Auto merge of #17604 - Veykril:tt-symbols, r=Veykril

More symbol usage

crates/base-db/Cargo.toml

@@ -27,6 +27,7 @@ stdx.workspace = true
 syntax.workspace = true
 vfs.workspace = true
 span.workspace = true
+intern.workspace = true
 
 [lints]
 workspace = true

crates/base-db/src/input.rs

@@ -9,10 +9,10 @@
 use std::{fmt, mem, ops};
 
 use cfg::CfgOptions;
+use intern::Symbol;
 use la_arena::{Arena, Idx, RawIdx};
 use rustc_hash::{FxHashMap, FxHashSet};
 use span::Edition;
-use syntax::SmolStr;
 use triomphe::Arc;
 use vfs::{file_set::FileSet, AbsPathBuf, AnchoredPath, FileId, VfsPath};
 
@@ -99,8 +99,8 @@ impl fmt::Debug for CrateGraph {
 
 pub type CrateId = Idx<CrateData>;
 
-#[derive(Debug, Clone, PartialEq, Eq, Hash, PartialOrd, Ord)]
-pub struct CrateName(SmolStr);
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct CrateName(Symbol);
 
 impl CrateName {
     /// Creates a crate name, checking for dashes in the string provided.
@@ -110,16 +110,16 @@ impl CrateName {
         if name.contains('-') {
             Err(name)
         } else {
-            Ok(Self(SmolStr::new(name)))
+            Ok(Self(Symbol::intern(name)))
         }
     }
 
     /// Creates a crate name, unconditionally replacing the dashes with underscores.
     pub fn normalize_dashes(name: &str) -> CrateName {
-        Self(SmolStr::new(name.replace('-', "_")))
+        Self(Symbol::intern(&name.replace('-', "_")))
     }
 
-    pub fn as_smol_str(&self) -> &SmolStr {
+    pub fn symbol(&self) -> &Symbol {
         &self.0
     }
 }
@@ -133,19 +133,19 @@ impl fmt::Display for CrateName {
 impl ops::Deref for CrateName {
     type Target = str;
     fn deref(&self) -> &str {
-        &self.0
+        self.0.as_str()
     }
 }
 
 /// Origin of the crates.
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub enum CrateOrigin {
     /// Crates that are from the rustc workspace.
-    Rustc { name: String },
+    Rustc { name: Symbol },
     /// Crates that are workspace members.
-    Local { repo: Option<String>, name: Option<String> },
+    Local { repo: Option<String>, name: Option<Symbol> },
     /// Crates that are non member libraries.
-    Library { repo: Option<String>, name: String },
+    Library { repo: Option<String>, name: Symbol },
     /// Crates that are provided by the language, like std, core, proc-macro, ...
     Lang(LangCrateOrigin),
 }
@@ -201,16 +201,16 @@ impl fmt::Display for LangCrateOrigin {
     }
 }
 
-#[derive(Debug, Clone, PartialEq, Eq, Hash, PartialOrd, Ord)]
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub struct CrateDisplayName {
     // The name we use to display various paths (with `_`).
     crate_name: CrateName,
     // The name as specified in Cargo.toml (with `-`).
-    canonical_name: String,
+    canonical_name: Symbol,
 }
 
 impl CrateDisplayName {
-    pub fn canonical_name(&self) -> &str {
+    pub fn canonical_name(&self) -> &Symbol {
         &self.canonical_name
     }
     pub fn crate_name(&self) -> &CrateName {
@@ -220,7 +220,7 @@ impl CrateDisplayName {
 
 impl From<CrateName> for CrateDisplayName {
     fn from(crate_name: CrateName) -> CrateDisplayName {
-        let canonical_name = crate_name.to_string();
+        let canonical_name = crate_name.0.clone();
         CrateDisplayName { crate_name, canonical_name }
     }
 }
@@ -239,9 +239,9 @@ impl ops::Deref for CrateDisplayName {
 }
 
 impl CrateDisplayName {
-    pub fn from_canonical_name(canonical_name: String) -> CrateDisplayName {
-        let crate_name = CrateName::normalize_dashes(&canonical_name);
-        CrateDisplayName { crate_name, canonical_name }
+    pub fn from_canonical_name(canonical_name: &str) -> CrateDisplayName {
+        let crate_name = CrateName::normalize_dashes(canonical_name);
+        CrateDisplayName { crate_name, canonical_name: Symbol::intern(canonical_name) }
     }
 }