bjoernager/rust
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dont call type ascription 'cast'

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This commit is contained in:
Michael Goulet 2022-07-29 07:01:58 +00:00
parent 9de7474830
commit 7cdd937bb8
9 changed files with 80 additions and 79 deletions
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13
compiler/rustc_parse/src/parser/expr.rs
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@ -827,11 +827,12 @@ impl<'a> Parser<'a> {
cast_expr: P<Expr>,
) -> PResult<'a, P<Expr>> {
let span = cast_expr.span;
let maybe_ascription_span = if let ExprKind::Type(ascripted_expr, _) = &cast_expr.kind {
Some(ascripted_expr.span.shrink_to_hi().with_hi(span.hi()))
} else {
None
};
let (cast_kind, maybe_ascription_span) =
if let ExprKind::Type(ascripted_expr, _) = &cast_expr.kind {
("type ascription", Some(ascripted_expr.span.shrink_to_hi().with_hi(span.hi())))
} else {
("cast", None)
};
// Save the memory location of expr before parsing any following postfix operators.
// This will be compared with the memory location of the output expression.
@ -844,7 +845,7 @@ impl<'a> Parser<'a> {
// If the resulting expression is not a cast, or has a different memory location, it is an illegal postfix operator.
if !matches!(with_postfix.kind, ExprKind::Cast(_, _) | ExprKind::Type(_, _)) || changed {
let msg = format!(
"casts cannot be followed by {}",
"{cast_kind} cannot be followed by {}",
match with_postfix.kind {
ExprKind::Index(_, _) => "indexing",
ExprKind::Try(_) => "`?`",