Rollup merge of rust-lang#77780 - calebcartwright:cast-expr-attr-span, r=oli-obk

rustc_parse: fix spans on cast and range exprs with attrs

Currently the span for cast and range expressions does not include the span of attributes associated to the lhs which is causing some issues for us in rustfmt.

```rust
fn foo() -> i64 {
    #[attr]
    1u64 as i64
}

fn bar() -> Range<i32> {
    #[attr]
    1..2
}
```

This corrects the span for cast and range expressions to fully include the span of child nodes

Author: Dylan-DPC

compiler/rustc_parse/src/parser/expr.rs

@@ -246,11 +246,7 @@ impl<'a> Parser<'a> {
                 this.parse_assoc_expr_with(prec + prec_adjustment, LhsExpr::NotYetParsed)
             })?;
 
-            // Make sure that the span of the parent node is larger than the span of lhs and rhs,
-            // including the attributes.
-            let lhs_span =
-                lhs.attrs.iter().find(|a| a.style == AttrStyle::Outer).map_or(lhs_span, |a| a.span);
-            let span = lhs_span.to(rhs.span);
+            let span = self.mk_expr_sp(&lhs, lhs_span, rhs.span);
             lhs = match op {
                 AssocOp::Add
                 | AssocOp::Subtract
@@ -411,7 +407,7 @@ impl<'a> Parser<'a> {
             None
         };
         let rhs_span = rhs.as_ref().map_or(cur_op_span, |x| x.span);
-        let span = lhs.span.to(rhs_span);
+        let span = self.mk_expr_sp(&lhs, lhs.span, rhs_span);
         let limits =
             if op == AssocOp::DotDot { RangeLimits::HalfOpen } else { RangeLimits::Closed };
         Ok(self.mk_expr(span, self.mk_range(Some(lhs), rhs, limits)?, AttrVec::new()))
@@ -571,7 +567,11 @@ impl<'a> Parser<'a> {
         expr_kind: fn(P<Expr>, P<Ty>) -> ExprKind,
     ) -> PResult<'a, P<Expr>> {
         let mk_expr = |this: &mut Self, rhs: P<Ty>| {
-            this.mk_expr(lhs_span.to(rhs.span), expr_kind(lhs, rhs), AttrVec::new())
+            this.mk_expr(
+                this.mk_expr_sp(&lhs, lhs_span, rhs.span),
+                expr_kind(lhs, rhs),
+                AttrVec::new(),
+            )
         };
 
         // Save the state of the parser before parsing type normally, in case there is a
@@ -2324,4 +2324,14 @@ impl<'a> Parser<'a> {
     pub(super) fn mk_expr_err(&self, span: Span) -> P<Expr> {
         self.mk_expr(span, ExprKind::Err, AttrVec::new())
     }
+
+    /// Create expression span ensuring the span of the parent node
+    /// is larger than the span of lhs and rhs, including the attributes.
+    fn mk_expr_sp(&self, lhs: &P<Expr>, lhs_span: Span, rhs_span: Span) -> Span {
+        lhs.attrs
+            .iter()
+            .find(|a| a.style == AttrStyle::Outer)
+            .map_or(lhs_span, |a| a.span)
+            .to(rhs_span)
+    }
 }