Merge #98

98: WIP: Add resolve_local_name to resolve names in a function scope r=kjeremy a=kjeremy

First step to resolving #80 

Co-authored-by: Jeremy A. Kolb <[email protected]>

1 files changed, 9 insertions, 1 deletions

diff --git a/crates/ra_editor/src/lib.rs b/crates/ra_editor/src/lib.rs
index a93924e00..2a801f7da 100644
--- a/crates/ra_editor/src/lib.rs
+++ b/crates/ra_editor/src/lib.rs
@@ -19,7 +19,7 @@ mod scope;
 mod test_utils;
 
 use ra_syntax::{
-    File, TextUnit, TextRange, SyntaxNodeRef,
+    File, TextUnit, TextRange, SmolStr, SyntaxNodeRef,
     ast::{self, AstNode, NameOwner},
     algo::find_leaf_at_offset,
     SyntaxKind::{self, *},
@@ -164,6 +164,14 @@ pub fn find_node_at_offset<'a, N: AstNode<'a>>(
         .next()
 }
 
+pub fn resolve_local_name(file: &File, offset: TextUnit, name_ref: ast::NameRef) -> Option<(SmolStr, TextRange)> {
+    let fn_def = find_node_at_offset::<ast::FnDef>(file.syntax(), offset)?;
+    let scopes = scope::FnScopes::new(fn_def);
+    let scope_entry = scope::resolve_local_name(name_ref, &scopes)?;
+    let name = scope_entry.ast().name()?;
+    Some((scope_entry.name(), name.syntax().range()))
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;