Fix visibilities

.github/workflows/ci.yaml

@@ -24,6 +24,8 @@ jobs:
     runs-on: ${{ matrix.os }}
     env:
       CC: deny_c
+      # we want to build r-a on stable to check that it keeps building on stable,
+      # but we also want to test our proc-macro-srv which depends on nightly features
       RUSTC_BOOTSTRAP: 1
 
     strategy:

crates/proc-macro-srv/src/dylib.rs

@@ -13,8 +13,6 @@ use object::Object;
 use paths::AbsPath;
 use proc_macro_api::{read_dylib_info, ProcMacroKind};
 
-use crate::tt;
-
 const NEW_REGISTRAR_SYMBOL: &str = "_rustc_proc_macro_decls_";
 
 fn invalid_data_err(e: impl Into<Box<dyn std::error::Error + Send + Sync>>) -> io::Error {
@@ -152,9 +150,9 @@ impl Expander {
     pub fn expand(
         &self,
         macro_name: &str,
-        macro_body: &tt::Subtree,
-        attributes: Option<&tt::Subtree>,
-    ) -> Result<tt::Subtree, String> {
+        macro_body: &crate::tt::Subtree,
+        attributes: Option<&crate::tt::Subtree>,
+    ) -> Result<crate::tt::Subtree, String> {
         let result = self.inner.proc_macros.expand(macro_name, macro_body, attributes);
         result.map_err(|e| e.as_str().unwrap_or_else(|| "<unknown error>".to_string()))
     }

crates/proc-macro-srv/src/lib.rs

@@ -13,6 +13,7 @@
 #![cfg(feature = "sysroot-abi")]
 #![feature(proc_macro_internals, proc_macro_diagnostic, proc_macro_span)]
 #![warn(rust_2018_idioms, unused_lifetimes, semicolon_in_expressions_from_macros)]
+#![allow(unreachable_pub)]
 
 extern crate proc_macro;
 

crates/proc-macro-srv/src/proc_macros.rs

@@ -25,7 +25,7 @@ impl ProcMacros {
     /// *`info` - RustCInfo about the compiler that was used to compile the
     ///           macro crate. This is the information we use to figure out
     ///           which ABI to return
-    pub fn from_lib(
+    pub(crate) fn from_lib(
         lib: &Library,
         symbol_name: String,
         info: RustCInfo,
@@ -37,22 +37,10 @@ impl ProcMacros {
 
             return Ok(Self { exported_macros: macros.to_vec() });
         }
-
-        // if we reached this point, versions didn't match. in testing, we
-        // want that to panic - this could mean that the format of `rustc
-        // --version` no longer matches the format of the version string
-        // stored in the `.rustc` section, and we want to catch that in-tree
-        // with `x.py test`
-        if cfg!(test) {
-            panic!(
-                "sysroot ABI mismatch: dylib rustc version (read from .rustc section): {:?} != proc-macro-srv version (read from 'rustc --version'): {:?}",
-                info.version_string, crate::RUSTC_VERSION_STRING
-            );
-        }
         Err(LoadProcMacroDylibError::AbiMismatch(info.version_string))
     }
 
-    pub fn expand(
+    pub(crate) fn expand(
         &self,
         macro_name: &str,
         macro_body: &tt::Subtree,
@@ -107,7 +95,7 @@ impl ProcMacros {
         Err(proc_macro::bridge::PanicMessage::String("Nothing to expand".to_string()).into())
     }
 
-    pub fn list_macros(&self) -> Vec<(String, ProcMacroKind)> {
+    pub(crate) fn list_macros(&self) -> Vec<(String, ProcMacroKind)> {
         self.exported_macros
             .iter()
             .map(|proc_macro| match proc_macro {
@@ -129,5 +117,11 @@ impl ProcMacros {
 fn test_version_check() {
     let path = paths::AbsPathBuf::assert(crate::proc_macro_test_dylib_path());
     let info = proc_macro_api::read_dylib_info(&path).unwrap();
-    assert_eq!(info.version_string, crate::RUSTC_VERSION_STRING);
+    assert_eq!(
+        info.version_string,
+        crate::RUSTC_VERSION_STRING,
+        "sysroot ABI mismatch: dylib rustc version (read from .rustc section): {:?} != proc-macro-srv version (read from 'rustc --version'): {:?}",
+        info.version_string,
+        crate::RUSTC_VERSION_STRING,
+    );
 }

crates/proc-macro-srv/src/server.rs

@@ -14,7 +14,7 @@ use proc_macro::{
 };
 
 mod token_stream;
-pub use token_stream::TokenStream;
+pub(crate) use token_stream::TokenStream;
 use token_stream::TokenStreamBuilder;
 
 mod symbol;

crates/proc-macro-srv/src/server/symbol.rs

@@ -12,11 +12,11 @@ thread_local! {
 pub struct Symbol(u32);
 
 impl Symbol {
-    pub fn intern(data: &str) -> Symbol {
+    pub(super) fn intern(data: &str) -> Symbol {
         SYMBOL_INTERNER.with(|i| i.borrow_mut().intern(data))
     }
 
-    pub fn text(&self) -> SmolStr {
+    pub(super) fn text(&self) -> SmolStr {
         SYMBOL_INTERNER.with(|i| i.borrow().get(self).clone())
     }
 }

crates/proc-macro-srv/src/server/token_stream.rs

@@ -4,15 +4,15 @@ use crate::tt::{self, TokenTree};
 
 #[derive(Debug, Default, Clone)]
 pub struct TokenStream {
-    pub token_trees: Vec<TokenTree>,
+    pub(super) token_trees: Vec<TokenTree>,
 }
 
 impl TokenStream {
-    pub fn new() -> Self {
+    pub(crate) fn new() -> Self {
         TokenStream::default()
     }
 
-    pub fn with_subtree(subtree: tt::Subtree) -> Self {
+    pub(crate) fn with_subtree(subtree: tt::Subtree) -> Self {
         if subtree.delimiter.kind != tt::DelimiterKind::Invisible {
             TokenStream { token_trees: vec![TokenTree::Subtree(subtree)] }
         } else {
@@ -20,11 +20,11 @@ impl TokenStream {
         }
     }
 
-    pub fn into_subtree(self) -> tt::Subtree {
+    pub(crate) fn into_subtree(self) -> tt::Subtree {
         tt::Subtree { delimiter: tt::Delimiter::UNSPECIFIED, token_trees: self.token_trees }
     }
 
-    pub fn is_empty(&self) -> bool {
+    pub(super) fn is_empty(&self) -> bool {
         self.token_trees.is_empty()
     }
 }
@@ -78,12 +78,12 @@ impl Extend<TokenStream> for TokenStream {
     }
 }
 
-pub struct TokenStreamBuilder {
+pub(super) struct TokenStreamBuilder {
     acc: TokenStream,
 }
 
-/// Public implementation details for the `TokenStream` type, such as iterators.
-pub mod token_stream {
+/// pub(super)lic implementation details for the `TokenStream` type, such as iterators.
+pub(super) mod token_stream {
     use std::str::FromStr;
 
     use super::{tt, TokenStream, TokenTree};