squiid/rust
1
0
Fork 0
Code Issues Pull requests Projects Activity

reduced a code repetition related to bit operation.

Browse source
This commit is contained in:
kenta7777 2019-03-15 21:48:05 +09:00
parent 70d1150478
commit 12e3e8412c
1 changed files with 3 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
src/librustc_mir/hair/pattern/_match.rs
View file

@ -172,7 +172,7 @@ use rustc::ty::{self, subst::SubstsRef, Ty, TyCtxt, TypeFoldable, Const};
use rustc::ty::layout::{Integer, IntegerExt, VariantIdx, Size};
use rustc::mir::Field;
use rustc::mir::interpret::{ConstValue, Scalar};
use rustc::mir::interpret::{ConstValue, Scalar, truncate};
use rustc::util::common::ErrorReported;
use syntax::attr::{SignedInt, UnsignedInt};
@ -685,9 +685,8 @@ fn all_constructors<'a, 'tcx: 'a>(cx: &mut MatchCheckCtxt<'a, 'tcx>,
vec![ConstantRange(min, max, pcx.ty, RangeEnd::Included)]
}
ty::Uint(uty) => {
// FIXME(49937): refactor these bit manipulations into interpret.
let bits = Integer::from_attr(&cx.tcx, UnsignedInt(uty)).size().bits() as u128;
let max = !0u128 >> (128 - bits);
let size = Integer::from_attr(&cx.tcx, UnsignedInt(uty)).size();
let max = truncate(u128::max_value(), size);
vec![ConstantRange(0, max, pcx.ty, RangeEnd::Included)]
}
_ => {