hygiene: Tweak naming some more

src/librustc/ich/hcx.rs

@@ -363,17 +363,17 @@ impl<'a> HashStable<StableHashingContext<'a>> for Span {
             }
 
             let sub_hash: u64 = CACHE.with(|cache| {
-                let mark = span.ctxt.outer();
+                let expn_id = span.ctxt.outer_expn();
 
-                if let Some(&sub_hash) = cache.borrow().get(&mark) {
+                if let Some(&sub_hash) = cache.borrow().get(&expn_id) {
                     return sub_hash;
                 }
 
                 let mut hasher = StableHasher::new();
-                mark.expn_info().hash_stable(hcx, &mut hasher);
+                expn_id.expn_info().hash_stable(hcx, &mut hasher);
                 let sub_hash: Fingerprint = hasher.finish();
                 let sub_hash = sub_hash.to_smaller_hash();
-                cache.borrow_mut().insert(mark, sub_hash);
+                cache.borrow_mut().insert(expn_id, sub_hash);
                 sub_hash
             });
 

src/librustc/ty/query/on_disk_cache.rs

@@ -819,15 +819,15 @@ where
         if span_data.ctxt == SyntaxContext::empty() {
             TAG_NO_EXPANSION_INFO.encode(self)
         } else {
-            let (mark, expn_info) = span_data.ctxt.outer_and_expn_info();
+            let (expn_id, expn_info) = span_data.ctxt.outer_expn_with_info();
             if let Some(expn_info) = expn_info {
-                if let Some(pos) = self.expn_info_shorthands.get(&mark).cloned() {
+                if let Some(pos) = self.expn_info_shorthands.get(&expn_id).cloned() {
                     TAG_EXPANSION_INFO_SHORTHAND.encode(self)?;
                     pos.encode(self)
                 } else {
                     TAG_EXPANSION_INFO_INLINE.encode(self)?;
                     let pos = AbsoluteBytePos::new(self.position());
-                    self.expn_info_shorthands.insert(mark, pos);
+                    self.expn_info_shorthands.insert(expn_id, pos);
                     expn_info.encode(self)
                 }
             } else {

src/librustc_codegen_llvm/asm.rs

@@ -102,7 +102,7 @@ impl AsmBuilderMethods<'tcx> for Builder<'a, 'll, 'tcx> {
             let kind = llvm::LLVMGetMDKindIDInContext(self.llcx,
                 key.as_ptr() as *const c_char, key.len() as c_uint);
 
-            let val: &'ll Value = self.const_i32(ia.ctxt.outer().as_u32() as i32);
+            let val: &'ll Value = self.const_i32(ia.ctxt.outer_expn().as_u32() as i32);
 
             llvm::LLVMSetMetadata(r, kind,
                 llvm::LLVMMDNodeInContext(self.llcx, &val, 1));

src/librustc_interface/passes.rs

@@ -572,7 +572,7 @@ pub fn lower_to_hir(
 
     // Discard hygiene data, which isn't required after lowering to HIR.
     if !sess.opts.debugging_opts.keep_hygiene_data {
-        syntax::ext::hygiene::syntax_context_map();
+        syntax::ext::hygiene::clear_syntax_context_map();
     }
 
     Ok(hir_forest)

src/librustc_resolve/lib.rs

@@ -2070,7 +2070,7 @@ impl<'a> Resolver<'a> {
 
     fn macro_def(&self, mut ctxt: SyntaxContext) -> DefId {
         loop {
-            match self.macro_defs.get(&ctxt.outer()) {
+            match self.macro_defs.get(&ctxt.outer_expn()) {
                 Some(&def_id) => return def_id,
                 None => ctxt.remove_mark(),
             };
@@ -2428,7 +2428,7 @@ impl<'a> Resolver<'a> {
 
     fn hygienic_lexical_parent(&mut self, module: Module<'a>, span: &mut Span)
                                -> Option<Module<'a>> {
-        if !module.expansion.outer_is_descendant_of(span.ctxt()) {
+        if !module.expansion.outer_expn_is_descendant_of(span.ctxt()) {
             return Some(self.macro_def_scope(span.remove_mark()));
         }
 
@@ -2464,7 +2464,7 @@ impl<'a> Resolver<'a> {
             module.expansion.is_descendant_of(parent.expansion) {
                 // The macro is a proc macro derive
                 if module.expansion.looks_like_proc_macro_derive() {
-                    if parent.expansion.outer_is_descendant_of(span.ctxt()) {
+                    if parent.expansion.outer_expn_is_descendant_of(span.ctxt()) {
                         *poisoned = Some(node_id);
                         return module.parent;
                     }

src/librustc_resolve/macros.rs

@@ -139,15 +139,15 @@ impl<'a> base::Resolver for Resolver<'a> {
         let span = DUMMY_SP.fresh_expansion(ExpnId::root(), ExpnInfo::default(
             ExpnKind::Macro(MacroKind::Attr, sym::test_case), DUMMY_SP, self.session.edition()
         ));
-        let mark = span.ctxt().outer();
+        let expn_id = span.ctxt().outer_expn();
         let module = self.module_map[&self.definitions.local_def_id(id)];
-        self.definitions.set_invocation_parent(mark, module.def_id().unwrap().index);
+        self.definitions.set_invocation_parent(expn_id, module.def_id().unwrap().index);
-        self.invocations.insert(mark, self.arenas.alloc_invocation_data(InvocationData {
+        self.invocations.insert(expn_id, self.arenas.alloc_invocation_data(InvocationData {
             module,
             parent_legacy_scope: LegacyScope::Empty,
             output_legacy_scope: Cell::new(None),
         }));
-        mark
+        expn_id
     }
 
     fn resolve_dollar_crates(&mut self) {

src/libsyntax_pos/hygiene.rs

@@ -42,8 +42,8 @@ pub struct SyntaxContext(u32);
 #[derive(Debug)]
 struct SyntaxContextData {
     outer_expn: ExpnId,
-    transparency: Transparency,
+    outer_transparency: Transparency,
-    prev_ctxt: SyntaxContext,
+    parent: SyntaxContext,
     /// This context, but with all transparent and semi-transparent expansions filtered away.
     opaque: SyntaxContext,
     /// This context, but with all transparent expansions filtered away.
@@ -108,7 +108,7 @@ impl ExpnId {
 
     #[inline]
     pub fn parent(self) -> ExpnId {
-        HygieneData::with(|data| data.expn_data[self.0 as usize].parent)
+        HygieneData::with(|data| data.parent_expn(self))
     }
 
     #[inline]
@@ -129,10 +129,10 @@ impl ExpnId {
         HygieneData::with(|data| data.is_descendant_of(self, ancestor))
     }
 
-    /// `expn_id.outer_is_descendant_of(ctxt)` is equivalent to but faster than
+    /// `expn_id.outer_expn_is_descendant_of(ctxt)` is equivalent to but faster than
-    /// `expn_id.is_descendant_of(ctxt.outer())`.
+    /// `expn_id.is_descendant_of(ctxt.outer_expn())`.
-    pub fn outer_is_descendant_of(self, ctxt: SyntaxContext) -> bool {
+    pub fn outer_expn_is_descendant_of(self, ctxt: SyntaxContext) -> bool {
-        HygieneData::with(|data| data.is_descendant_of(self, data.outer(ctxt)))
+        HygieneData::with(|data| data.is_descendant_of(self, data.outer_expn(ctxt)))
     }
 
     // Used for enabling some compatibility fallback in resolve.
@@ -167,8 +167,8 @@ impl HygieneData {
             }],
             syntax_context_data: vec![SyntaxContextData {
                 outer_expn: ExpnId::root(),
-                transparency: Transparency::Opaque,
+                outer_transparency: Transparency::Opaque,
-                prev_ctxt: SyntaxContext(0),
+                parent: SyntaxContext(0),
                 opaque: SyntaxContext(0),
                 opaque_and_semitransparent: SyntaxContext(0),
                 dollar_crate_name: kw::DollarCrate,
@@ -186,6 +186,10 @@ impl HygieneData {
         ExpnId(self.expn_data.len() as u32 - 1)
     }
 
+    fn parent_expn(&self, expn_id: ExpnId) -> ExpnId {
+        self.expn_data[expn_id.0 as usize].parent
+    }
+
     fn expn_info(&self, expn_id: ExpnId) -> Option<&ExpnInfo> {
         if expn_id != ExpnId::root() {
             Some(self.expn_data[expn_id.0 as usize].expn_info.as_ref()
@@ -203,7 +207,7 @@ impl HygieneData {
             if expn_id == ExpnId::root() {
                 return false;
             }
-            expn_id = self.expn_data[expn_id.0 as usize].parent;
+            expn_id = self.parent_expn(expn_id);
         }
         true
     }
@@ -222,32 +226,29 @@ impl HygieneData {
         self.syntax_context_data[ctxt.0 as usize].opaque_and_semitransparent
     }
 
-    fn outer(&self, ctxt: SyntaxContext) -> ExpnId {
+    fn outer_expn(&self, ctxt: SyntaxContext) -> ExpnId {
         self.syntax_context_data[ctxt.0 as usize].outer_expn
     }
 
-    fn transparency(&self, ctxt: SyntaxContext) -> Transparency {
+    fn outer_transparency(&self, ctxt: SyntaxContext) -> Transparency {
-        self.syntax_context_data[ctxt.0 as usize].transparency
+        self.syntax_context_data[ctxt.0 as usize].outer_transparency
     }
 
-    fn prev_ctxt(&self, ctxt: SyntaxContext) -> SyntaxContext {
+    fn parent_ctxt(&self, ctxt: SyntaxContext) -> SyntaxContext {
-        self.syntax_context_data[ctxt.0 as usize].prev_ctxt
+        self.syntax_context_data[ctxt.0 as usize].parent
     }
 
     fn remove_mark(&self, ctxt: &mut SyntaxContext) -> ExpnId {
-        let outer_expn = self.syntax_context_data[ctxt.0 as usize].outer_expn;
+        let outer_expn = self.outer_expn(*ctxt);
-        *ctxt = self.prev_ctxt(*ctxt);
+        *ctxt = self.parent_ctxt(*ctxt);
         outer_expn
     }
 
     fn marks(&self, mut ctxt: SyntaxContext) -> Vec<(ExpnId, Transparency)> {
         let mut marks = Vec::new();
         while ctxt != SyntaxContext::empty() {
-            let outer_expn = self.outer(ctxt);
+            marks.push((self.outer_expn(ctxt), self.outer_transparency(ctxt)));
-            let transparency = self.transparency(ctxt);
+            ctxt = self.parent_ctxt(ctxt);
-            let prev_ctxt = self.prev_ctxt(ctxt);
-            marks.push((outer_expn, transparency));
-            ctxt = prev_ctxt;
         }
         marks.reverse();
         marks
@@ -255,7 +256,7 @@ impl HygieneData {
 
     fn walk_chain(&self, mut span: Span, to: SyntaxContext) -> Span {
         while span.ctxt() != crate::NO_EXPANSION && span.ctxt() != to {
-            if let Some(info) = self.expn_info(self.outer(span.ctxt())) {
+            if let Some(info) = self.expn_info(self.outer_expn(span.ctxt())) {
                 span = info.call_site;
             } else {
                 break;
@@ -266,7 +267,7 @@ impl HygieneData {
 
     fn adjust(&self, ctxt: &mut SyntaxContext, expn_id: ExpnId) -> Option<ExpnId> {
         let mut scope = None;
-        while !self.is_descendant_of(expn_id, self.outer(*ctxt)) {
+        while !self.is_descendant_of(expn_id, self.outer_expn(*ctxt)) {
             scope = Some(self.remove_mark(ctxt));
         }
         scope
@@ -320,14 +321,14 @@ impl HygieneData {
             syntax_context_data[ctxt.0 as usize].opaque_and_semitransparent;
 
         if transparency >= Transparency::Opaque {
-            let prev_ctxt = opaque;
+            let parent = opaque;
-            opaque = *self.syntax_context_map.entry((prev_ctxt, expn_id, transparency))
+            opaque = *self.syntax_context_map.entry((parent, expn_id, transparency))
                                              .or_insert_with(|| {
                 let new_opaque = SyntaxContext(syntax_context_data.len() as u32);
                 syntax_context_data.push(SyntaxContextData {
                     outer_expn: expn_id,
-                    transparency,
+                    outer_transparency: transparency,
-                    prev_ctxt,
+                    parent,
                     opaque: new_opaque,
                     opaque_and_semitransparent: new_opaque,
                     dollar_crate_name: kw::DollarCrate,
@@ -337,16 +338,16 @@ impl HygieneData {
         }
 
         if transparency >= Transparency::SemiTransparent {
-            let prev_ctxt = opaque_and_semitransparent;
+            let parent = opaque_and_semitransparent;
             opaque_and_semitransparent =
-                    *self.syntax_context_map.entry((prev_ctxt, expn_id, transparency))
+                    *self.syntax_context_map.entry((parent, expn_id, transparency))
                                             .or_insert_with(|| {
                 let new_opaque_and_semitransparent =
                     SyntaxContext(syntax_context_data.len() as u32);
                 syntax_context_data.push(SyntaxContextData {
                     outer_expn: expn_id,
-                    transparency,
+                    outer_transparency: transparency,
-                    prev_ctxt,
+                    parent,
                     opaque,
                     opaque_and_semitransparent: new_opaque_and_semitransparent,
                     dollar_crate_name: kw::DollarCrate,
@@ -355,14 +356,14 @@ impl HygieneData {
             });
         }
 
-        let prev_ctxt = ctxt;
+        let parent = ctxt;
-        *self.syntax_context_map.entry((prev_ctxt, expn_id, transparency)).or_insert_with(|| {
+        *self.syntax_context_map.entry((parent, expn_id, transparency)).or_insert_with(|| {
             let new_opaque_and_semitransparent_and_transparent =
                 SyntaxContext(syntax_context_data.len() as u32);
             syntax_context_data.push(SyntaxContextData {
                 outer_expn: expn_id,
-                transparency,
+                outer_transparency: transparency,
-                prev_ctxt,
+                parent,
                 opaque,
                 opaque_and_semitransparent,
                 dollar_crate_name: kw::DollarCrate,
@@ -372,7 +373,7 @@ impl HygieneData {
     }
 }
 
-pub fn syntax_context_map() {
+pub fn clear_syntax_context_map() {
     HygieneData::with(|data| data.syntax_context_map = FxHashMap::default());
 }
 
@@ -513,7 +514,7 @@ impl SyntaxContext {
         HygieneData::with(|data| {
             let mut scope = None;
             let mut glob_ctxt = data.modern(glob_span.ctxt());
-            while !data.is_descendant_of(expn_id, data.outer(glob_ctxt)) {
+            while !data.is_descendant_of(expn_id, data.outer_expn(glob_ctxt)) {
                 scope = Some(data.remove_mark(&mut glob_ctxt));
                 if data.remove_mark(self) != scope.unwrap() {
                     return None;
@@ -542,7 +543,7 @@ impl SyntaxContext {
 
             let mut glob_ctxt = data.modern(glob_span.ctxt());
             let mut marks = Vec::new();
-            while !data.is_descendant_of(expn_id, data.outer(glob_ctxt)) {
+            while !data.is_descendant_of(expn_id, data.outer_expn(glob_ctxt)) {
                 marks.push(data.remove_mark(&mut glob_ctxt));
             }
 
@@ -573,23 +574,23 @@ impl SyntaxContext {
     }
 
     #[inline]
-    pub fn outer(self) -> ExpnId {
+    pub fn outer_expn(self) -> ExpnId {
-        HygieneData::with(|data| data.outer(self))
+        HygieneData::with(|data| data.outer_expn(self))
     }
 
     /// `ctxt.outer_expn_info()` is equivalent to but faster than
-    /// `ctxt.outer().expn_info()`.
+    /// `ctxt.outer_expn().expn_info()`.
     #[inline]
     pub fn outer_expn_info(self) -> Option<ExpnInfo> {
-        HygieneData::with(|data| data.expn_info(data.outer(self)).cloned())
+        HygieneData::with(|data| data.expn_info(data.outer_expn(self)).cloned())
     }
 
-    /// `ctxt.outer_and_expn_info()` is equivalent to but faster than
+    /// `ctxt.outer_expn_with_info()` is equivalent to but faster than
-    /// `{ let outer = ctxt.outer(); (outer, outer.expn_info()) }`.
+    /// `{ let outer = ctxt.outer_expn(); (outer, outer.expn_info()) }`.
     #[inline]
-    pub fn outer_and_expn_info(self) -> (ExpnId, Option<ExpnInfo>) {
+    pub fn outer_expn_with_info(self) -> (ExpnId, Option<ExpnInfo>) {
         HygieneData::with(|data| {
-            let outer = data.outer(self);
+            let outer = data.outer_expn(self);
             (outer, data.expn_info(outer).cloned())
         })
     }
@@ -613,7 +614,7 @@ impl Span {
     /// but its location is inherited from the current span.
     pub fn fresh_expansion(self, parent: ExpnId, expn_info: ExpnInfo) -> Span {
         HygieneData::with(|data| {
-            let expn_id = data.fresh_expn_id(parent, Some(expn_info));
+            let expn_id = data.fresh_expn(parent, Some(expn_info));
             self.with_ctxt(data.apply_mark(SyntaxContext::empty(), expn_id))
         })
     }