Don't use the word "parse" for lexing operations.

Lexing converts source text into a token stream. Parsing converts a
token stream into AST fragments. This commit renames several lexing
operations that have "parse" in the name. I think these names have been
subtly confusing me for years.

This is just a `s/parse/lex/` on function names, with one exception:
`parse_stream_from_source_str` becomes `source_str_to_stream`, to make
it consistent with the existing `source_file_to_stream`. The commit also
moves that function's location in the file to be just above
`source_file_to_stream`.

The commit also cleans up a few comments along the way.

1 files changed, 2 insertions, 2 deletions

diff --git a/compiler/rustc_expand/src/proc_macro_server.rs b/compiler/rustc_expand/src/proc_macro_server.rs
index c2e799abae8..3b167c42e57 100644
--- a/compiler/rustc_expand/src/proc_macro_server.rs
+++ b/compiler/rustc_expand/src/proc_macro_server.rs
@@ -13,7 +13,7 @@ use rustc_data_structures::fx::FxHashMap;
 use rustc_data_structures::sync::Lrc;
 use rustc_errors::{Diag, ErrorGuaranteed, MultiSpan, PResult};
 use rustc_parse::lexer::nfc_normalize;
-use rustc_parse::parse_stream_from_source_str;
+use rustc_parse::source_str_to_stream;
 use rustc_session::parse::ParseSess;
 use rustc_span::def_id::CrateNum;
 use rustc_span::symbol::{self, sym, Symbol};
@@ -538,7 +538,7 @@ impl server::TokenStream for Rustc<'_, '_> {
     }
 
     fn from_str(&mut self, src: &str) -> Self::TokenStream {
-        parse_stream_from_source_str(
+        source_str_to_stream(
             FileName::proc_macro_source_code(src),
             src.to_string(),
             self.psess(),