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Implement (HashMap) Entry::insert as per #60142 #64656

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merged 1 commit into from
Oct 9, 2019
Merged

Implement (HashMap) Entry::insert as per #60142 #64656

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21 changes: 18 additions & 3 deletions Cargo.lock
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Original file line number Diff line number Diff line change
Expand Up @@ -107,6 +107,12 @@ dependencies = [
"winapi 0.3.6",
]

[[package]]
name = "autocfg"
version = "0.1.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b671c8fb71b457dd4ae18c4ba1e59aa81793daacc361d82fcd410cef0d491875"

[[package]]
name = "backtrace"
version = "0.3.37"
Expand Down Expand Up @@ -1259,7 +1265,7 @@ version = "2.0.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "df044dd42cdb7e32f28557b661406fc0f2494be75199779998810dbc35030e0d"
dependencies = [
"hashbrown",
"hashbrown 0.5.0",
"lazy_static 1.3.0",
"log",
"pest",
Expand All @@ -1276,10 +1282,19 @@ version = "0.5.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e1de41fb8dba9714efd92241565cdff73f78508c95697dd56787d3cba27e2353"
dependencies = [
"serde",
]

[[package]]
name = "hashbrown"
version = "0.6.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "6587d09be37fb98a11cb08b9000a3f592451c1b1b613ca69d949160e313a430a"
dependencies = [
"autocfg",
"compiler_builtins",
"rustc-std-workspace-alloc",
"rustc-std-workspace-core",
"serde",
]

[[package]]
Expand Down Expand Up @@ -4073,7 +4088,7 @@ dependencies = [
"core",
"dlmalloc",
"fortanix-sgx-abi",
"hashbrown",
"hashbrown 0.6.1",
"libc",
"panic_abort",
"panic_unwind",
Expand Down
2 changes: 1 addition & 1 deletion src/libstd/Cargo.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -23,7 +23,7 @@ libc = { version = "0.2.51", default-features = false, features = ['rustc-dep-of
compiler_builtins = { version = "0.1.16" }
profiler_builtins = { path = "../libprofiler_builtins", optional = true }
unwind = { path = "../libunwind" }
hashbrown = { version = "0.5.0", features = ['rustc-dep-of-std'] }
hashbrown = { version = "0.6.1", default-features = false, features = ['rustc-dep-of-std'] }

[dependencies.backtrace_rs]
package = "backtrace"
Expand Down
47 changes: 47 additions & 0 deletions src/libstd/collections/hash/map.rs
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Expand Up @@ -2030,6 +2030,31 @@ impl<'a, K, V> Entry<'a, K, V> {
Vacant(entry) => Vacant(entry),
}
}

/// Sets the value of the entry, and returns an OccupiedEntry.
///
/// # Examples
///
/// ```
/// #![feature(entry_insert)]
/// use std::collections::HashMap;
///
/// let mut map: HashMap<&str, String> = HashMap::new();
/// let entry = map.entry("poneyland").insert("hoho".to_string());
///
/// assert_eq!(entry.key(), &"poneyland");
/// ```
#[inline]
#[unstable(feature = "entry_insert", issue = "65225")]
pub fn insert(self, value: V) -> OccupiedEntry<'a, K, V> {
match self {
Occupied(mut entry) => {
entry.insert(value);
entry
},
Vacant(entry) => entry.insert_entry(value),
}
}
}

impl<'a, K, V: Default> Entry<'a, K, V> {
Expand Down Expand Up @@ -2347,6 +2372,28 @@ impl<'a, K: 'a, V: 'a> VacantEntry<'a, K, V> {
pub fn insert(self, value: V) -> &'a mut V {
self.base.insert(value)
}

/// Sets the value of the entry with the VacantEntry's key,
/// and returns an OccupiedEntry.
///
/// # Examples
///
/// ```
/// use std::collections::HashMap;
/// use std::collections::hash_map::Entry;
///
/// let mut map: HashMap<&str, u32> = HashMap::new();
///
/// if let Entry::Vacant(o) = map.entry("poneyland") {
/// o.insert(37);
/// }
/// assert_eq!(map["poneyland"], 37);
/// ```
#[inline]
fn insert_entry(self, value: V) -> OccupiedEntry<'a, K, V> {
let base = self.base.insert_entry(value);
OccupiedEntry { base }
}
}

#[stable(feature = "rust1", since = "1.0.0")]
Expand Down