ShiftRightWithOverflow,
MissingStructField,
NonConstPath,
+ UnresolvedPath,
ExpectedConstTuple,
ExpectedConstStruct,
TupleIndexOutOfBounds,
ShiftLeftWithOverflow => "attempted left shift with overflow".into_cow(),
ShiftRightWithOverflow => "attempted right shift with overflow".into_cow(),
MissingStructField => "nonexistent struct field".into_cow(),
- NonConstPath => "non-constant path in constant expr".into_cow(),
+ NonConstPath => "non-constant path in constant expression".into_cow(),
+ UnresolvedPath => "unresolved path in constant expression".into_cow(),
ExpectedConstTuple => "expected constant tuple".into_cow(),
ExpectedConstStruct => "expected constant struct".into_cow(),
TupleIndexOutOfBounds => "tuple index out of bounds".into_cow(),
}
}
hir::ExprPath(..) => {
- let opt_def = tcx.def_map.borrow().get(&e.id).map(|d| d.full_def());
+ let opt_def = if let Some(def) = tcx.def_map.borrow().get(&e.id) {
+ // After type-checking, def_map contains definition of the
+ // item referred to by the path. During type-checking, it
+ // can contain the raw output of path resolution, which
+ // might be a partially resolved path.
+ // FIXME: There's probably a better way to make sure we don't
+ // panic here.
+ if def.depth != 0 {
+ signal!(e, UnresolvedPath);
+ }
+ Some(def.full_def())
+ } else {
+ None
+ };
let (const_expr, const_ty) = match opt_def {
Some(def::DefConst(def_id)) => {
if def_id.is_local() {
--- /dev/null
+// Copyright 2015 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.
+
+fn main() {
+ fn f(a: [u8; u32::DOESNOTEXIST]) {}
+ //~^ ERROR unresolved path in constant expression
+}