use syntax::ast;
use syntax::ptr::P;
-use syntax_pos::{Span, DUMMY_SP};
+use syntax_pos::{Span, DUMMY_SP, MultiSpan};
struct OuterVisitor<'a, 'tcx: 'a> { tcx: TyCtxt<'a, 'tcx, 'tcx> }
}
})
}
-
- let check_move = |p: &Pat, sub: Option<&Pat>| {
+ let span_vec = &mut Vec::new();
+ let check_move = |p: &Pat, sub: Option<&Pat>, span_vec: &mut Vec<Span>| {
// check legality of moving out of the enum
// x @ Foo(..) is legal, but x @ Foo(y) isn't.
crate attributes to enable");
}
err.emit();
- } else if let Some(by_ref_span) = by_ref_span {
- struct_span_err!(
- cx.tcx.sess,
- p.span,
- E0009,
- "cannot bind by-move and by-ref in the same pattern",
- )
- .span_label(p.span, "by-move pattern here")
- .span_label(by_ref_span, "both by-ref and by-move used")
- .emit();
+ } else if let Some(_by_ref_span) = by_ref_span {
+ span_vec.push(p.span);
}
};
ty::BindByValue(..) => {
let pat_ty = cx.tables.node_id_to_type(p.hir_id);
if pat_ty.moves_by_default(cx.tcx, cx.param_env, pat.span) {
- check_move(p, sub.as_ref().map(|p| &**p));
+ check_move(p, sub.as_ref().map(|p| &**p), span_vec);
}
}
_ => {}
true
});
}
+ if !span_vec.is_empty(){
+ let span = MultiSpan::from_spans(span_vec.clone());
+ let mut err = struct_span_err!(
+ cx.tcx.sess,
+ span,
+ E0009,
+ "cannot bind by-move and by-ref in the same pattern",
+ );
+ err.span_label(by_ref_span.unwrap(), "both by-ref and by-move used");
+ for span in span_vec.iter(){
+ err.span_label(*span, "by-move pattern here");
+ }
+ err.emit();
+ }
}
/// Ensures that a pattern guard doesn't borrow by mutable reference or
--- /dev/null
+// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+enum E {
+ Foo(String, String, String),
+}
+
+struct Bar {
+ a: String,
+ b: String,
+}
+
+fn main() {
+ let bar = Bar { a: "1".to_string(), b: "2".to_string() };
+ match E::Foo("".into(), "".into(), "".into()) {
+ E::Foo(a, b, ref c) => {}
+ }
+ match bar {
+ Bar {a, ref b} => {}
+ }
+}
--- /dev/null
+error[E0009]: cannot bind by-move and by-ref in the same pattern
+ --> $DIR/issue-53840.rs:22:16
+ |
+LL | E::Foo(a, b, ref c) => {}
+ | ^ ^ ----- both by-ref and by-move used
+ | | |
+ | | by-move pattern here
+ | by-move pattern here
+
+error[E0009]: cannot bind by-move and by-ref in the same pattern
+ --> $DIR/issue-53840.rs:25:14
+ |
+LL | Bar {a, ref b} => {}
+ | ^ ----- both by-ref and by-move used
+ | |
+ | by-move pattern here
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0009`.