use middle::const_eval::{const_int_checked_rem, const_uint_checked_rem};
use middle::const_eval::{const_int_checked_shl, const_uint_checked_shl};
use middle::const_eval::{const_int_checked_shr, const_uint_checked_shr};
-use middle::const_eval::EvalHint::ExprTypeChecked;
-use middle::const_eval::eval_const_expr_partial;
use middle::def::Def;
use middle::def_id::DefId;
use trans::{adt, closure, debuginfo, expr, inline, machine};
}
}
-#[derive(Copy, Clone)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq)]
pub enum TrueConst {
Yes, No
}
},
hir::ExprIndex(ref base, ref index) => {
let (bv, bt) = try!(const_expr(cx, &base, param_substs, fn_args, trueconst));
- let iv = match eval_const_expr_partial(cx.tcx(), &index, ExprTypeChecked, None) {
- Ok(ConstVal::Int(i)) => i as u64,
- Ok(ConstVal::Uint(u)) => u,
- _ => cx.sess().span_bug(index.span,
- "index is not an integer-constant expression")
+ let iv = try!(const_expr(cx, &index, param_substs, fn_args, TrueConst::Yes)).0;
+ let iv = if let Some(iv) = const_to_opt_uint(iv) {
+ iv
+ } else {
+ cx.sess().span_bug(index.span, "index is not an integer-constant expression");
};
let (arr, len) = match bt.sty {
ty::TyArray(_, u) => (bv, C_uint(cx, u)),
--- /dev/null
+// Copyright 2016 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.
+
+const ARR: [usize; 5] = [5, 4, 3, 2, 1];
+
+fn main() {
+ assert_eq!(3, ARR[ARR[3]]);
+}
--- /dev/null
+// Copyright 2016 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.
+
+const ARR: [usize; 5] = [5, 4, 3, 2, 1];
+const BLA: usize = ARR[ARR[3]];
+
+fn main() {
+ assert_eq!(3, BLA);
+}
--- /dev/null
+// Copyright 2016 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.
+#![feature(const_indexing)]
+
+const ARR: [usize; 5] = [5, 4, 3, 2, 1];
+
+fn main() {
+ assert_eq!(3, ARR[ARR[3]]);
+}