bendns' repos / rust-analyzer
Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'crates/proc-macro-srv/src/abis/abi_sysroot/ra_server/symbol.rs')
-rw-r--r--crates/proc-macro-srv/src/abis/abi_sysroot/ra_server/symbol.rs34
1 files changed, 34 insertions, 0 deletions
diff --git a/crates/proc-macro-srv/src/abis/abi_sysroot/ra_server/symbol.rs b/crates/proc-macro-srv/src/abis/abi_sysroot/ra_server/symbol.rs
new file mode 100644
index 0000000000..b97e2aecf3
--- /dev/null
+++ b/crates/proc-macro-srv/src/abis/abi_sysroot/ra_server/symbol.rs
@@ -0,0 +1,34 @@
+use std::collections::HashMap;
+use tt::SmolStr;
+
+// Identifier for an interned symbol.
+#[derive(Hash, Eq, PartialEq, Copy, Clone)]
+pub struct Symbol(u32);
+
+#[derive(Default)]
+struct IdentInterner {
+ idents: HashMap<SmolStr, u32>,
+ ident_data: Vec<SmolStr>,
+}
+
+impl IdentInterner {
+ fn intern(&mut self, data: &str) -> Symbol {
+ if let Some(index) = self.idents.get(data) {
+ return *index;
+ }
+
+ let index = self.idents.len() as u32;
+ self.ident_data.push(data.clone());
+ self.idents.insert(data.clone(), index);
+ index
+ }
+
+ fn get(&self, index: u32) -> &SmolStr {
+ &self.ident_data[index as usize]
+ }
+
+ #[allow(unused)]
+ fn get_mut(&mut self, index: u32) -> &mut SmolStr {
+ self.ident_data.get_mut(index as usize).expect("Should be consistent")
+ }
+}