Make records grammar more orthogonal

We used

  name [: expr]

grammar before, now it is

  [name :] expr

which makes things simpler

crates/ra_hir/src/source_analyzer.rs

@@ -139,7 +139,7 @@ impl SourceAnalyzer {
         &self,
         db: &dyn HirDatabase,
         field: &ast::FieldExpr,
-    ) -> Option<crate::StructField> {
+    ) -> Option<StructField> {
         let expr_id = self.expr_id(db, &field.clone().into())?;
         self.infer.as_ref()?.field_resolution(expr_id).map(|it| it.into())
     }
@@ -148,21 +148,19 @@ impl SourceAnalyzer {
         &self,
         db: &dyn HirDatabase,
         field: &ast::RecordField,
-    ) -> Option<(crate::StructField, Option<Local>)> {
+    ) -> Option<(StructField, Option<Local>)> {
-        let (expr_id, local) = match field.expr() {
+        let expr = field.expr()?;
-            Some(it) => (self.expr_id(db, &it)?, None),
+        let expr_id = self.expr_id(db, &expr)?;
-            None => {
+        let local = if field.name_ref().is_some() {
-                let src = InFile { file_id: self.file_id, value: field };
+            None
-                let expr_id = self.body_source_map.as_ref()?.field_init_shorthand_expr(src)?;
+        } else {
-                let local_name = field.name_ref()?.as_name();
+            let local_name = field.field_name()?.as_name();
             let path = ModPath::from_segments(PathKind::Plain, once(local_name));
-                let local = match self.resolver.resolve_path_in_value_ns_fully(db.upcast(), &path) {
+            match self.resolver.resolve_path_in_value_ns_fully(db.upcast(), &path) {
                 Some(ValueNs::LocalBinding(pat_id)) => {
                     Some(Local { pat_id, parent: self.resolver.body_owner()? })
                 }
                 _ => None,
-                };
-                (expr_id, local)
             }
         };
         let struct_field = self.infer.as_ref()?.record_field_resolution(expr_id)?;

crates/ra_hir_def/src/body.rs

@@ -294,11 +294,6 @@ impl BodySourceMap {
         self.expansions.get(&src).cloned()
     }
 
-    pub fn field_init_shorthand_expr(&self, node: InFile<&ast::RecordField>) -> Option<ExprId> {
-        let src = node.map(|it| Either::Right(AstPtr::new(it)));
-        self.expr_map.get(&src).cloned()
-    }
-
     pub fn pat_syntax(&self, pat: PatId) -> Result<PatSource, SyntheticSyntax> {
         self.pat_map_back[pat].clone()
     }

crates/ra_hir_def/src/body/lower.rs

@@ -27,7 +27,6 @@ use crate::{
     },
     item_scope::BuiltinShadowMode,
     path::GenericArgs,
-    path::Path,
     type_ref::{Mutability, TypeRef},
     AdtId, ConstLoc, ContainerId, DefWithBodyId, EnumLoc, FunctionLoc, Intern, ModuleDefId,
     StaticLoc, StructLoc, TraitLoc, TypeAliasLoc, UnionLoc,
@@ -113,13 +112,6 @@ impl ExprCollector<'_> {
     fn alloc_expr_desugared(&mut self, expr: Expr) -> ExprId {
         self.make_expr(expr, Err(SyntheticSyntax))
     }
-    fn alloc_expr_field_shorthand(&mut self, expr: Expr, ptr: AstPtr<ast::RecordField>) -> ExprId {
-        let ptr = Either::Right(ptr);
-        let src = self.expander.to_source(ptr);
-        let id = self.make_expr(expr, Ok(src.clone()));
-        self.source_map.expr_map.insert(src, id);
-        id
-    }
     fn empty_block(&mut self) -> ExprId {
         self.alloc_expr_desugared(Expr::Block { statements: Vec::new(), tail: None })
     }
@@ -309,22 +301,13 @@ impl ExprCollector<'_> {
                             if !self.expander.is_cfg_enabled(&attrs) {
                                 return None;
                             }
+                            let name = field.field_name()?.as_name();
 
                             Some(RecordLitField {
-                                name: field
+                                name,
-                                    .name_ref()
+                                expr: match field.expr() {
-                                    .map(|nr| nr.as_name())
+                                    Some(e) => self.collect_expr(e),
-                                    .unwrap_or_else(Name::missing),
+                                    None => self.missing_expr(),
-                                expr: if let Some(e) = field.expr() {
-                                    self.collect_expr(e)
-                                } else if let Some(nr) = field.name_ref() {
-                                    // field shorthand
-                                    self.alloc_expr_field_shorthand(
-                                        Expr::Path(Path::from_name_ref(&nr)),
-                                        AstPtr::new(&field),
-                                    )
-                                } else {
-                                    self.missing_expr()
                                 },
                             })
                         })

crates/ra_hir_def/src/path.rs

@@ -134,11 +134,6 @@ impl Path {
         lower::lower_path(path, hygiene)
     }
 
-    /// Converts an `ast::NameRef` into a single-identifier `Path`.
-    pub(crate) fn from_name_ref(name_ref: &ast::NameRef) -> Path {
-        Path { type_anchor: None, mod_path: name_ref.as_name().into(), generic_args: vec![None] }
-    }
-
     /// Converts a known mod path to `Path`.
     pub(crate) fn from_known_path(
         path: ModPath,

crates/ra_ide/src/completion/complete_unqualified_path.rs

@@ -3,7 +3,7 @@
 use crate::completion::{CompletionContext, Completions};
 
 pub(super) fn complete_unqualified_path(acc: &mut Completions, ctx: &CompletionContext) {
-    if !(ctx.is_trivial_path && !ctx.is_pat_binding_or_const) {
+    if !(ctx.is_trivial_path && !ctx.is_pat_binding_or_const && !ctx.record_lit_syntax.is_some()) {
         return;
     }
 

crates/ra_ide/src/completion/completion_context.rs

@@ -227,7 +227,7 @@ impl<'a> CompletionContext<'a> {
         self.name_ref_syntax =
             find_node_at_offset(&original_file, name_ref.syntax().text_range().start());
         let name_range = name_ref.syntax().text_range();
-        if name_ref.syntax().parent().and_then(ast::RecordField::cast).is_some() {
+        if ast::RecordField::for_field_name(&name_ref).is_some() {
             self.record_lit_syntax =
                 self.sema.find_node_at_offset_with_macros(&original_file, offset);
         }

crates/ra_ide_db/src/defs.rs

@@ -216,7 +216,7 @@ pub fn classify_name_ref(
         }
     }
 
-    if let Some(record_field) = ast::RecordField::cast(parent.clone()) {
+    if let Some(record_field) = ast::RecordField::for_field_name(name_ref) {
         tested_by!(goto_def_for_record_fields; force);
         tested_by!(goto_def_for_field_init_shorthand; force);
         if let Some((field, local)) = sema.resolve_record_field(&record_field) {

crates/ra_parser/src/grammar/expressions.rs

@@ -619,26 +619,39 @@ pub(crate) fn record_field_list(p: &mut Parser) {
     let m = p.start();
     p.bump(T!['{']);
     while !p.at(EOF) && !p.at(T!['}']) {
-        match p.current() {
+        let m = p.start();
         // test record_literal_field_with_attr
         // fn main() {
         //     S { #[cfg(test)] field: 1 }
         // }
-            IDENT | INT_NUMBER | T![#] => {
-                let m = p.start();
         attributes::outer_attributes(p);
+
+        match p.current() {
+            IDENT | INT_NUMBER => {
+                // test_err record_literal_before_ellipsis_recovery
+                // fn main() {
+                //     S { field ..S::default() }
+                // }
+                if p.nth_at(1, T![:]) || p.nth_at(1, T![..]) {
                     name_ref_or_index(p);
-                if p.eat(T![:]) {
+                    p.expect(T![:]);
-                    expr(p);
                 }
+                expr(p);
                 m.complete(p, RECORD_FIELD);
             }
             T![.] if p.at(T![..]) => {
+                m.abandon(p);
                 p.bump(T![..]);
                 expr(p);
             }
-            T!['{'] => error_block(p, "expected a field"),
+            T!['{'] => {
-            _ => p.err_and_bump("expected identifier"),
+                error_block(p, "expected a field");
+                m.abandon(p);
+            }
+            _ => {
+                p.err_and_bump("expected identifier");
+                m.abandon(p);
+            }
         }
         if !p.at(T!['}']) {
             p.expect(T![,]);

crates/ra_syntax/src/ast/extensions.rs

@@ -187,6 +187,38 @@ impl ast::StructDef {
     }
 }
 
+impl ast::RecordField {
+    pub fn for_field_name(field_name: &ast::NameRef) -> Option<ast::RecordField> {
+        eprintln!("field_name = {}", field_name);
+        dbg!(field_name.syntax().ancestors().nth(6));
+        let candidate =
+            field_name.syntax().parent().and_then(ast::RecordField::cast).or_else(|| {
+                field_name.syntax().ancestors().nth(4).and_then(ast::RecordField::cast)
+            })?;
+        if candidate.field_name().as_ref() == Some(field_name) {
+            Some(candidate)
+        } else {
+            None
+        }
+    }
+
+    /// Deals with field init shorthand
+    pub fn field_name(&self) -> Option<ast::NameRef> {
+        if let Some(name_ref) = self.name_ref() {
+            return Some(name_ref);
+        }
+        if let Some(ast::Expr::PathExpr(expr)) = self.expr() {
+            let path = expr.path()?;
+            let segment = path.segment()?;
+            let name_ref = segment.name_ref()?;
+            if path.qualifier().is_none() {
+                return Some(name_ref);
+            }
+        }
+        None
+    }
+}
+
 impl ast::EnumVariant {
     pub fn parent_enum(&self) -> ast::EnumDef {
         self.syntax()

crates/ra_syntax/test_data/parser/inline/err/0014_record_literal_before_ellipsis_recovery.rast

@@ -0,0 +1,49 @@
+SOURCE_FILE@[0; 45)
+  FN_DEF@[0; 44)
+    FN_KW@[0; 2) "fn"
+    WHITESPACE@[2; 3) " "
+    NAME@[3; 7)
+      IDENT@[3; 7) "main"
+    PARAM_LIST@[7; 9)
+      L_PAREN@[7; 8) "("
+      R_PAREN@[8; 9) ")"
+    WHITESPACE@[9; 10) " "
+    BLOCK_EXPR@[10; 44)
+      BLOCK@[10; 44)
+        L_CURLY@[10; 11) "{"
+        WHITESPACE@[11; 16) "\n    "
+        RECORD_LIT@[16; 42)
+          PATH@[16; 17)
+            PATH_SEGMENT@[16; 17)
+              NAME_REF@[16; 17)
+                IDENT@[16; 17) "S"
+          WHITESPACE@[17; 18) " "
+          RECORD_FIELD_LIST@[18; 42)
+            L_CURLY@[18; 19) "{"
+            WHITESPACE@[19; 20) " "
+            RECORD_FIELD@[20; 40)
+              NAME_REF@[20; 25)
+                IDENT@[20; 25) "field"
+              WHITESPACE@[25; 26) " "
+              RANGE_EXPR@[26; 40)
+                DOT2@[26; 28) ".."
+                CALL_EXPR@[28; 40)
+                  PATH_EXPR@[28; 38)
+                    PATH@[28; 38)
+                      PATH@[28; 29)
+                        PATH_SEGMENT@[28; 29)
+                          NAME_REF@[28; 29)
+                            IDENT@[28; 29) "S"
+                      COLON2@[29; 31) "::"
+                      PATH_SEGMENT@[31; 38)
+                        NAME_REF@[31; 38)
+                          IDENT@[31; 38) "default"
+                  ARG_LIST@[38; 40)
+                    L_PAREN@[38; 39) "("
+                    R_PAREN@[39; 40) ")"
+            WHITESPACE@[40; 41) " "
+            R_CURLY@[41; 42) "}"
+        WHITESPACE@[42; 43) "\n"
+        R_CURLY@[43; 44) "}"
+  WHITESPACE@[44; 45) "\n"
+error [25; 25): expected COLON

crates/ra_syntax/test_data/parser/inline/err/0014_record_literal_before_ellipsis_recovery.rs

@@ -0,0 +1,3 @@
+fn main() {
+    S { field ..S::default() }
+}

crates/ra_syntax/test_data/parser/inline/ok/0061_record_lit.rast

@@ -35,6 +35,9 @@ SOURCE_FILE@[0; 112)
               L_CURLY@[27; 28) "{"
               WHITESPACE@[28; 29) " "
               RECORD_FIELD@[29; 30)
+                PATH_EXPR@[29; 30)
+                  PATH@[29; 30)
+                    PATH_SEGMENT@[29; 30)
                       NAME_REF@[29; 30)
                         IDENT@[29; 30) "x"
               COMMA@[30; 31) ","
@@ -62,6 +65,9 @@ SOURCE_FILE@[0; 112)
               L_CURLY@[48; 49) "{"
               WHITESPACE@[49; 50) " "
               RECORD_FIELD@[50; 51)
+                PATH_EXPR@[50; 51)
+                  PATH@[50; 51)
+                    PATH_SEGMENT@[50; 51)
                       NAME_REF@[50; 51)
                         IDENT@[50; 51) "x"
               COMMA@[51; 52) ","

crates/test_utils/src/lib.rs

@@ -395,7 +395,7 @@ pub fn skip_slow_tests() -> bool {
     should_skip
 }
 
-const REWRITE: bool = true;
+const REWRITE: bool = false;
 
 /// Asserts that `expected` and `actual` strings are equal. If they differ only
 /// in trailing or leading whitespace the test won't fail and