.
Yeet(Option<P<Expr>>),
/// A tail call return, with the value to be returned.
///
/// While `.0` must be a function call, we check this later, after parsing.
Become(P<Expr>),
/// Bytes included via `include_bytes!`
/// Added for optimization purposes to avoid the need to escape
/// large binary blobs - should always behave like [`ExprKind::Lit`]