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Auto merge of #91626 - klensy:json-less-alloc, r=petrochenkov

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rustc_serialize: don't allocate `String`s as key for `BTreeMap`, when `str` is enough
This commit is contained in:
bors 2021-12-13 07:30:38 +00:00
commit 6d6d0899c8
1 changed files with 3 additions and 3 deletions
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6
compiler/rustc_serialize/src/json.rs
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@ -2320,12 +2320,12 @@ impl crate::Decoder for Decoder {
let name = match self.pop() {
Json::String(s) => s,
Json::Object(mut o) => {
let n = match o.remove(&"variant".to_owned()) {
let n = match o.remove("variant") {
Some(Json::String(s)) => s,
Some(val) => return Err(ExpectedError("String".to_owned(), val.to_string())),
None => return Err(MissingFieldError("variant".to_owned())),
};
match o.remove(&"fields".to_string()) {
match o.remove("fields") {
Some(Json::Array(l)) => {
self.stack.extend(l.into_iter().rev());
}
@ -2365,7 +2365,7 @@ impl crate::Decoder for Decoder {
{
let mut obj = expect!(self.pop(), Object)?;
let value = match obj.remove(&name.to_string()) {
let value = match obj.remove(name) {
None => {
// Add a Null and try to parse it as an Option<_>
// to get None as a default value.