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Use vec![x; n] instead of iter::repeat(x).take(n).collect()

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This commit is contained in:
ljedrz 2018-10-30 14:37:26 +01:00
parent b1ca3907e0
commit d1e74a3356
2 changed files with 3 additions and 9 deletions
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6
src/librustc/mir/interpret/mod.rs
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@ -295,12 +295,10 @@ impl AllocDecodingState {
} }
pub fn new(data_offsets: Vec<u32>) -> AllocDecodingState { pub fn new(data_offsets: Vec<u32>) -> AllocDecodingState {
let decoding_state: Vec<_> = ::std::iter::repeat(Mutex::new(State::Empty)) let decoding_state = vec![Mutex::new(State::Empty); data_offsets.len()];
.take(data_offsets.len())
.collect();
AllocDecodingState { AllocDecodingState {
decoding_state: decoding_state, decoding_state,
data_offsets, data_offsets,
} }
} }

6
src/librustc/traits/error_reporting.rs
View File

@ -34,7 +34,6 @@ use hir::def_id::DefId;
use infer::{self, InferCtxt}; use infer::{self, InferCtxt};
use infer::type_variable::TypeVariableOrigin; use infer::type_variable::TypeVariableOrigin;
use std::fmt; use std::fmt;
use std::iter;
use syntax::ast; use syntax::ast;
use session::DiagnosticMessageId; use session::DiagnosticMessageId;
use ty::{self, AdtKind, ToPredicate, ToPolyTraitRef, Ty, TyCtxt, TypeFoldable}; use ty::{self, AdtKind, ToPredicate, ToPolyTraitRef, Ty, TyCtxt, TypeFoldable};
@ -1095,10 +1094,7 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
// found arguments is empty (assume the user just wants to ignore args in this case). // found arguments is empty (assume the user just wants to ignore args in this case).
// For example, if `expected_args_length` is 2, suggest `|_, _|`. // For example, if `expected_args_length` is 2, suggest `|_, _|`.
if found_args.is_empty() && is_closure { if found_args.is_empty() && is_closure {
let underscores = iter::repeat("_") let underscores = vec!["_"; expected_args.len()].join(", ");
.take(expected_args.len())
.collect::<Vec<_>>()
.join(", ");
err.span_suggestion_with_applicability( err.span_suggestion_with_applicability(
found_span, found_span,
&format!( &format!(