Auto merge of #74175 - nnethercote:more-static-symbols, r=oli-obk

More static symbols

These commits add some more static symbols and convert lots of places to use them.

r? @oli-obk

Author: bors

src/librustc_ast/expand/allocator.rs

@@ -9,7 +9,7 @@ pub enum AllocatorKind {
 }
 
 impl AllocatorKind {
-    pub fn fn_name(&self, base: &str) -> String {
+    pub fn fn_name(&self, base: Symbol) -> String {
         match *self {
             AllocatorKind::Global => format!("__rg_{}", base),
             AllocatorKind::Default => format!("__rdl_{}", base),
@@ -26,29 +26,29 @@ pub enum AllocatorTy {
 }
 
 pub struct AllocatorMethod {
-    pub name: &'static str,
+    pub name: Symbol,
     pub inputs: &'static [AllocatorTy],
     pub output: AllocatorTy,
 }
 
 pub static ALLOCATOR_METHODS: &[AllocatorMethod] = &[
     AllocatorMethod {
-        name: "alloc",
+        name: sym::alloc,
         inputs: &[AllocatorTy::Layout],
         output: AllocatorTy::ResultPtr,
     },
     AllocatorMethod {
-        name: "dealloc",
+        name: sym::dealloc,
         inputs: &[AllocatorTy::Ptr, AllocatorTy::Layout],
         output: AllocatorTy::Unit,
     },
     AllocatorMethod {
-        name: "realloc",
+        name: sym::realloc,
         inputs: &[AllocatorTy::Ptr, AllocatorTy::Layout, AllocatorTy::Usize],
         output: AllocatorTy::ResultPtr,
     },
     AllocatorMethod {
-        name: "alloc_zeroed",
+        name: sym::alloc_zeroed,
         inputs: &[AllocatorTy::Layout],
         output: AllocatorTy::ResultPtr,
     },
@@ -70,7 +70,7 @@ pub fn global_allocator_spans(krate: &ast::Crate) -> Vec<Span> {
         }
     }
 
-    let name = Symbol::intern(&AllocatorKind::Global.fn_name("alloc"));
+    let name = Symbol::intern(&AllocatorKind::Global.fn_name(sym::alloc));
     let mut f = Finder { name, spans: Vec::new() };
     visit::walk_crate(&mut f, krate);
     f.spans

src/librustc_ast/util/comments.rs

@@ -2,7 +2,7 @@ pub use CommentStyle::*;
 
 use crate::ast;
 use rustc_span::source_map::SourceMap;
-use rustc_span::{BytePos, CharPos, FileName, Pos};
+use rustc_span::{BytePos, CharPos, FileName, Pos, Symbol};
 
 use log::debug;
 
@@ -52,7 +52,8 @@ pub fn is_doc_comment(s: &str) -> bool {
         || s.starts_with("/*!")
 }
 
-pub fn doc_comment_style(comment: &str) -> ast::AttrStyle {
+pub fn doc_comment_style(comment: Symbol) -> ast::AttrStyle {
+    let comment = &comment.as_str();
     assert!(is_doc_comment(comment));
     if comment.starts_with("//!") || comment.starts_with("/*!") {
         ast::AttrStyle::Inner
@@ -61,7 +62,9 @@ pub fn doc_comment_style(comment: &str) -> ast::AttrStyle {
     }
 }
 
-pub fn strip_doc_comment_decoration(comment: &str) -> String {
+pub fn strip_doc_comment_decoration(comment: Symbol) -> String {
+    let comment = &comment.as_str();
+
     /// remove whitespace-only lines from the start/end of lines
     fn vertical_trim(lines: Vec<String>) -> Vec<String> {
         let mut i = 0;