diff --git a/ets2panda/checker/ets/helpers.cpp b/ets2panda/checker/ets/helpers.cpp
index 553abd66e2047e601d4e4440b62db65fc8eadec5..10a0cfd60ab75fc7fb4d1d03094a096b8cd0236e 100644
--- a/ets2panda/checker/ets/helpers.cpp
+++ b/ets2panda/checker/ets/helpers.cpp
@@ -99,11 +99,13 @@ void ETSChecker::WrongContextErrorClassifyByType(ir::Identifier *ident)
          varbinder::VariableFlags::TYPE))) {
         case varbinder::VariableFlags::CLASS:
             identCategoryName = "Class";
-            break;
+            LogError(diagnostic::NOT_AS_OBJECT, {identCategoryName}, ident->Start());
+            return;
 
         case varbinder::VariableFlags::NAMESPACE:
             identCategoryName = "Namespace";
-            break;
+            LogError(diagnostic::NOT_AS_OBJECT, {identCategoryName}, ident->Start());
+            return;
 
         case varbinder::VariableFlags::METHOD:
             identCategoryName = "Function";
diff --git a/ets2panda/parser/ETSparser.cpp b/ets2panda/parser/ETSparser.cpp
index 2a7ea152f1d0c42814411b6665fbd1e30fd2b4d0..09542e5e65f4bd1247a6289e08c7f10b3aaeb614 100644
--- a/ets2panda/parser/ETSparser.cpp
+++ b/ets2panda/parser/ETSparser.cpp
@@ -1630,6 +1630,16 @@ bool ETSParser::IsFixedArrayTypeNode(ir::AstNode *node)
 
 ir::Expression *ETSParser::ParseFunctionParameter()
 {
+    switch (Lexer()->GetToken().Type()) {
+        case lexer::TokenType::KEYW_PRIVATE:
+        case lexer::TokenType::KEYW_PUBLIC:
+        case lexer::TokenType::KEYW_PROTECTED:
+            LogError(diagnostic::FIELD_IN_PARAM);
+            Lexer()->NextToken();
+        default:
+            break;
+    }
+
     if (Lexer()->GetToken().Type() == lexer::TokenType::PUNCTUATOR_AT) {
         return ParseFunctionParameterAnnotations();
     }
diff --git a/ets2panda/parser/ETSparserExpressions.cpp b/ets2panda/parser/ETSparserExpressions.cpp
index 7a0cb42540017e338534f2b12a247320c7db9296..bff2cbec61e8ca9a642255a35da2c38a699fa4e7 100644
--- a/ets2panda/parser/ETSparserExpressions.cpp
+++ b/ets2panda/parser/ETSparserExpressions.cpp
@@ -359,9 +359,13 @@ ir::Expression *ETSParser::ParsePrimaryExpression(ExpressionParseFlags flags)
         }
         case lexer::TokenType::KEYW_TYPE: {
             LogError(diagnostic::TYPE_ALIAS_ONLY_TOP_LEVEL);
-            const auto &rangeToken = Lexer()->GetToken().Loc();
             ParseTypeAliasDeclaration();  // Try to parse type alias and drop the result.
-            return AllocBrokenExpression(rangeToken);
+            return AllocBrokenExpression(Lexer()->GetToken().Loc());
+        }
+        case lexer::TokenType::KEYW_FUNCTION: {
+            LogError(diagnostic::FUNC_EXPR);
+            ParseFunctionDeclaration(true, ir::ModifierFlags::NONE);
+            return AllocBrokenExpression(Lexer()->GetToken().Loc());
         }
         case lexer::TokenType::PUNCTUATOR_FORMAT: {
             return ParseExpressionFormatPlaceholder();
diff --git a/ets2panda/parser/parserImpl.cpp b/ets2panda/parser/parserImpl.cpp
index ade0b8337b5d866c72581b70a5723e2543e37930..4f66296e627555da3127cf70f15b71aedd5f342d 100644
--- a/ets2panda/parser/parserImpl.cpp
+++ b/ets2panda/parser/parserImpl.cpp
@@ -1267,6 +1267,11 @@ ir::Identifier *ParserImpl::ExpectIdentifier([[maybe_unused]] bool isReference,
         if ((options & TypeAnnotationParsingOptions::REPORT_ERROR) == 0) {
             return nullptr;
         }
+        if (token.IsLiteral()) {
+            LogError(diagnostic::LITERAL_VALUE_IDENT, {token.ToString()}, tokenStart);
+        } else if (token.IsKeyword()) {
+            LogError(diagnostic::HARD_KEYWORD_IDENT, {token.ToString()}, tokenStart);
+        }
         LogError(diagnostic::IDENTIFIER_EXPECTED_HERE, {TokenToString(tokenType)}, tokenStart);
         lexer_->NextToken();
         return AllocBrokenExpression(tokenStart);
diff --git a/ets2panda/test/ast/compiler/ets/FixedArray/tuple_types_9_neg.ets b/ets2panda/test/ast/compiler/ets/FixedArray/tuple_types_9_neg.ets
index 978f7ce86d5fdc1bfd4b0808bf27313bc64853ab..baddef4e13b7be0894b3837afa1b74bfe705e61c 100644
--- a/ets2panda/test/ast/compiler/ets/FixedArray/tuple_types_9_neg.ets
+++ b/ets2panda/test/ast/compiler/ets/FixedArray/tuple_types_9_neg.ets
@@ -24,6 +24,6 @@ function main(): void {
 /* @@? 18:40 Error SyntaxError: Unexpected token, expected ',' or ']'. */
 /* @@? 18:40 Error SyntaxError: Unexpected token '>'. */
 /* @@? 18:43 Error SyntaxError: Unexpected token 'Int'. */
-/* @@? 18:43 Error TypeError: Class name 'Int' used in the wrong context */
+/* @@? 18:43 Error SyntaxError: Class cannot be used as object. */
 /* @@? 18:43 Error TypeError: Bad operand type, the types of the operands must be numeric, same enumeration, or boolean type. */
 /* @@? 18:47 Error SyntaxError: Unexpected token ']'. */
diff --git a/ets2panda/test/ast/compiler/ets/import_tests/import_chain_with_errors/import_1.ets b/ets2panda/test/ast/compiler/ets/import_tests/import_chain_with_errors/import_1.ets
index 22afeef200aa350613a29be5b9773a7fbae0e044..fbf91a5f6d272d0dcd6f0843c43bd9be41dab74e 100644
--- a/ets2panda/test/ast/compiler/ets/import_tests/import_chain_with_errors/import_1.ets
+++ b/ets2panda/test/ast/compiler/ets/import_tests/import_chain_with_errors/import_1.ets
@@ -26,6 +26,7 @@ let 1: number
 // First level import with both types of error
 /* @@? import_1.ets:21:17 Error TypeError: Type 'Int' cannot be assigned to type 'String' */
 /* @@? import_1.ets:24:5 Error SyntaxError: Identifier expected, got 'number literal'. */
+/* @@? import_1.ets:24:5 Error SyntaxError: Number, string or computed value property name '1' is not allowed, use classes to access data by property names that are identifiers */
 
 // Second level import import with both types of error
 /* @@? import_2.ets:17:17 Error TypeError: Type 'Int' cannot be assigned to type 'String' */
diff --git a/ets2panda/test/ast/compiler/ets/import_tests/import_chain_with_errors/master_file.ets b/ets2panda/test/ast/compiler/ets/import_tests/import_chain_with_errors/master_file.ets
index fd416a1cde80ffd6742865bda47925955662a0ff..c7b79fc31dc88b8dd9c755538d3f57985f899b0f 100644
--- a/ets2panda/test/ast/compiler/ets/import_tests/import_chain_with_errors/master_file.ets
+++ b/ets2panda/test/ast/compiler/ets/import_tests/import_chain_with_errors/master_file.ets
@@ -20,6 +20,7 @@ let b = new B(10);
 // First level import with both types of error
 /* @@? import_1.ets:21:17 Error TypeError: Type 'Int' cannot be assigned to type 'String' */
 /* @@? import_1.ets:24:5 Error SyntaxError: Identifier expected, got 'number literal'. */
+/* @@? import_1.ets:24:5 Error SyntaxError: Number, string or computed value property name '1' is not allowed, use classes to access data by property names that are identifiers */
 
 // Second level import import with both types of error
 /* @@? import_2.ets:17:17 Error TypeError: Type 'Int' cannot be assigned to type 'String' */
diff --git a/ets2panda/test/ast/compiler/ets/invalid_two_functions.ets b/ets2panda/test/ast/compiler/ets/invalid_two_functions.ets
index 62d52f75f5cb2155a2d76209841e60a88aca9c41..f4850751e54e1f9d72894560bd436e6a932569d9 100644
--- a/ets2panda/test/ast/compiler/ets/invalid_two_functions.ets
+++ b/ets2panda/test/ast/compiler/ets/invalid_two_functions.ets
@@ -20,5 +20,6 @@ const b = a.map(function (e) {
     return e * 2;
 });
 
-/* @@? 16:2 Error SyntaxError: Unexpected token 'function'. */
-/* @@? 19:17 Error SyntaxError: Unexpected token 'function'. */
+/* @@? 16:2 Error SyntaxError: Function expressions are not supported, use arrow functions instead */
+/* @@? 19:17 Error SyntaxError: Function expressions are not supported, use arrow functions instead */
+/* @@? 19:28 Error SyntaxError: Parameter declaration should have an explicit type annotation. */
diff --git a/ets2panda/test/ast/compiler/ets/math_const_as_identifier.ets b/ets2panda/test/ast/compiler/ets/math_const_as_identifier.ets
index 731f743e07e8ff1b9e3f6cbc36eee4dfb10be4d5..ef222fcc9f772058479b15c4bb03e777c2d78d67 100644
--- a/ets2panda/test/ast/compiler/ets/math_const_as_identifier.ets
+++ b/ets2panda/test/ast/compiler/ets/math_const_as_identifier.ets
@@ -26,5 +26,6 @@ function foo1() {
 /* @@? 21:9 Error TypeError: Variable 'NaN' has already been declared. */
 /* @@? 22:9 Error TypeError: Variable 'Infinity' has already been declared. */
 /* @@? 22:20 Error TypeError: Unresolved reference test */
+/* @@? 23:9 Error SyntaxError: Hard keyword 'undefined' cannot be used as identifier */
 /* @@? 23:9 Error SyntaxError: Identifier expected, got 'undefined'. */
 /* @@? 24:1 Error SyntaxError: Variable must be initialized or it's type must be declared. */
diff --git a/ets2panda/test/ast/compiler/ets/namespace_tests/namespace_as_type11.ets b/ets2panda/test/ast/compiler/ets/namespace_tests/namespace_as_type11.ets
index b9f5b38405f8671f4c91af084fa7f3298efd7396..eb120df6c800b66d7b563804f51d40b13b6b4ec7 100644
--- a/ets2panda/test/ast/compiler/ets/namespace_tests/namespace_as_type11.ets
+++ b/ets2panda/test/ast/compiler/ets/namespace_tests/namespace_as_type11.ets
@@ -18,4 +18,4 @@ namespace MySpace {
 
 let a = /* @@ label */MySpace
 
-/* @@@ label Error TypeError: Namespace name 'MySpace' used in the wrong context */
+/* @@@ label Error SyntaxError: Namespace cannot be used as object. */
diff --git a/ets2panda/test/ast/compiler/ets/static_index_function1.ets b/ets2panda/test/ast/compiler/ets/static_index_function1.ets
index a341c997c9b417632509952ffa3a6ed8e389b954..36c1a7ebd551ea117a3c9dfddb806c4a3aad9ba0 100644
--- a/ets2panda/test/ast/compiler/ets/static_index_function1.ets
+++ b/ets2panda/test/ast/compiler/ets/static_index_function1.ets
@@ -29,5 +29,5 @@ function main() {
 
 /* @@@ label Error TypeError: '$_get' is a static property of 'A' */
 /* @@@ label1 Error TypeError: '$_get' is a static property of 'A' */
-/* @@@ label2 Error TypeError: Class name 'A' used in the wrong context */
+/* @@@ label2 Error SyntaxError: Class cannot be used as object. */
 /* @@@ label3 Error TypeError: '$_get' is a static property of 'A' */
diff --git a/ets2panda/test/ast/compiler/ets/static_index_function2.ets b/ets2panda/test/ast/compiler/ets/static_index_function2.ets
index 9659ccec5293ce7a09fafb82e05ed1dff5c5231c..c6ae1e214f8ca52e2e8482918f9a36c7aea8f192 100644
--- a/ets2panda/test/ast/compiler/ets/static_index_function2.ets
+++ b/ets2panda/test/ast/compiler/ets/static_index_function2.ets
@@ -27,5 +27,5 @@ function main(): int {
 }
 
 /* @@@ label Error TypeError: '$_set' is a static property of 'A' */
-/* @@@ label1 Error TypeError: Class name 'A' used in the wrong context */
+/* @@@ label1 Error SyntaxError: Class cannot be used as object. */
 /* @@@ label2 Error TypeError: '$_set' is a static property of 'A' */
diff --git a/ets2panda/test/ast/compiler/ets/type_error_processing/not_constructible_types.ets b/ets2panda/test/ast/compiler/ets/type_error_processing/not_constructible_types.ets
index 05eb89b3ebd56f196cad0dda0f033f5582055905..4341a3928cf2a97ebbc724a072faf3bf72b0f1bc 100644
--- a/ets2panda/test/ast/compiler/ets/type_error_processing/not_constructible_types.ets
+++ b/ets2panda/test/ast/compiler/ets/type_error_processing/not_constructible_types.ets
@@ -35,5 +35,5 @@ WeakSet [12] = new undefined()
 /* @@? 20:1 Error TypeError: This expression is not constructible. */
 /* @@? 23:1 Error TypeError: The union type is not constructible. */
 /* @@? 26:1 Error TypeError: Indexed signatures are not allowed. Use arrays instead! */
-/* @@? 26:1 Error TypeError: Class name 'WeakSet' used in the wrong context */
+/* @@? 26:1 Error SyntaxError: Class cannot be used as object. */
 /* @@? 26:16 Error TypeError: Type 'undefined' is not constructible. */
diff --git a/ets2panda/test/ast/parser/ets/FixedArray/MultipleParserErrors.ets b/ets2panda/test/ast/parser/ets/FixedArray/MultipleParserErrors.ets
index eead0041009ec11fcdf07db40a84b435c7a8afd2..bfd2a41f7ce970122601da20883d86c0f4cf65ea 100644
--- a/ets2panda/test/ast/parser/ets/FixedArray/MultipleParserErrors.ets
+++ b/ets2panda/test/ast/parser/ets/FixedArray/MultipleParserErrors.ets
@@ -275,10 +275,13 @@ function main(): void {
 /* @@? 157:16 Error TypeError: A is abstract therefore cannot be instantiated. */
 /* @@? 158:26 Error TypeError: Property 'getInner' does not exist on type 'A' */
 /* @@? 161:9 Error SyntaxError: Identifier expected, got 'let'. */
+/* @@? 161:9 Error SyntaxError: Hard keyword 'let' cannot be used as identifier */
+/* @@? 162:9 Error SyntaxError: Hard keyword 'const' cannot be used as identifier */
 /* @@? 162:9 Error SyntaxError: Identifier expected, got 'const'. */
 /* @@? 163:9 Error SyntaxError: Identifier expected, got 'new'. */
+/* @@? 163:9 Error SyntaxError: Hard keyword 'new' cannot be used as identifier */
 /* @@? 164:5 Error TypeError: This expression is not callable. */
 /* @@? 165:5 Error TypeError: This expression is not callable. */
 /* @@? 166:5 Error TypeError: Expected 1 arguments, got 0. */
 /* @@? 166:5 Error TypeError: No matching call signature */
-/* @@? 285:1 Error SyntaxError: Expected '}', got 'end of stream'. */
+/* @@? 288:1 Error SyntaxError: Expected '}', got 'end of stream'. */
diff --git a/ets2panda/test/ast/parser/ets/InvalidParserImpl.ets b/ets2panda/test/ast/parser/ets/InvalidParserImpl.ets
index f1a1bac9355051e04eba42620f38d97b2d736581..feca6d13fffc6c08f84198aede31717936a7c022 100644
--- a/ets2panda/test/ast/parser/ets/InvalidParserImpl.ets
+++ b/ets2panda/test/ast/parser/ets/InvalidParserImpl.ets
@@ -26,4 +26,5 @@ class int {}
 /* @@? 18:5 Error SyntaxError: Getter must not have formal parameters. */
 /* @@? 19:1 Error SyntaxError: Setter must have exactly one formal parameter. */
 /* @@? 23:7 Error SyntaxError: Cannot be used as user-defined type. */
+/* @@? 23:7 Error SyntaxError: Hard keyword 'int' cannot be used as identifier */
 /* @@? 23:7 Error SyntaxError: Identifier expected, got 'int'. */
diff --git a/ets2panda/test/ast/parser/ets/MultipleClassErrors.ets b/ets2panda/test/ast/parser/ets/MultipleClassErrors.ets
index 216d6b70d7b2dee478c3ec8277c041f4640c888f..2eca08c7dc33c5f4079a4225bb99c53eb59c3b70 100644
--- a/ets2panda/test/ast/parser/ets/MultipleClassErrors.ets
+++ b/ets2panda/test/ast/parser/ets/MultipleClassErrors.ets
@@ -33,7 +33,8 @@ class /* @@ label4 */{/* @@ label5 */}
 /* @@? 21:20 Error SyntaxError: Unexpected token 'let'. */
 /* @@? 22:20 Error SyntaxError: Unexpected token 'let'. */
 /* @@? 24:17 Error TypeError: Type '"abc"' cannot be assigned to type 'Double' */
+/* @@? 28:22 Error SyntaxError: Number, string or computed value property name '77' is not allowed, use classes to access data by property names that are identifiers */
 /* @@? 28:22 Error SyntaxError: Identifier expected, got 'number literal'. */
 /* @@? 30:22 Error SyntaxError: Identifier expected, got '{'. */
 /* @@? 30:38 Error SyntaxError: Expected '{', got '}'. */
-/* @@? 40:1 Error SyntaxError: Expected '}', got 'end of stream'. */
+/* @@? 41:1 Error SyntaxError: Expected '}', got 'end of stream'. */
diff --git a/ets2panda/test/ast/parser/ets/MultipleParserErrors.ets b/ets2panda/test/ast/parser/ets/MultipleParserErrors.ets
index 9358e02dd9d825070607791c55111ab1dbad8b73..f90392bf9397c420ff47cec0efefe2482686bb13 100644
--- a/ets2panda/test/ast/parser/ets/MultipleParserErrors.ets
+++ b/ets2panda/test/ast/parser/ets/MultipleParserErrors.ets
@@ -273,10 +273,13 @@ function main(): void {
 /* @@? 157:16 Error TypeError: A is abstract therefore cannot be instantiated. */
 /* @@? 158:26 Error TypeError: Property 'getInner' does not exist on type 'A' */
 /* @@? 161:9 Error SyntaxError: Identifier expected, got 'let'. */
+/* @@? 161:9 Error SyntaxError: Hard keyword 'let' cannot be used as identifier */
+/* @@? 162:9 Error SyntaxError: Hard keyword 'const' cannot be used as identifier */
 /* @@? 162:9 Error SyntaxError: Identifier expected, got 'const'. */
+/* @@? 163:9 Error SyntaxError: Hard keyword 'new' cannot be used as identifier */
 /* @@? 163:9 Error SyntaxError: Identifier expected, got 'new'. */
 /* @@? 164:5 Error TypeError: This expression is not callable. */
 /* @@? 165:5 Error TypeError: This expression is not callable. */
 /* @@? 166:5 Error TypeError: Expected 1 arguments, got 0. */
 /* @@? 166:5 Error TypeError: No matching call signature */
-/* @@? 283:1 Error SyntaxError: Expected '}', got 'end of stream'. */
+/* @@? 286:1 Error SyntaxError: Expected '}', got 'end of stream'. */
diff --git a/ets2panda/test/ast/parser/ets/annotations_tests/annotationDecl_bad_initializer01.ets b/ets2panda/test/ast/parser/ets/annotations_tests/annotationDecl_bad_initializer01.ets
index c91e54e8e1546c2aa440ca29bec14288070dc0b2..1c44ded6935e22953442f74a0911854b7eed7949 100644
--- a/ets2panda/test/ast/parser/ets/annotations_tests/annotationDecl_bad_initializer01.ets
+++ b/ets2panda/test/ast/parser/ets/annotations_tests/annotationDecl_bad_initializer01.ets
@@ -20,6 +20,6 @@ class A{}
 }
 
 
-/* @@@ label Error TypeError: Class name 'A' used in the wrong context */
+/* @@@ label Error SyntaxError: Class cannot be used as object. */
 /* @@@ label Error TypeError: Type 'A' cannot be assigned to type 'String' */
 /* @@@ label Error TypeError: Invalid value for annotation field, expected a constant literal. */
diff --git a/ets2panda/test/ast/parser/ets/annotations_tests/annotationDecl_with_innerclass.ets b/ets2panda/test/ast/parser/ets/annotations_tests/annotationDecl_with_innerclass.ets
index 79ef906623e292c7f02b97ce1b33d93ca70c8cf0..02ed066c23bdfeb9d4be5ee5db49ca8d92d3b83f 100644
--- a/ets2panda/test/ast/parser/ets/annotations_tests/annotationDecl_with_innerclass.ets
+++ b/ets2panda/test/ast/parser/ets/annotations_tests/annotationDecl_with_innerclass.ets
@@ -17,6 +17,7 @@
     class A{}
 }
 
+/* @@? 17:5 Error SyntaxError: Hard keyword 'class' cannot be used as identifier */
 /* @@? 17:5 Error SyntaxError: Identifier expected, got 'class'. */
 /* @@? 17:12 Error SyntaxError: Missing type annotation for property 'A'. */
 /* @@? 17:12 Error SyntaxError: Identifier expected, got '{'. */
diff --git a/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param01.ets b/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param01.ets
index 291e9fc476b02b5d03e0c415a0f5c32b63d79253..2fb3feaa785b30cd97c365acd222dcee03a80d01 100644
--- a/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param01.ets
+++ b/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param01.ets
@@ -23,6 +23,6 @@ class A{}
 class B{}
 
 
-/* @@@ label Error TypeError: Class name 'A' used in the wrong context */
+/* @@@ label Error SyntaxError: Class cannot be used as object. */
 /* @@@ label Error TypeError: Type 'A' cannot be assigned to type 'String' */
 /* @@@ label Error TypeError: Invalid value for annotation field, expected a constant literal. */
diff --git a/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_classproperty.ets b/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_classproperty.ets
index 6bda66d08940770a04e4aba7da07a38063a7dfc2..389af848c79f2620d8032f0262f11c897692c21a 100644
--- a/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_classproperty.ets
+++ b/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_classproperty.ets
@@ -28,9 +28,9 @@ class B{
 }
 
 
-/* @@@ label1 Error TypeError: Class name 'A' used in the wrong context */
+/* @@@ label1 Error SyntaxError: Class cannot be used as object. */
 /* @@@ label1 Error TypeError: Type 'A' cannot be assigned to type 'String'  */
 /* @@@ label1 Error TypeError: Invalid value for annotation field, expected a constant literal.  */
-/* @@@ label2 Error TypeError: Class name 'A' used in the wrong context */
+/* @@@ label2 Error SyntaxError: Class cannot be used as object. */
 /* @@@ label2 Error TypeError: Type 'A' cannot be assigned to type 'String'  */
 /* @@@ label2 Error TypeError: Invalid value for annotation field, expected a constant literal.  */
diff --git a/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_function_param.ets b/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_function_param.ets
index 4b9930aa0d222eb5214dcade67a4db552f1c4cfc..cf347df6c7611ddf4a4c5bcee21246e4c4e21a2f 100644
--- a/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_function_param.ets
+++ b/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_function_param.ets
@@ -23,6 +23,6 @@ class A{}
 function foo(@MyAnno({testProperty1: /* @@ label */A}) x: int) {
 }
 
-/* @@@ label Error TypeError: Class name 'A' used in the wrong context  */
+/* @@@ label Error SyntaxError: Class cannot be used as object.  */
 /* @@@ label Error TypeError: Type 'A' cannot be assigned to type 'String'  */
 /* @@@ label Error TypeError: Invalid value for annotation field, expected a constant literal.  */
diff --git a/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_global_variable_decl.ets b/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_global_variable_decl.ets
index 42cc5b89bb8b5bda80e4639bcdcd232d948fed20..535b365f32749b2966664b57af09b1d91fa69913 100644
--- a/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_global_variable_decl.ets
+++ b/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_global_variable_decl.ets
@@ -24,6 +24,6 @@ class A{}
 let x = "abc"
 
 
-/* @@@ label Error TypeError: Class name 'A' used in the wrong context  */
+/* @@@ label Error SyntaxError: Class cannot be used as object.  */
 /* @@@ label Error TypeError: Type 'A' cannot be assigned to type 'String'  */
 /* @@@ label Error TypeError: Invalid value for annotation field, expected a constant literal.  */
diff --git a/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_interface.ets b/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_interface.ets
index b05a133e46f00d369cb474906c343f83d30a8e32..d544f882f733615ca8a40d5147dca8378cbd237b 100644
--- a/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_interface.ets
+++ b/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_interface.ets
@@ -25,6 +25,6 @@ interface itf {
     foo() : string
 }
 
-/* @@@ label Error TypeError: Class name 'A' used in the wrong context */
+/* @@@ label Error SyntaxError: Class cannot be used as object. */
 /* @@@ label Error TypeError: Type 'A' cannot be assigned to type 'String' */
 /* @@@ label Error TypeError: Invalid value for annotation field, expected a constant literal. */
diff --git a/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_interfacemethod.ets b/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_interfacemethod.ets
index 1dc2531c2f20d0531331bbd39a205d2dc142b6a7..ae609bf8f8e979ea73aa697849a7690cbb5ea1d7 100644
--- a/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_interfacemethod.ets
+++ b/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_interfacemethod.ets
@@ -25,6 +25,6 @@ interface itf {
 }
 
 
-/* @@@ label Error TypeError: Class name 'A' used in the wrong context */
+/* @@@ label Error SyntaxError: Class cannot be used as object. */
 /* @@@ label Error TypeError: Type 'A' cannot be assigned to type 'String' */
 /* @@@ label Error TypeError: Invalid value for annotation field, expected a constant literal. */
diff --git a/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_interfaceproperty.ets b/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_interfaceproperty.ets
index 87ea5db60576f9067c9ff478d31f58bff3a0cd47..4ce655dabf0b46248667309f22d432a25226c175 100644
--- a/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_interfaceproperty.ets
+++ b/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_interfaceproperty.ets
@@ -25,6 +25,6 @@ interface itf {
 }
 
 
-/* @@@ label Error TypeError: Class name 'A' used in the wrong context */
+/* @@@ label Error SyntaxError: Class cannot be used as object. */
 /* @@@ label Error TypeError: Type 'A' cannot be assigned to type 'String' */
 /* @@@ label Error TypeError: Invalid value for annotation field, expected a constant literal. */
diff --git a/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_local_variable_decl.ets b/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_local_variable_decl.ets
index bcb548094fdb7a8e0199987cbb6fc293ef37d14f..9c65ff8922fa6cfa80a0326c5990a7912e1a0b45 100644
--- a/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_local_variable_decl.ets
+++ b/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_local_variable_decl.ets
@@ -26,6 +26,6 @@ function main():void {
 }
 
 
-/* @@@ label Error TypeError: Class name 'A' used in the wrong context */
+/* @@@ label Error SyntaxError: Class cannot be used as object. */
 /* @@@ label Error TypeError: Type 'A' cannot be assigned to type 'String'  */
 /* @@@ label Error TypeError: Invalid value for annotation field, expected a constant literal.  */
diff --git a/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_type_alias.ets b/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_type_alias.ets
index 20828eff75c8e3514fe48652e3652bc4cb590e23..9eb2aa1f063285fe0409101e42c3faf7059a6d43 100644
--- a/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_type_alias.ets
+++ b/ets2panda/test/ast/parser/ets/annotations_tests/annotationUsage_bad_param_for_type_alias.ets
@@ -29,9 +29,9 @@ function main(): void {
 }
 
 
-/* @@@ label1 Error TypeError: Class name 'A' used in the wrong context */
+/* @@@ label1 Error SyntaxError: Class cannot be used as object. */
 /* @@@ label1 Error TypeError: Type 'A' cannot be assigned to type 'String'  */
 /* @@@ label1 Error TypeError: Invalid value for annotation field, expected a constant literal.  */
-/* @@@ label2 Error TypeError: Class name 'A' used in the wrong context */
+/* @@@ label2 Error SyntaxError: Class cannot be used as object. */
 /* @@@ label2 Error TypeError: Type 'A' cannot be assigned to type 'String'  */
 /* @@@ label2 Error TypeError: Invalid value for annotation field, expected a constant literal.  */
diff --git a/ets2panda/test/ast/parser/ets/async_function_bad.ets b/ets2panda/test/ast/parser/ets/async_function_bad.ets
index 6b628497f9291e4a57ff00c489c763c7a5fbf594..b55c2ffaf805c847953bbbdc5b6a313d38d8bde5 100644
--- a/ets2panda/test/ast/parser/ets/async_function_bad.ets
+++ b/ets2panda/test/ast/parser/ets/async_function_bad.ets
@@ -25,4 +25,4 @@ async native function foo(): Promise;
 /* @@? 16:27 Error SyntaxError: Unexpected token ')'. */
 /* @@? 16:28 Error SyntaxError: Unexpected token, expected ')'. */
 /* @@? 16:30 Error SyntaxError: Unexpected token 'Promise'. */
-/* @@? 16:30 Error TypeError: Class name 'Promise' used in the wrong context */
+/* @@? 16:30 Error SyntaxError: Class cannot be used as object. */
diff --git a/ets2panda/test/ast/parser/ets/decl_in_param.ets b/ets2panda/test/ast/parser/ets/decl_in_param.ets
new file mode 100644
index 0000000000000000000000000000000000000000..39e7ac9b8f22cb6f5796d6ff0e57cd8a085c4823
--- /dev/null
+++ b/ets2panda/test/ast/parser/ets/decl_in_param.ets
@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+function f(public x: number){
+}
+class C{
+    constructor(public m:number) {}
+    m(public x:number) {}
+}
+/* @@? 16:12 Error SyntaxError: Declaring fields in parameter list is not supported */
+/* @@? 19:17 Error SyntaxError: Declaring fields in parameter list is not supported */
+/* @@? 20:7 Error SyntaxError: Declaring fields in parameter list is not supported */
diff --git a/ets2panda/test/ast/parser/ets/empty_array_map_inference_fail.ets b/ets2panda/test/ast/parser/ets/empty_array_map_inference_fail.ets
index 0d648f4ea72508aa1f13ee99f58bafac51877434..e085a3efaffb4ed91f7fcca39ce993d05794b0f6 100644
--- a/ets2panda/test/ast/parser/ets/empty_array_map_inference_fail.ets
+++ b/ets2panda/test/ast/parser/ets/empty_array_map_inference_fail.ets
@@ -21,6 +21,7 @@
   return x+1; 
 });
 
-/* @@? 16:2 Error SyntaxError: Unexpected token 'function'. */
+/* @@? 16:2 Error SyntaxError: Function expressions are not supported, use arrow functions instead */
 /* @@? 20:1 Error TypeError: Can't resolve array type */
-/* @@? 20:8 Error SyntaxError: Unexpected token 'function'. */
+/* @@? 20:8 Error SyntaxError: Function expressions are not supported, use arrow functions instead */
+/* @@? 20:18 Error SyntaxError: Parameter declaration should have an explicit type annotation. */
diff --git a/ets2panda/test/ast/parser/ets/interface_parser_error_1.ets b/ets2panda/test/ast/parser/ets/interface_parser_error_1.ets
index afa196d8f38516aa48a779213330e93a323eb240..05540be90decdb67f05112134428cda9dd1abc45 100644
--- a/ets2panda/test/ast/parser/ets/interface_parser_error_1.ets
+++ b/ets2panda/test/ast/parser/ets/interface_parser_error_1.ets
@@ -59,9 +59,10 @@ function mdin() {    let a = new A();
 /* @@? 26:19 Error SyntaxError: Unexpected token, expected an identifier. */
 /* @@? 27:5 Error SyntaxError: Unexpected token 'A'. */
 /* @@? 27:7 Error SyntaxError: Unexpected token '{'. */
+/* @@? 28:5 Error SyntaxError: Hard keyword 'constructor' cannot be used as identifier */
 /* @@? 28:5 Error SyntaxError: Identifier expected, got 'constructor'. */
 /* @@? 28:19 Error SyntaxError: Annotations are not allowed on this type of declaration. */
 /* @@? 29:18 Error SyntaxError: Unexpected token, expected an identifier. */
 /* @@? 31:2 Error SyntaxError: Unexpected token '*'. */
 /* @@? 32:1 Error SyntaxError: Nested functions are not allowed. */
-/* @@? 68:1 Error SyntaxError: Expected '}', got 'end of stream'. */
+/* @@? 69:1 Error SyntaxError: Expected '}', got 'end of stream'. */
diff --git a/ets2panda/test/ast/parser/ets/overloaded_method_as_value_neg.ets b/ets2panda/test/ast/parser/ets/overloaded_method_as_value_neg.ets
index 2624a849c2912e8b25be517103e94b26e3d1e5c3..1f80043685998b862aae7445b7088d1bb1512c28 100644
--- a/ets2panda/test/ast/parser/ets/overloaded_method_as_value_neg.ets
+++ b/ets2panda/test/ast/parser/ets/overloaded_method_as_value_neg.ets
@@ -13,16 +13,17 @@
  * limitations under the License.
  */
 
-interface"actual  : " + actual.result[i]
+interface"actual : " + actual.result[i]
 
+/* @@? 16:10 Error SyntaxError: Number, string or computed value property name 'actual : ' is not allowed, use classes to access data by property names that are identifiers */
 /* @@? 16:10 Error SyntaxError: Identifier expected, got 'string literal'. */
-/* @@? 16:23 Error SyntaxError: Unexpected token, expected '{'. */
-/* @@? 16:31 Error SyntaxError: Interface fields must have type annotation. */
-/* @@? 16:39 Error SyntaxError: Unexpected token, expected ']'. */
+/* @@? 16:22 Error SyntaxError: Unexpected token, expected '{'. */
+/* @@? 16:30 Error SyntaxError: Interface fields must have type annotation. */
+/* @@? 16:38 Error SyntaxError: Unexpected token, expected ']'. */
+/* @@? 16:38 Error SyntaxError: Unexpected token, expected ','. */
+/* @@? 16:38 Error SyntaxError: Unexpected token, expected 'private' or identifier. */
+/* @@? 16:39 Error SyntaxError: Identifier expected. */
 /* @@? 16:39 Error SyntaxError: Unexpected token, expected ','. */
 /* @@? 16:39 Error SyntaxError: Unexpected token, expected 'private' or identifier. */
-/* @@? 16:40 Error SyntaxError: Identifier expected. */
-/* @@? 16:40 Error SyntaxError: Unexpected token, expected ','. */
-/* @@? 16:40 Error SyntaxError: Unexpected token, expected 'private' or identifier. */
-/* @@? 28:67 Error SyntaxError: Identifier expected. */
-/* @@? 28:67 Error SyntaxError: Unexpected token, expected '}'. */
\ No newline at end of file
+/* @@? 30:1 Error SyntaxError: Identifier expected. */
+/* @@? 30:1 Error SyntaxError: Unexpected token, expected '}'. */
diff --git a/ets2panda/test/ast/parser/ets/type_references.ets b/ets2panda/test/ast/parser/ets/type_references.ets
index b689bb2c97d77d04ebab704d607253525626d531..a5db99d97c59ca2ae43d7fdb141ac2ab237c1c14 100644
--- a/ets2panda/test/ast/parser/ets/type_references.ets
+++ b/ets2panda/test/ast/parser/ets/type_references.ets
@@ -25,7 +25,7 @@ let y: G<{a:String}, B> // Error
 /* @@? 19:10 Error SyntaxError: Unexpected token '>'. */
 /* @@? 19:11 Error SyntaxError: Unexpected token 'a'. */
 /* @@? 19:13 Error SyntaxError: Label must be followed by a loop statement. */
-/* @@? 19:13 Error TypeError: Class name 'String' used in the wrong context */
+/* @@? 19:13 Error SyntaxError: Class cannot be used as object. */
 /* @@? 19:19 Error SyntaxError: Unexpected token '}'. */
 /* @@? 19:20 Error SyntaxError: Unexpected token ','. */
 /* @@? 19:22 Error SyntaxError: Unexpected token 'B'. */
diff --git a/ets2panda/test/ast/parser/ets/unexpected_token_62.ets b/ets2panda/test/ast/parser/ets/unexpected_token_62.ets
index b397c9a783511136231c99cfda73e3cb029b229a..78b6905b98b63eab7f505d42823d74c880bd42c7 100644
--- a/ets2panda/test/ast/parser/ets/unexpected_token_62.ets
+++ b/ets2panda/test/ast/parser/ets/unexpected_token_62.ets
@@ -34,7 +34,7 @@ int = 10
 /* @@? 20:1 Error SyntaxError: Unexpected token, expected an identifier. */
 /* @@? 20:1 Error TypeError: Unresolved reference nt */
 /* @@? 20:10 Error SyntaxError: Unexpected token 'A'. */
-/* @@? 20:10 Error TypeError: Class name 'A' used in the wrong context */
+/* @@? 20:10 Error SyntaxError: Class cannot be used as object. */
 /* @@? 20:12 Error SyntaxError: Unexpected token '{'. */
 /* @@? 22:11 Error SyntaxError: Unexpected token 'Nu'. */
 /* @@? 23:1 Error SyntaxError: Unexpected token, expected an identifier. */
@@ -48,7 +48,7 @@ int = 10
 /* @@? 24:21 Error SyntaxError: Label must be followed by a loop statement. */
 /* @@? 24:21 Error TypeError: Unresolved reference s */
 /* @@? 24:23 Error SyntaxError: Unexpected token 'A'. */
-/* @@? 24:23 Error TypeError: Class name 'A' used in the wrong context */
+/* @@? 24:23 Error SyntaxError: Class cannot be used as object. */
 /* @@? 24:25 Error SyntaxError: Unexpected token '{'. */
 /* @@? 25:1 Error SyntaxError: Unexpected token 'int'. */
 /* @@? 26:1 Error SyntaxError: Unexpected token ')'. */
diff --git a/ets2panda/test/ast/parser/ets/user_defined_5.ets b/ets2panda/test/ast/parser/ets/user_defined_5.ets
index bdf44a3c52233139d5dfcb3a16e90824bcb0b80b..54076098618908af969d791ce536c4b67d49c011 100644
--- a/ets2panda/test/ast/parser/ets/user_defined_5.ets
+++ b/ets2panda/test/ast/parser/ets/user_defined_5.ets
@@ -19,3 +19,4 @@ enum /* @@ label */double {
 
 /* @@@ label Error SyntaxError: Cannot be used as user-defined type. */
 /* @@@ label Error SyntaxError: Identifier expected, got 'double'. */
+/* @@@ label Error SyntaxError: Hard keyword 'double' cannot be used as identifier */
diff --git a/ets2panda/test/ast/parser/ets/user_defined_7.ets b/ets2panda/test/ast/parser/ets/user_defined_7.ets
index 67c6eec0952f3d56ce21ecaac8914f1f39d2f4bc..587457df03a00716aa658dc94de604c15c31a1a7 100644
--- a/ets2panda/test/ast/parser/ets/user_defined_7.ets
+++ b/ets2panda/test/ast/parser/ets/user_defined_7.ets
@@ -19,6 +19,7 @@ interface /* @@ label1 */double {
 
 /* @@@ label1 Error SyntaxError: Cannot be used as user-defined type. */
 /* @@@ label1 Error SyntaxError: Identifier expected, got 'double'. */
+/* @@@ label1 Error SyntaxError: Hard keyword 'double' cannot be used as identifier */
 /* @@@ label2 Error SyntaxError: Interface member initialization is prohibited. */
 /* @@@ label3 Error SyntaxError: Unexpected token, expected ','. */
 /* @@? 17:51 Error SyntaxError: Unexpected token, expected 'private' or identifier. */
diff --git a/ets2panda/test/ast/parser/ets/wrong_context_class_1.ets b/ets2panda/test/ast/parser/ets/wrong_context_class_1.ets
index ecd46879d0e0c80712a7af51636e30c79b3fa44d..76848aae0f9f83e4668fcc2fda5156914f68e2d2 100644
--- a/ets2panda/test/ast/parser/ets/wrong_context_class_1.ets
+++ b/ets2panda/test/ast/parser/ets/wrong_context_class_1.ets
@@ -22,5 +22,5 @@ function main()
     /* @@ label */a = /* @@ label1 */5
 }
 
-/* @@@ label Error TypeError: Class name 'a' used in the wrong context */
+/* @@@ label Error SyntaxError: Class cannot be used as object. */
 /* @@@ label1 Error TypeError: Type 'Int' cannot be assigned to type 'a' */
diff --git a/ets2panda/test/ast/parser/ets/wrong_context_class_2.ets b/ets2panda/test/ast/parser/ets/wrong_context_class_2.ets
index c0f2c427e82dccb6483392f2109d4bd7cfb81132..f26cb6dee62a19595f38e4a39a61b61ad9fc41ee 100644
--- a/ets2panda/test/ast/parser/ets/wrong_context_class_2.ets
+++ b/ets2panda/test/ast/parser/ets/wrong_context_class_2.ets
@@ -23,5 +23,5 @@ function main()
     b = a
 }
 
-/* @@? 23:9 Error TypeError: Class name 'a' used in the wrong context */
+/* @@? 23:9 Error SyntaxError: Class cannot be used as object. */
 /* @@? 23:9 Error TypeError: Type 'a' cannot be assigned to type 'Int' */
diff --git a/ets2panda/test/ast/parser/ets/wrong_context_class_3.ets b/ets2panda/test/ast/parser/ets/wrong_context_class_3.ets
index d0818058f7509ad8b2de829024f7ae2cccc7cad0..6b54667d9f58ff7fa9839619ce1637c9924a6597 100644
--- a/ets2panda/test/ast/parser/ets/wrong_context_class_3.ets
+++ b/ets2panda/test/ast/parser/ets/wrong_context_class_3.ets
@@ -22,5 +22,5 @@ function main()
     a++
 }
 
-/* @@? 22:5 Error TypeError: Class name 'a' used in the wrong context  */
+/* @@? 22:5 Error SyntaxError: Class cannot be used as object.  */
 /* @@? 22:5 Error TypeError: Bad operand type, the type of the operand must be numeric type.  */
diff --git a/ets2panda/test/ast/parser/ets/wrong_context_class_4.ets b/ets2panda/test/ast/parser/ets/wrong_context_class_4.ets
index 3af604d858f5423baff2ed5b652ef0c2496a4b0f..531f3707e9d4884f12e13970a64c909b609d5960 100644
--- a/ets2panda/test/ast/parser/ets/wrong_context_class_4.ets
+++ b/ets2panda/test/ast/parser/ets/wrong_context_class_4.ets
@@ -27,4 +27,4 @@ function main()
 }
 
 /* @@? 26:5 Error TypeError: Indexed signatures are not allowed. Use arrays instead!  */
-/* @@? 26:5 Error TypeError: Class name 'a' used in the wrong context  */
+/* @@? 26:5 Error SyntaxError: Class cannot be used as object.  */
diff --git a/ets2panda/test/ast/parser/js/this-expression.js b/ets2panda/test/ast/parser/js/this-expression.js
index c0245f85315fa3eaad75d2a01c0434bf306f0ce9..884e65196010ee62a126622aa5a4316a560c97f8 100644
--- a/ets2panda/test/ast/parser/js/this-expression.js
+++ b/ets2panda/test/ast/parser/js/this-expression.js
@@ -17,3 +17,4 @@
 this./* @@ label */"foo";
 
 /* @@@ label Error SyntaxError: Identifier expected, got 'string literal'. */
+/* @@@ label Error SyntaxError: Number, string or computed value property name 'foo' is not allowed, use classes to access data by property names that are identifiers */
diff --git a/ets2panda/test/ast/parser/ts/test-interface2.ts b/ets2panda/test/ast/parser/ts/test-interface2.ts
index 95377c99273b38af756a61dbb8f5904b22bb978e..9e3c4b26f6c39782c30d55d4bed86f79ddad8026 100644
--- a/ets2panda/test/ast/parser/ts/test-interface2.ts
+++ b/ets2panda/test/ast/parser/ts/test-interface2.ts
@@ -16,3 +16,4 @@
 
 interface /* @@ label */5 { }
 /* @@@ label Error SyntaxError: Identifier expected, got 'number literal'. */
+/* @@@ label Error SyntaxError: Number, string or computed value property name '5' is not allowed, use classes to access data by property names that are identifiers */
diff --git a/ets2panda/test/compiler/ets/abstractNewClassInstanceExpression-expected.txt b/ets2panda/test/compiler/ets/abstractNewClassInstanceExpression-expected.txt
index 7d401ea3ae94487adc738e9d9b80f5ca88cadc5a..c9fa2adc08312d33da3ddeba3ff9f15566567d19 100644
--- a/ets2panda/test/compiler/ets/abstractNewClassInstanceExpression-expected.txt
+++ b/ets2panda/test/compiler/ets/abstractNewClassInstanceExpression-expected.txt
@@ -1297,6 +1297,6 @@ TypeError: A is abstract therefore cannot be instantiated. [abstractNewClassInst
 SyntaxError: Unexpected token '{'. [abstractNewClassInstanceExpression.ets:26:22]
 TypeError: Method foo(): void in B not overriding any method [abstractNewClassInstanceExpression.ets:27:21]
 SyntaxError: Label must be followed by a loop statement. [abstractNewClassInstanceExpression.ets:32:11]
-TypeError: Class name 'H' used in the wrong context [abstractNewClassInstanceExpression.ets:32:11]
+SyntaxError: Class cannot be used as object. [abstractNewClassInstanceExpression.ets:32:11]
 SyntaxError: Unexpected token '{'. [abstractNewClassInstanceExpression.ets:32:23]
 SyntaxError: Unexpected token '}'. [abstractNewClassInstanceExpression.ets:35:1]
diff --git a/ets2panda/util/diagnostic/syntax.yaml b/ets2panda/util/diagnostic/syntax.yaml
index 8a1a9bafa9cc0a3418103f5191e12558fdcde633..fef5d62ff27ad612df4680c0c147b50164cb8958 100644
--- a/ets2panda/util/diagnostic/syntax.yaml
+++ b/ets2panda/util/diagnostic/syntax.yaml
@@ -1267,3 +1267,23 @@ syntax:
 - name: GENERATOR_FUNCTION
   id: 314
   message: "Generator functions are not supported, please use async/await mechanism for multitasking"
+
+- name: LITERAL_VALUE_IDENT
+  id: 315
+  message: "Number, string or computed value property name '{}' is not allowed, use classes to access data by property names that are identifiers"
+
+- name: HARD_KEYWORD_IDENT
+  id: 316
+  message: "Hard keyword '{}' cannot be used as identifier"
+
+- name: NOT_AS_OBJECT
+  id: 318
+  message: "{} cannot be used as object."
+
+- name: FIELD_IN_PARAM
+  id: 319
+  message: "Declaring fields in parameter list is not supported"
+
+- name: FUNC_EXPR
+  id: 320
+  message: "Function expressions are not supported, use arrow functions instead"