bjoernager/rust
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interpret: use Either over Result when it is not representing an error condition

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This commit is contained in:
Ralf Jung 2022-11-18 10:18:32 +01:00
parent 83356b78c4
commit 4101889786
17 changed files with 130 additions and 98 deletions
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28
compiler/rustc_mir_build/src/thir/pattern/deconstruct_pat.rs
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@ -42,16 +42,17 @@
//! wildcards, see [`SplitWildcard`]; for integer ranges, see [`SplitIntRange`]; for slices, see
//! [`SplitVarLenSlice`].
use self::Constructor::*;
use self::SliceKind::*;
use std::cell::Cell;
use std::cmp::{self, max, min, Ordering};
use std::fmt;
use std::iter::{once, IntoIterator};
use std::ops::RangeInclusive;
use super::compare_const_vals;
use super::usefulness::{MatchCheckCtxt, PatCtxt};
use smallvec::{smallvec, SmallVec};
use rustc_data_structures::captures::Captures;
use rustc_index::vec::Idx;
use rustc_hir::{HirId, RangeEnd};
use rustc_index::vec::Idx;
use rustc_middle::mir::{self, Field};
use rustc_middle::thir::{FieldPat, Pat, PatKind, PatRange};
use rustc_middle::ty::layout::IntegerExt;
@ -61,12 +62,11 @@ use rustc_session::lint;
use rustc_span::{Span, DUMMY_SP};
use rustc_target::abi::{Integer, Size, VariantIdx};
use smallvec::{smallvec, SmallVec};
use std::cell::Cell;
use std::cmp::{self, max, min, Ordering};
use std::fmt;
use std::iter::{once, IntoIterator};
use std::ops::RangeInclusive;
use self::Constructor::*;
use self::SliceKind::*;
use super::compare_const_vals;
use super::usefulness::{MatchCheckCtxt, PatCtxt};
/// Recursively expand this pattern into its subpatterns. Only useful for or-patterns.
fn expand_or_pat<'p, 'tcx>(pat: &'p Pat<'tcx>) -> Vec<&'p Pat<'tcx>> {
@ -147,7 +147,9 @@ impl IntRange {
// straight to the result, after doing a bit of checking. (We
// could remove this branch and just fall through, which
// is more general but much slower.)
if let Ok(Ok(bits)) = scalar.to_bits_or_ptr_internal(target_size) {
if let either::Left(bits) =
scalar.to_bits_or_ptr_internal(target_size).unwrap()
{
return Some(bits);
} else {
return None;