Correct range of struct SynExpr.AnonRecd. (#14715)

Author: nojaf

src/Compiler/pars.fsy

@@ -4904,10 +4904,11 @@ objExprInterface:
 
 braceBarExpr:
   | STRUCT braceBarExprCore
-      { $2 true }
+      { let mStruct = rhs parseState 1
+        $2 (Some mStruct) }
 
   | braceBarExprCore
-      { $1 false }
+      { $1 None }
 
 braceBarExprCore:
   | LBRACE_BAR recdExprCore bar_rbrace
@@ -4918,7 +4919,9 @@ braceBarExprCore:
              | SynExprRecordField((SynLongIdent([id], _, _), _), mEquals, None, _) -> Some (id, mEquals, arbExpr("anonField", id.idRange)) 
              | _ -> reportParseErrorAt (rhs parseState 1) (FSComp.SR.parsInvalidAnonRecdType()); None) 
        let m = rhs2 parseState 1 3
-       (fun isStruct -> SynExpr.AnonRecd (isStruct, orig, flds, m)) }
+       (fun (mStruct: range option) -> 
+            let m = match mStruct with | None -> m | Some mStruct -> unionRanges mStruct m
+            SynExpr.AnonRecd (mStruct.IsSome, orig, flds, m)) }
 
   | LBRACE_BAR recdExprCore recover 
      { reportParseErrorAt (rhs parseState 1) (FSComp.SR.parsUnmatchedBraceBar())  
@@ -4929,21 +4932,29 @@ braceBarExprCore:
              | SynExprRecordField((SynLongIdent([id], _, _), _), mEquals, None, _) -> Some (id, mEquals, arbExpr("anonField", id.idRange)) 
              | _ -> reportParseErrorAt (rhs parseState 1) (FSComp.SR.parsInvalidAnonRecdType()); None) 
        let m = rhs2 parseState 1 2
-       (fun isStruct -> SynExpr.AnonRecd (isStruct, orig, flds, m)) }
+       (fun (mStruct: range option) -> 
+           let m = match mStruct with | None -> m | Some mStruct -> unionRanges mStruct m
+           SynExpr.AnonRecd (mStruct.IsSome, orig, flds, m)) }
 
   | LBRACE_BAR error bar_rbrace
      { // silent recovery 
        let m = rhs2 parseState 1 3
-       (fun _ -> arbExpr("braceBarExpr", m)) }  
+       (fun (mStruct: range option) -> 
+           let m = match mStruct with | None -> m | Some mStruct -> unionRanges mStruct m
+           arbExpr("braceBarExpr", m)) }  
 
   | LBRACE_BAR recover
      { reportParseErrorAt (rhs parseState 1) (FSComp.SR.parsUnmatchedBraceBar())  
        let m = rhs2 parseState 1 1
-       (fun isStruct -> SynExpr.AnonRecd (isStruct, None, [], m)) }
+       (fun (mStruct: range option) -> 
+           let m = match mStruct with | None -> m | Some mStruct -> unionRanges mStruct m
+           SynExpr.AnonRecd (mStruct.IsSome, None, [], m)) }
 
   | LBRACE_BAR bar_rbrace 
      { let m = rhs2 parseState 1 2
-       (fun isStruct -> SynExpr.AnonRecd (isStruct, None, [], m)) }
+       (fun (mStruct: range option) -> 
+           let m = match mStruct with | None -> m | Some mStruct -> unionRanges mStruct m
+           SynExpr.AnonRecd (mStruct.IsSome, None, [], m)) }
 
 anonLambdaExpr: 
   | FUN atomicPatterns RARROW typedSequentialExprBlock 

tests/service/SyntaxTreeTests/ExpressionTests.fs

@@ -494,3 +494,25 @@ type CFoo() =
         assertRange (7,4) (7, 67) m
     | _ -> Assert.Fail $"Could not get valid AST, got {ast}"
 
+[<Test>]
+let ``SynExpr.AnonRecd with struct keyword`` () =
+    let ast =
+        getParseResults """
+struct 
+    {| Foo =
+    //  meh
+    someValue |}
+
+struct {| |}
+"""
+
+    match ast with
+    | ParsedInput.ImplFile(ParsedImplFileInput(contents = [
+                SynModuleOrNamespace.SynModuleOrNamespace(decls = [
+                    SynModuleDecl.Expr(expr = SynExpr.AnonRecd(range = m1))
+                    SynModuleDecl.Expr(expr = SynExpr.AnonRecd(range = m2))
+                ])
+            ])) ->
+        assertRange (2,0) (5, 16) m1
+        assertRange (7, 0) (7, 12) m2
+    | _ -> Assert.Fail $"Could not get valid AST, got {ast}"