move resolve_local to Scopes

6 files changed, 105 insertions, 109 deletions

diff --git a/crates/ra_analysis/src/hir/function/mod.rs b/crates/ra_analysis/src/hir/function/mod.rs
index 5e44a88a7..d171b6a8d 100644
--- a/crates/ra_analysis/src/hir/function/mod.rs
+++ b/crates/ra_analysis/src/hir/function/mod.rs
@@ -6,8 +6,8 @@ use std::{
 };
 
 use ra_syntax::{
+    TextRange, TextUnit, SyntaxNodeRef,
     ast::{self, AstNode, DocCommentsOwner, NameOwner},
-    TextRange, TextUnit,
 };
 
 use crate::{
@@ -39,6 +39,32 @@ impl FunctionDescriptor {
         FunctionDescriptor { fn_id }
     }
 
+    pub(crate) fn guess_for_name_ref(
+        db: &impl HirDatabase,
+        file_id: FileId,
+        name_ref: ast::NameRef,
+    ) -> Option<FunctionDescriptor> {
+        FunctionDescriptor::guess_for_node(db, file_id, name_ref.syntax())
+    }
+
+    pub(crate) fn guess_for_bind_pat(
+        db: &impl HirDatabase,
+        file_id: FileId,
+        bind_pat: ast::BindPat,
+    ) -> Option<FunctionDescriptor> {
+        FunctionDescriptor::guess_for_node(db, file_id, bind_pat.syntax())
+    }
+
+    fn guess_for_node(
+        db: &impl HirDatabase,
+        file_id: FileId,
+        node: SyntaxNodeRef,
+    ) -> Option<FunctionDescriptor> {
+        let fn_def = node.ancestors().find_map(ast::FnDef::cast)?;
+        let res = FunctionDescriptor::guess_from_source(db, file_id, fn_def);
+        Some(res)
+    }
+
     pub(crate) fn scope(&self, db: &impl HirDatabase) -> Arc<FnScopes> {
         db.fn_scopes(self.fn_id)
     }
diff --git a/crates/ra_analysis/src/hir/function/scope.rs b/crates/ra_analysis/src/hir/function/scope.rs
index b8bdebe47..76b2fea68 100644
--- a/crates/ra_analysis/src/hir/function/scope.rs
+++ b/crates/ra_analysis/src/hir/function/scope.rs
@@ -1,9 +1,9 @@
 use rustc_hash::{FxHashMap, FxHashSet};
 
 use ra_syntax::{
+    AstNode, SmolStr, SyntaxNodeRef, TextRange,
     algo::generate,
     ast::{self, ArgListOwner, LoopBodyOwner, NameOwner},
-    AstNode, SmolStr, SyntaxNodeRef,
 };
 
 use crate::{
@@ -70,6 +70,27 @@ impl FnScopes {
             .nth(0);
         ret
     }
+
+    pub fn find_all_refs(&self, pat: ast::BindPat) -> Vec<ReferenceDescriptor> {
+        let fn_def = pat.syntax().ancestors().find_map(ast::FnDef::cast).unwrap();
+        let name_ptr = LocalSyntaxPtr::new(pat.syntax());
+        let refs: Vec<_> = fn_def
+            .syntax()
+            .descendants()
+            .filter_map(ast::NameRef::cast)
+            .filter(|name_ref| match self.resolve_local_name(*name_ref) {
+                None => false,
+                Some(entry) => entry.ptr() == name_ptr,
+            })
+            .map(|name_ref| ReferenceDescriptor {
+                name: name_ref.syntax().text().to_string(),
+                range: name_ref.syntax().range(),
+            })
+            .collect();
+
+        refs
+    }
+
     fn root_scope(&mut self) -> ScopeId {
         self.scopes.alloc(ScopeData {
             parent: None,
@@ -262,6 +283,12 @@ fn compute_expr_scopes(expr: ast::Expr, scopes: &mut FnScopes, scope: ScopeId) {
     }
 }
 
+#[derive(Debug)]
+pub struct ReferenceDescriptor {
+    pub range: TextRange,
+    pub name: String,
+}
+
 #[cfg(test)]
 mod tests {
     use ra_editor::find_node_at_offset;
diff --git a/crates/ra_analysis/src/hir/mod.rs b/crates/ra_analysis/src/hir/mod.rs
index 5a9086cef..e234173a9 100644
--- a/crates/ra_analysis/src/hir/mod.rs
+++ b/crates/ra_analysis/src/hir/mod.rs
@@ -11,15 +11,9 @@ mod function;
 mod module;
 mod path;
 
-use ra_syntax::{
-    ast::{self, AstNode},
-    TextRange,
-};
-
 use crate::{
     hir::db::HirDatabase,
     loc2id::{DefId, DefLoc},
-    syntax_ptr::LocalSyntaxPtr,
     Cancelable,
 };
 
@@ -49,50 +43,3 @@ impl DefId {
         Ok(res)
     }
 }
-
-#[derive(Debug)]
-pub struct ReferenceDescriptor {
-    pub range: TextRange,
-    pub name: String,
-}
-
-#[derive(Debug)]
-pub struct DeclarationDescriptor<'a> {
-    pat: ast::BindPat<'a>,
-    pub range: TextRange,
-}
-
-impl<'a> DeclarationDescriptor<'a> {
-    pub fn new(pat: ast::BindPat) -> DeclarationDescriptor {
-        let range = pat.syntax().range();
-
-        DeclarationDescriptor { pat, range }
-    }
-
-    pub fn find_all_refs(&self) -> Vec<ReferenceDescriptor> {
-        let name_ptr = LocalSyntaxPtr::new(self.pat.syntax());
-
-        let fn_def = match self.pat.syntax().ancestors().find_map(ast::FnDef::cast) {
-            Some(def) => def,
-            None => return Default::default(),
-        };
-
-        let fn_scopes = FnScopes::new(fn_def);
-
-        let refs: Vec<_> = fn_def
-            .syntax()
-            .descendants()
-            .filter_map(ast::NameRef::cast)
-            .filter(|name_ref| match fn_scopes.resolve_local_name(*name_ref) {
-                None => false,
-                Some(entry) => entry.ptr() == name_ptr,
-            })
-            .map(|name_ref| ReferenceDescriptor {
-                name: name_ref.syntax().text().to_string(),
-                range: name_ref.syntax().range(),
-            })
-            .collect();
-
-        refs
-    }
-}
diff --git a/crates/ra_analysis/src/imp.rs b/crates/ra_analysis/src/imp.rs
index b16edb969..377f7420f 100644
--- a/crates/ra_analysis/src/imp.rs
+++ b/crates/ra_analysis/src/imp.rs
@@ -7,7 +7,7 @@ use std::{
 use ra_editor::{self, find_node_at_offset, FileSymbol, LineIndex, LocalEdit};
 use ra_syntax::{
     ast::{self, ArgListOwner, Expr, NameOwner},
-    AstNode, SourceFileNode, SmolStr,
+    AstNode, SourceFileNode,
     SyntaxKind::*,
     SyntaxNodeRef, TextRange, TextUnit,
 };
@@ -22,7 +22,6 @@ use crate::{
     hir::{
         FunctionDescriptor, FnSignatureInfo, ModuleDescriptor,
         Problem,
-        DeclarationDescriptor,
     },
     input::{FilesDatabase, SourceRoot, SourceRootId, WORKSPACE},
     symbol_index::SymbolIndex,
@@ -273,24 +272,27 @@ impl AnalysisImpl {
         let file = self.db.file_syntax(position.file_id);
         let syntax = file.syntax();
         if let Some(name_ref) = find_node_at_offset::<ast::NameRef>(syntax, position.offset) {
-            // First try to resolve the symbol locally
-            return if let Some((name, range)) =
-                resolve_local_name(&self.db, position.file_id, name_ref)
+            if let Some(fn_descr) =
+                FunctionDescriptor::guess_for_name_ref(&*self.db, position.file_id, name_ref)
             {
-                let mut vec = vec![];
-                vec.push((
-                    position.file_id,
-                    FileSymbol {
-                        name,
-                        node_range: range,
-                        kind: NAME,
-                    },
-                ));
-                Ok(vec)
-            } else {
-                // If that fails try the index based approach.
-                self.index_resolve(name_ref)
-            };
+                let scope = fn_descr.scope(&*self.db);
+                // First try to resolve the symbol locally
+                return if let Some(entry) = scope.resolve_local_name(name_ref) {
+                    let mut vec = vec![];
+                    vec.push((
+                        position.file_id,
+                        FileSymbol {
+                            name: entry.name().clone(),
+                            node_range: entry.ptr().range(),
+                            kind: NAME,
+                        },
+                    ));
+                    Ok(vec)
+                } else {
+                    // If that fails try the index based approach.
+                    self.index_resolve(name_ref)
+                };
+            }
         }
         if let Some(name) = find_node_at_offset::<ast::Name>(syntax, position.offset) {
             if let Some(module) = name.syntax().parent().and_then(ast::Module::cast) {
@@ -320,31 +322,41 @@ impl AnalysisImpl {
 
     pub fn find_all_refs(&self, position: FilePosition) -> Vec<(FileId, TextRange)> {
         let file = self.db.file_syntax(position.file_id);
-        let syntax = file.syntax();
-
         // Find the binding associated with the offset
-        let maybe_binding =
-            find_node_at_offset::<ast::BindPat>(syntax, position.offset).or_else(|| {
-                let name_ref = find_node_at_offset::<ast::NameRef>(syntax, position.offset)?;
-                let resolved = resolve_local_name(&self.db, position.file_id, name_ref)?;
-                find_node_at_offset::<ast::BindPat>(syntax, resolved.1.end())
-            });
-
-        let binding = match maybe_binding {
+        let (binding, descr) = match find_binding(&self.db, &file, position) {
             None => return Vec::new(),
             Some(it) => it,
         };
 
-        let decl = DeclarationDescriptor::new(binding);
-
-        let mut ret = vec![(position.file_id, decl.range)];
+        let mut ret = vec![(position.file_id, binding.syntax().range())];
         ret.extend(
-            decl.find_all_refs()
+            descr
+                .scope(&*self.db)
+                .find_all_refs(binding)
                 .into_iter()
                 .map(|ref_desc| (position.file_id, ref_desc.range)),
         );
 
-        ret
+        return ret;
+
+        fn find_binding<'a>(
+            db: &db::RootDatabase,
+            source_file: &'a SourceFileNode,
+            position: FilePosition,
+        ) -> Option<(ast::BindPat<'a>, FunctionDescriptor)> {
+            let syntax = source_file.syntax();
+            if let Some(binding) = find_node_at_offset::<ast::BindPat>(syntax, position.offset) {
+                let descr = FunctionDescriptor::guess_for_bind_pat(db, position.file_id, binding)?;
+                return Some((binding, descr));
+            };
+            let name_ref = find_node_at_offset::<ast::NameRef>(syntax, position.offset)?;
+            let descr = FunctionDescriptor::guess_for_name_ref(db, position.file_id, name_ref)?;
+            let scope = descr.scope(db);
+            let resolved = scope.resolve_local_name(name_ref)?;
+            let resolved = resolved.ptr().resolve(source_file);
+            let binding = find_node_at_offset::<ast::BindPat>(syntax, resolved.range().end())?;
+            Some((binding, descr))
+        }
     }
 
     pub fn doc_comment_for(
@@ -582,16 +594,3 @@ impl<'a> FnCallNode<'a> {
         }
     }
 }
-
-fn resolve_local_name(
-    db: &db::RootDatabase,
-    file_id: FileId,
-    name_ref: ast::NameRef,
-) -> Option<(SmolStr, TextRange)> {
-    let fn_def = name_ref.syntax().ancestors().find_map(ast::FnDef::cast)?;
-    let function = FunctionDescriptor::guess_from_source(db, file_id, fn_def);
-    let scopes = function.scope(db);
-    let scope_entry = scopes.resolve_local_name(name_ref)?;
-    let syntax = db.resolve_syntax_ptr(scope_entry.ptr().into_global(file_id));
-    Some((scope_entry.name().clone(), syntax.range()))
-}
diff --git a/crates/ra_analysis/src/syntax_ptr.rs b/crates/ra_analysis/src/syntax_ptr.rs
index e45934ce0..3168e82a7 100644
--- a/crates/ra_analysis/src/syntax_ptr.rs
+++ b/crates/ra_analysis/src/syntax_ptr.rs
@@ -56,11 +56,8 @@ impl LocalSyntaxPtr {
         }
     }
 
-    pub(crate) fn into_global(self, file_id: FileId) -> SyntaxPtr {
-        SyntaxPtr {
-            file_id,
-            local: self,
-        }
+    pub(crate) fn range(self) -> TextRange {
+        self.range
     }
 }
 
diff --git a/crates/ra_analysis/tests/tests.rs b/crates/ra_analysis/tests/tests.rs
index 72b2ebf97..8e7856027 100644
--- a/crates/ra_analysis/tests/tests.rs
+++ b/crates/ra_analysis/tests/tests.rs
@@ -10,10 +10,10 @@ use test_utils::assert_eq_dbg;
 
 use ra_analysis::{
     mock_analysis::{analysis_and_position, single_file, single_file_with_position, MockAnalysis},
-    AnalysisChange, CrateGraph, FileId, FnDescriptor,
+    AnalysisChange, CrateGraph, FileId, FnSignatureInfo,
 };
 
-fn get_signature(text: &str) -> (FnDescriptor, Option<usize>) {
+fn get_signature(text: &str) -> (FnSignatureInfo, Option<usize>) {
     let (analysis, position) = single_file_with_position(text);
     analysis.resolve_callable(position).unwrap().unwrap()
 }