Elements. Use FormalParameterElementImpl instead of ParameterElementMixin in GenericInferrer.

Change-Id: Ie7cae1eb4c2a5ee81833ac077ce3e14feca52a9a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/437884
Commit-Queue: Konstantin Shcheglov <[email protected]>
Reviewed-by: Paul Berry <[email protected]>

Author: scheglov

pkg/analyzer/lib/src/dart/element/generic_inferrer.dart

@@ -179,7 +179,7 @@ class GenericInferrer {
   /// [argumentTypes].
   void constrainArguments({
     InterfaceFragmentImpl? genericClass,
-    required List<ParameterElementMixin> parameters,
+    required List<FormalParameterElementImpl> parameters,
     required List<TypeImpl> argumentTypes,
     required AstNodeImpl? nodeForTesting,
   }) {
@@ -189,7 +189,7 @@ class GenericInferrer {
       constrainArgument(
         argumentTypes[i],
         parameters[i].type,
-        parameters[i].name2 ?? '',
+        parameters[i].name3 ?? '',
         genericClass: genericClass,
         nodeForTesting: nodeForTesting,
       );

pkg/analyzer/lib/src/dart/resolver/typed_literal_resolver.dart

@@ -512,15 +512,12 @@ class TypedLiteralResolver {
     // Also use upwards information to infer the type.
     List<TypeImpl> elementTypes =
         node.elements.map(_computeElementType).toList();
-    var syntheticParameter = FormalParameterFragmentImpl.synthetic(
+    var syntheticParameter = FormalParameterElementImpl.synthetic(
       'element',
       genericElementType,
       ParameterKind.POSITIONAL,
     );
-    List<ParameterElementMixin> parameters = List.filled(
-      elementTypes.length,
-      syntheticParameter,
-    );
+    var parameters = List.filled(elementTypes.length, syntheticParameter);
     if (_strictInference &&
         parameters.isEmpty &&
         contextType is UnknownInferredType) {
@@ -835,18 +832,18 @@ class TypedLiteralResolver {
       nullabilitySuffix: NullabilitySuffix.none,
     );
 
-    var parameters = <ParameterElementMixin>[];
+    var parameters = <FormalParameterElementImpl>[];
     var argumentTypes = <TypeImpl>[];
     for (var i = 0; i < inferredTypes.length; i++) {
       parameters.add(
-        FormalParameterFragmentImpl.synthetic(
+        FormalParameterElementImpl.synthetic(
           'key',
           genericKeyType,
           ParameterKind.POSITIONAL,
         ),
       );
       parameters.add(
-        FormalParameterFragmentImpl.synthetic(
+        FormalParameterElementImpl.synthetic(
           'value',
           genericValueType,
           ParameterKind.POSITIONAL,
@@ -894,11 +891,11 @@ class TypedLiteralResolver {
       nullabilitySuffix: NullabilitySuffix.none,
     );
 
-    var parameters = <ParameterElementMixin>[];
+    var parameters = <FormalParameterElementImpl>[];
     var argumentTypes = <TypeImpl>[];
     for (var i = 0; i < inferredTypes.length; i++) {
       parameters.add(
-        FormalParameterFragmentImpl.synthetic(
+        FormalParameterElementImpl.synthetic(
           'element',
           genericElementType,
           ParameterKind.POSITIONAL,