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avoid converting types into themselves (clippy::useless_conversion) #82236

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merged 1 commit into from
Feb 18, 2021
Merged

avoid converting types into themselves (clippy::useless_conversion) #82236

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2 changes: 1 addition & 1 deletion compiler/rustc_parse/src/parser/expr.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -513,7 +513,7 @@ impl<'a> Parser<'a> {
token::Ident(..) if this.is_mistaken_not_ident_negation() => {
make_it!(this, attrs, |this, _| this.recover_not_expr(lo))
}
_ => return this.parse_dot_or_call_expr(Some(attrs.into())),
_ => return this.parse_dot_or_call_expr(Some(attrs)),
}
}

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6 changes: 3 additions & 3 deletions compiler/rustc_parse/src/parser/stmt.rs
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Expand Up @@ -97,7 +97,7 @@ impl<'a> Parser<'a> {
self.mk_stmt(lo, StmtKind::Empty)
} else if self.token != token::CloseDelim(token::Brace) {
// Remainder are line-expr stmts.
let e = self.parse_expr_res(Restrictions::STMT_EXPR, Some(attrs.into()))?;
let e = self.parse_expr_res(Restrictions::STMT_EXPR, Some(attrs))?;
self.mk_stmt(lo.to(e.span), StmtKind::Expr(e))
} else {
self.error_outer_attrs(&attrs.take_for_recovery());
Expand Down Expand Up @@ -131,7 +131,7 @@ impl<'a> Parser<'a> {
};

let expr = this.with_res(Restrictions::STMT_EXPR, |this| {
let expr = this.parse_dot_or_call_expr_with(expr, lo, attrs.into())?;
let expr = this.parse_dot_or_call_expr_with(expr, lo, attrs)?;
this.parse_assoc_expr_with(0, LhsExpr::AlreadyParsed(expr))
})?;
Ok((
Expand Down Expand Up @@ -213,7 +213,7 @@ impl<'a> Parser<'a> {
}

fn recover_local_after_let(&mut self, lo: Span, attrs: AttrVec) -> PResult<'a, Stmt> {
let local = self.parse_local(attrs.into())?;
let local = self.parse_local(attrs)?;
Ok(self.mk_stmt(lo.to(self.prev_token.span), StmtKind::Local(local)))
}

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1 change: 0 additions & 1 deletion compiler/rustc_typeck/src/astconv/mod.rs
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Expand Up @@ -1473,7 +1473,6 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
}),
assoc_name,
)
.into_iter()
},
|| param_name.to_string(),
assoc_name,
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2 changes: 1 addition & 1 deletion src/bootstrap/install.rs
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Expand Up @@ -53,7 +53,7 @@ fn install_sh(
}

fn default_path(config: &Option<PathBuf>, default: &str) -> PathBuf {
PathBuf::from(config.as_ref().cloned().unwrap_or_else(|| PathBuf::from(default)))
config.as_ref().cloned().unwrap_or_else(|| PathBuf::from(default))
}

fn prepare_dir(mut path: PathBuf) -> String {
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2 changes: 1 addition & 1 deletion src/librustdoc/core.rs
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Expand Up @@ -161,7 +161,7 @@ impl<'tcx> DocContext<'tcx> {
}
Entry::Occupied(e) => e.into_mut(),
};
*def_index = DefIndex::from(*def_index + 1);
*def_index = *def_index + 1;
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Does this compile?

Suggested change
*def_index = *def_index + 1;
*def_index += 1;

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nope :(

error[E0368]: binary assignment operation `+=` cannot be applied to type `DefIndex`
   --> src/librustdoc/core.rs:164:9
    |
164 |         *def_index += 1;
    |         ----------^^^^^
    |         |
    |         cannot use `+=` on type `DefIndex`

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@jyn514 jyn514 Feb 17, 2021 •
edited
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Now I'm confused, how does this code work at all? DefIndex implements neither Deref nor Add: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_hir/def_id/struct.DefIndex.html

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Could be related to the newtype_index!() macro that is used when the struct is declared
https://doc.rust-lang.org/nightly/nightly-rustc/src/rustc_span/def_id.rs.html#119
https://doc.rust-lang.org/nightly/nightly-rustc/rustc_index/macro.newtype_index.html

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Ah, ok. It would be nice to add AddAssign there. But no need to do it here.


DefId { krate: crate_num, index: *def_index }
}
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2 changes: 1 addition & 1 deletion src/librustdoc/json/conversions.rs
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Expand Up @@ -182,7 +182,7 @@ fn from_clean_item_kind(item: clean::ItemKind, tcx: TyCtxt<'_>) -> ItemEnum {
bounds: g.into_iter().map(Into::into).collect(),
default: t.map(Into::into),
},
StrippedItem(inner) => from_clean_item_kind(*inner, tcx).into(),
StrippedItem(inner) => from_clean_item_kind(*inner, tcx),
PrimitiveItem(_) | KeywordItem(_) => {
panic!("{:?} is not supported for JSON output", item)
}
Expand Down