Merge #900

900: Add new trait ast::TypeAscriptionOwner r=vipentti a=vipentti

This trait should be implemented for nodes which have an ascribed type,
e.g. thing : Type. Such as let, const, static, param, named struct fields.

In addition, we update some places where previously we used node + node.type_ref() with `TypeAscriptionOwner` in the trait bounds.

Co-authored-by: Ville Penttinen <[email protected]>

1 files changed, 10 insertions, 4 deletions

diff --git a/crates/ra_ide_api_light/src/structure.rs b/crates/ra_ide_api_light/src/structure.rs
index dea494daa..ec2c9bbc6 100644
--- a/crates/ra_ide_api_light/src/structure.rs
+++ b/crates/ra_ide_api_light/src/structure.rs
@@ -2,7 +2,7 @@ use crate::TextRange;
 
 use ra_syntax::{
     algo::visit::{visitor, Visitor},
-    ast::{self, AttrsOwner, NameOwner, TypeParamsOwner},
+    ast::{self, AttrsOwner, NameOwner, TypeParamsOwner, TypeAscriptionOwner},
     AstNode, SourceFile, SyntaxKind, SyntaxNode, WalkEvent,
 };
 
@@ -45,6 +45,12 @@ fn structure_node(node: &SyntaxNode) -> Option<StructureNode> {
         decl_with_detail(node, None)
     }
 
+    fn decl_with_ascription<N: NameOwner + AttrsOwner + TypeAscriptionOwner>(
+        node: &N,
+    ) -> Option<StructureNode> {
+        decl_with_type_ref(node, node.ascribed_type())
+    }
+
     fn decl_with_type_ref<N: NameOwner + AttrsOwner>(
         node: &N,
         type_ref: Option<&ast::TypeRef>,
@@ -107,14 +113,14 @@ fn structure_node(node: &SyntaxNode) -> Option<StructureNode> {
             decl_with_detail(fn_def, Some(detail))
         })
         .visit(decl::<ast::StructDef>)
-        .visit(|nfd: &ast::NamedFieldDef| decl_with_type_ref(nfd, nfd.type_ref()))
         .visit(decl::<ast::EnumDef>)
         .visit(decl::<ast::EnumVariant>)
         .visit(decl::<ast::TraitDef>)
         .visit(decl::<ast::Module>)
         .visit(|td: &ast::TypeAliasDef| decl_with_type_ref(td, td.type_ref()))
-        .visit(|cd: &ast::ConstDef| decl_with_type_ref(cd, cd.type_ref()))
-        .visit(|sd: &ast::StaticDef| decl_with_type_ref(sd, sd.type_ref()))
+        .visit(decl_with_ascription::<ast::NamedFieldDef>)
+        .visit(decl_with_ascription::<ast::ConstDef>)
+        .visit(decl_with_ascription::<ast::StaticDef>)
         .visit(|im: &ast::ImplBlock| {
             let target_type = im.target_type()?;
             let target_trait = im.target_trait();