Simplify Diagnostic structure

It's not entirely clear what subnode ranges should mean in the
presence of macros, so let's leave them out for now. We are not using
them heavily anyway.

crates/ra_hir_def/src/diagnostics.rs

@@ -4,7 +4,7 @@ use std::any::Any;
 
 use hir_expand::diagnostics::Diagnostic;
 use ra_db::RelativePathBuf;
-use ra_syntax::{ast, AstPtr, SyntaxNodePtr, TextRange};
+use ra_syntax::{ast, AstPtr, SyntaxNodePtr};
 
 use hir_expand::{HirFileId, InFile};
 
@@ -12,7 +12,6 @@ use hir_expand::{HirFileId, InFile};
 pub struct UnresolvedModule {
     pub file: HirFileId,
     pub decl: AstPtr<ast::Module>,
-    pub highlight_range: TextRange,
     pub candidate: RelativePathBuf,
 }
 
@@ -20,9 +19,6 @@ impl Diagnostic for UnresolvedModule {
     fn message(&self) -> String {
         "unresolved module".to_string()
     }
-    fn highlight_range(&self) -> InFile<TextRange> {
-        InFile::new(self.file, self.highlight_range)
-    }
     fn source(&self) -> InFile<SyntaxNodePtr> {
         InFile::new(self.file, self.decl.clone().into())
     }

crates/ra_hir_def/src/nameres.rs

@@ -297,7 +297,7 @@ pub enum ModuleSource {
 mod diagnostics {
     use hir_expand::diagnostics::DiagnosticSink;
     use ra_db::RelativePathBuf;
-    use ra_syntax::{ast, AstNode, AstPtr};
+    use ra_syntax::{ast, AstPtr};
 
     use crate::{db::DefDatabase, diagnostics::UnresolvedModule, nameres::LocalModuleId, AstId};
 
@@ -326,7 +326,6 @@ mod diagnostics {
                     sink.push(UnresolvedModule {
                         file: declaration.file_id,
                         decl: AstPtr::new(&decl),
-                        highlight_range: decl.syntax().text_range(),
                         candidate: candidate.clone(),
                     })
                 }

crates/ra_hir_expand/src/diagnostics.rs

@@ -16,13 +16,12 @@
 
 use std::{any::Any, fmt};
 
-use ra_syntax::{SyntaxNode, SyntaxNodePtr, TextRange};
+use ra_syntax::{SyntaxNode, SyntaxNodePtr};
 
 use crate::{db::AstDatabase, InFile};
 
 pub trait Diagnostic: Any + Send + Sync + fmt::Debug + 'static {
     fn message(&self) -> String;
-    fn highlight_range(&self) -> InFile<TextRange>;
     fn source(&self) -> InFile<SyntaxNodePtr>;
     fn as_any(&self) -> &(dyn Any + Send + 'static);
 }

crates/ra_hir_ty/src/diagnostics.rs

@@ -3,7 +3,7 @@
 use std::any::Any;
 
 use hir_expand::{db::AstDatabase, name::Name, HirFileId, InFile};
-use ra_syntax::{ast, AstNode, AstPtr, SyntaxNodePtr, TextRange};
+use ra_syntax::{ast, AstNode, AstPtr, SyntaxNodePtr};
 use stdx::format_to;
 
 pub use hir_def::{diagnostics::UnresolvedModule, expr::MatchArm};
@@ -13,7 +13,6 @@ pub use hir_expand::diagnostics::{AstDiagnostic, Diagnostic, DiagnosticSink};
 pub struct NoSuchField {
     pub file: HirFileId,
     pub field: AstPtr<ast::RecordField>,
-    pub highlight_range: TextRange,
 }
 
 impl Diagnostic for NoSuchField {
@@ -21,10 +20,6 @@ impl Diagnostic for NoSuchField {
         "no such field".to_string()
     }
 
-    fn highlight_range(&self) -> InFile<TextRange> {
-        InFile::new(self.file, self.highlight_range)
-    }
-
     fn source(&self) -> InFile<SyntaxNodePtr> {
         InFile::new(self.file, self.field.clone().into())
     }
@@ -38,7 +33,6 @@ impl Diagnostic for NoSuchField {
 pub struct MissingFields {
     pub file: HirFileId,
     pub field_list: AstPtr<ast::RecordFieldList>,
-    pub highlight_range: TextRange,
     pub missed_fields: Vec<Name>,
 }
 
@@ -50,10 +44,6 @@ impl Diagnostic for MissingFields {
         }
         buf
     }
-    fn highlight_range(&self) -> InFile<TextRange> {
-        InFile::new(self.file, self.highlight_range)
-    }
-
     fn source(&self) -> InFile<SyntaxNodePtr> {
         InFile { file_id: self.file, value: self.field_list.clone().into() }
     }
@@ -76,7 +66,6 @@ impl AstDiagnostic for MissingFields {
 pub struct MissingPatFields {
     pub file: HirFileId,
     pub field_list: AstPtr<ast::RecordFieldPatList>,
-    pub highlight_range: TextRange,
     pub missed_fields: Vec<Name>,
 }
 
@@ -88,9 +77,6 @@ impl Diagnostic for MissingPatFields {
         }
         buf
     }
-    fn highlight_range(&self) -> InFile<TextRange> {
-        InFile::new(self.file, self.highlight_range)
-    }
     fn source(&self) -> InFile<SyntaxNodePtr> {
         InFile { file_id: self.file, value: self.field_list.clone().into() }
     }
@@ -104,16 +90,12 @@ pub struct MissingMatchArms {
     pub file: HirFileId,
     pub match_expr: AstPtr<ast::Expr>,
     pub arms: AstPtr<ast::MatchArmList>,
-    pub highlight_range: TextRange,
 }
 
 impl Diagnostic for MissingMatchArms {
     fn message(&self) -> String {
         String::from("Missing match arm")
     }
-    fn highlight_range(&self) -> InFile<TextRange> {
-        InFile::new(self.file, self.highlight_range)
-    }
     fn source(&self) -> InFile<SyntaxNodePtr> {
         InFile { file_id: self.file, value: self.match_expr.clone().into() }
     }
@@ -126,16 +108,12 @@ impl Diagnostic for MissingMatchArms {
 pub struct MissingOkInTailExpr {
     pub file: HirFileId,
     pub expr: AstPtr<ast::Expr>,
-    pub highlight_range: TextRange,
 }
 
 impl Diagnostic for MissingOkInTailExpr {
     fn message(&self) -> String {
         "wrap return expression in Ok".to_string()
     }
-    fn highlight_range(&self) -> InFile<TextRange> {
-        InFile::new(self.file, self.highlight_range)
-    }
     fn source(&self) -> InFile<SyntaxNodePtr> {
         InFile { file_id: self.file, value: self.expr.clone().into() }
     }

crates/ra_hir_ty/src/expr.rs

@@ -4,7 +4,7 @@ use std::sync::Arc;
 
 use hir_def::{path::path, resolver::HasResolver, AdtId, FunctionId};
 use hir_expand::diagnostics::DiagnosticSink;
-use ra_syntax::{ast, AstNode, AstPtr};
+use ra_syntax::{ast, AstPtr};
 use rustc_hash::FxHashSet;
 
 use crate::{
@@ -100,7 +100,6 @@ impl<'a, 'b> ExprValidator<'a, 'b> {
                     self.sink.push(MissingFields {
                         file: source_ptr.file_id,
                         field_list: AstPtr::new(&field_list),
-                        highlight_range: field_list.syntax().text_range(),
                         missed_fields,
                     })
                 }
@@ -131,7 +130,6 @@ impl<'a, 'b> ExprValidator<'a, 'b> {
                         self.sink.push(MissingPatFields {
                             file: source_ptr.file_id,
                             field_list: AstPtr::new(&field_list),
-                            highlight_range: field_list.syntax().text_range(),
                             missed_fields,
                         })
                     }
@@ -215,7 +213,6 @@ impl<'a, 'b> ExprValidator<'a, 'b> {
                         file: source_ptr.file_id,
                         match_expr: AstPtr::new(&match_expr),
                         arms: AstPtr::new(&arms),
-                        highlight_range: match_expr.syntax().text_range(),
                     })
                 }
             }
@@ -247,13 +244,8 @@ impl<'a, 'b> ExprValidator<'a, 'b> {
             let (_, source_map) = db.body_with_source_map(self.func.into());
 
             if let Ok(source_ptr) = source_map.expr_syntax(id) {
-                let root = source_ptr.file_syntax(db.upcast());
+                self.sink
-                let highlight_range = source_ptr.value.to_node(&root).syntax().text_range();
+                    .push(MissingOkInTailExpr { file: source_ptr.file_id, expr: source_ptr.value });
-                self.sink.push(MissingOkInTailExpr {
-                    file: source_ptr.file_id,
-                    expr: source_ptr.value,
-                    highlight_range,
-                });
             }
         }
     }

crates/ra_hir_ty/src/infer.rs

@@ -665,7 +665,6 @@ impl Expectation {
 mod diagnostics {
     use hir_def::{expr::ExprId, src::HasSource, FunctionId, Lookup};
     use hir_expand::diagnostics::DiagnosticSink;
-    use ra_syntax::AstNode;
 
     use crate::{db::HirDatabase, diagnostics::NoSuchField};
 
@@ -686,13 +685,7 @@ mod diagnostics {
                     let source = owner.lookup(db.upcast()).source(db.upcast());
                     let (_, source_map) = db.body_with_source_map(owner.into());
                     let field = source_map.field_syntax(*expr, *field);
-                    let root = field.file_syntax(db.upcast());
+                    sink.push(NoSuchField { file: source.file_id, field: field.value })
-                    let highlight_range = field.value.to_node(&root).syntax().text_range();
-                    sink.push(NoSuchField {
-                        file: source.file_id,
-                        field: field.value,
-                        highlight_range,
-                    })
                 }
             }
         }