[cfe] Allow typed super parameters

Part of #47525

Closes #47741
Closes #48444
Closes #47951

Change-Id: If9aadd996414df5091fc667a7202aafa9a0213db
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/233889
Reviewed-by: Johnni Winther <[email protected]>
Commit-Queue: Chloe Stefantsova <[email protected]>

Author: chloestefantsova

pkg/_fe_analyzer_shared/lib/src/parser/parser_impl.dart

@@ -6895,7 +6895,7 @@ class Parser {
         typeInfo.couldBeExpression) {
       assert(optional('?', token));
       assert(next.isKeywordOrIdentifier);
-      if (!next.isIdentifier) {
+      if (!looksLikeName(next)) {
         reportRecoverableError(
             next, codes.templateExpectedIdentifier.withArguments(next));
         next = rewriter.insertSyntheticIdentifier(next);

pkg/_fe_analyzer_shared/lib/src/parser/type_info.dart

@@ -252,17 +252,6 @@ TypeInfo computeType(final Token token, bool required,
   assert(typeParamOrArg == noTypeParamOrArg);
   next = next.next!;
 
-  // TODO(scheglov) This is a hack to partially fix.
-  // https://github.com/dart-lang/sdk/issues/47951
-  if (optional('?', next) &&
-      optional('super', next.next!) &&
-      optional('.', next.next!.next!)) {
-    return simpleNullableType;
-  }
-  if (optional('super', next) && optional('.', next.next!)) {
-    return simpleType;
-  }
-
   if (optional('.', next)) {
     next = next.next!;
     if (isValidTypeReference(next)) {

pkg/_fe_analyzer_shared/lib/src/parser/type_info_impl.dart

@@ -451,6 +451,7 @@ class VoidType implements TypeInfo {
 bool looksLikeName(Token token) {
   return token.kind == IDENTIFIER_TOKEN ||
       optional('this', token) ||
+      optional('super', token) ||
       (token.isIdentifier &&
           // Although `typedef` is a legal identifier,
           // type `typedef` identifier is not legal and in this situation
@@ -794,7 +795,9 @@ class ComplexTypeInfo implements TypeInfo {
         if (optional('?', next)) {
           next = next.next!;
         }
-        if (!(next.isIdentifier || optional('this', next))) {
+        if (!(next.isIdentifier ||
+            optional('this', next) ||
+            optional('super', next))) {
           break; // `Function` used as the name in a function declaration.
         }
       }

pkg/analyzer/test/generated/nnbd_parser_test.dart

@@ -235,9 +235,9 @@ main() {
     parseCompilationUnit(r'+t{{r?this}}', errors: [
       expectedError(ParserErrorCode.EXPECTED_EXECUTABLE, 0, 1),
       expectedError(ParserErrorCode.MISSING_FUNCTION_PARAMETERS, 1, 1),
-      expectedError(ParserErrorCode.MISSING_IDENTIFIER, 6, 4),
       expectedError(ParserErrorCode.EXPECTED_TOKEN, 6, 4),
       expectedError(ParserErrorCode.EXPECTED_TOKEN, 10, 1),
+      expectedError(ParserErrorCode.MISSING_IDENTIFIER, 10, 1),
     ]);
   }
 

pkg/front_end/parser_testcases/error_recovery/keyword_named_class_fields.dart.intertwined.expect

@@ -1471,28 +1471,27 @@ parseUnit(class)
                 listener: beginMetadataStar(int)
                 listener: endMetadataStar(0)
               listener: beginMember()
-              isReservedKeyword(super)
-              indicatesMethodOrField(=)
-              parseFields(;, null, null, null, null, null, null, ;, Instance of 'SimpleType', super, DeclarationKind.Class, WrapperClass, true)
-                listener: beginFields(DeclarationKind.Class, null, null, null, null, null, null, ;)
-                listener: handleIdentifier(int, typeReference)
-                listener: handleNoTypeArguments(super)
-                listener: handleType(int, null)
-                ensureIdentifierPotentiallyRecovered(int, fieldDeclaration, true)
-                  reportRecoverableErrorWithToken(super, Instance of 'Template<(Token) => Message>')
-                    listener: handleRecoverableError(Message[ExpectedIdentifierButGotKeyword, 'super' can't be used as an identifier because it's a keyword., Try renaming this to be an identifier that isn't a keyword., {lexeme: super}], super, super)
-                  listener: handleIdentifier(super, fieldDeclaration)
-                parseFieldInitializerOpt(super, super, null, null, null, null, DeclarationKind.Class, WrapperClass)
-                  listener: beginFieldInitializer(=)
-                  parseExpression(=)
-                    parsePrecedenceExpression(=, 1, true)
-                      parseUnaryExpression(=, true)
-                        parsePrimary(=, expression)
-                          parseLiteralInt(=)
-                            listener: handleLiteralInt(42)
-                  listener: endFieldInitializer(=, ;)
-                listener: endClassFields(null, null, null, null, null, null, 1, int, ;)
-              listener: endMember()
+              recoverFromInvalidMember(int, ;, null, null, null, null, null, null, ;, Instance of 'SimpleType', null, DeclarationKind.Class, WrapperClass)
+                parseFields(;, null, null, null, null, null, null, ;, Instance of 'SimpleType', super, DeclarationKind.Class, WrapperClass, false)
+                  listener: beginFields(DeclarationKind.Class, null, null, null, null, null, null, ;)
+                  listener: handleIdentifier(int, typeReference)
+                  listener: handleNoTypeArguments(super)
+                  listener: handleType(int, null)
+                  ensureIdentifierPotentiallyRecovered(int, fieldDeclaration, false)
+                    reportRecoverableErrorWithToken(super, Instance of 'Template<(Token) => Message>')
+                      listener: handleRecoverableError(Message[ExpectedIdentifierButGotKeyword, 'super' can't be used as an identifier because it's a keyword., Try renaming this to be an identifier that isn't a keyword., {lexeme: super}], super, super)
+                    listener: handleIdentifier(super, fieldDeclaration)
+                  parseFieldInitializerOpt(super, super, null, null, null, null, DeclarationKind.Class, WrapperClass)
+                    listener: beginFieldInitializer(=)
+                    parseExpression(=)
+                      parsePrecedenceExpression(=, 1, true)
+                        parseUnaryExpression(=, true)
+                          parsePrimary(=, expression)
+                            parseLiteralInt(=)
+                              listener: handleLiteralInt(42)
+                    listener: endFieldInitializer(=, ;)
+                  listener: endClassFields(null, null, null, null, null, null, 1, int, ;)
+                listener: endMember()
             notEofOrValue(}, int)
             parseClassOrMixinOrExtensionOrEnumMemberImpl(;, DeclarationKind.Class, WrapperClass)
               parseMetadataStar(;)

pkg/front_end/parser_testcases/error_recovery/keyword_named_class_methods.dart.expect

@@ -308,6 +308,14 @@ parser/error_recovery/keyword_named_class_methods:282:7: 'super' can't be used a
   int super(int x) {
       ^^^^^
 
+parser/error_recovery/keyword_named_class_methods:282:7: Expected ';' after this.
+  int super(int x) {
+      ^^^^^
+
+parser/error_recovery/keyword_named_class_methods:282:12: Expected an identifier, but got '('.
+  int super(int x) {
+           ^
+
 parser/error_recovery/keyword_named_class_methods:287:7: 'switch' can't be used as an identifier because it's a keyword.
   int switch(int x) {
       ^^^^^^
@@ -3883,12 +3891,23 @@ beginCompilationUnit(class)
         beginMetadataStar(int)
         endMetadataStar(0)
         beginMember()
-          beginMethod(DeclarationKind.Class, null, null, null, null, null, super)
+          beginFields(DeclarationKind.Class, null, null, null, null, null, null, })
             handleIdentifier(int, typeReference)
             handleNoTypeArguments(super)
             handleType(int, null)
             handleRecoverableError(Message[ExpectedIdentifierButGotKeyword, 'super' can't be used as an identifier because it's a keyword., Try renaming this to be an identifier that isn't a keyword., {lexeme: super}], super, super)
-            handleIdentifier(super, methodDeclaration)
+            handleIdentifier(super, fieldDeclaration)
+            handleNoFieldInitializer(()
+            handleRecoverableError(Message[ExpectedAfterButGot, Expected ';' after this., null, {string: ;}], super, super)
+          endClassFields(null, null, null, null, null, null, 1, int, ;)
+        endMember()
+        beginMetadataStar(()
+        endMetadataStar(0)
+        beginMember()
+          beginMethod(DeclarationKind.Class, null, null, null, null, null, ()
+            handleNoType(;)
+            handleRecoverableError(Message[ExpectedIdentifier, Expected an identifier, but got '('., Try inserting an identifier before '('., {lexeme: (}], (, ()
+            handleIdentifier(, methodDeclaration)
             handleNoTypeVariables(()
             beginFormalParameters((, MemberKind.NonStaticMethod)
               beginMetadataStar(int)
@@ -3937,7 +3956,7 @@ beginCompilationUnit(class)
                 endBinaryExpression(+)
               endReturnStatement(true, return, ;)
             endBlockFunctionBody(2, {, })
-          endClassMethod(null, int, (, null, })
+          endClassMethod(null, , (, null, })
         endMember()
         beginMetadataStar(int)
         endMetadataStar(0)
@@ -4743,7 +4762,7 @@ beginCompilationUnit(class)
             endBlockFunctionBody(2, {, })
           endClassMethod(null, int, (, null, })
         endMember()
-      endClassOrMixinOrExtensionBody(DeclarationKind.Class, 70, {, })
+      endClassOrMixinOrExtensionBody(DeclarationKind.Class, 71, {, })
     endClassDeclaration(class, })
   endTopLevelDeclaration()
 endCompilationUnit(1, )