| // Copyright (c) 2021, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| import 'package:analyzer/dart/element/type.dart'; |
| import 'package:analyzer/src/dart/ast/ast.dart'; |
| import 'package:analyzer/src/dart/resolver/invocation_inferrer.dart'; |
| import 'package:analyzer/src/generated/resolver.dart'; |
| |
| /// A resolver for [InstanceCreationExpression] nodes. |
| /// |
| /// This resolver is responsible for rewriting a given |
| /// [InstanceCreationExpression] as a [MethodInvocation] if the parsed |
| /// [ConstructorName]'s `type` resolves to a [FunctionReference] or |
| /// [ConstructorReference], instead of a [NamedType]. |
| class InstanceCreationExpressionResolver { |
| /// The resolver driving this participant. |
| final ResolverVisitor _resolver; |
| |
| InstanceCreationExpressionResolver(this._resolver); |
| |
| void resolve(InstanceCreationExpressionImpl node, |
| {required DartType contextType}) { |
| // The parser can parse certain code as [InstanceCreationExpression] when it |
| // might be an invocation of a method on a [FunctionReference] or |
| // [ConstructorReference]. In such a case, it is this resolver's |
| // responsibility to rewrite. For example, given: |
| // |
| // a.m<int>.apply(); |
| // |
| // the parser will give an InstanceCreationExpression (`a.m<int>.apply()`) |
| // with a name of `a.m<int>.apply` (ConstructorName) with a type of |
| // `a.m<int>` (TypeName with a name of `a.m` (PrefixedIdentifier) and |
| // typeArguments of `<int>`) and a name of `apply` (SimpleIdentifier). If |
| // `a.m<int>` is actually a function reference, then the |
| // InstanceCreationExpression needs to be rewritten as a MethodInvocation |
| // with a target of `a.m<int>` (a FunctionReference) and a name of `apply`. |
| if (node.keyword == null) { |
| var typeNameTypeArguments = node.constructorName.type.typeArguments; |
| if (typeNameTypeArguments != null) { |
| // This could be a method call on a function reference or a constructor |
| // reference. |
| _resolveWithTypeNameWithTypeArguments(node, typeNameTypeArguments, |
| contextType: contextType); |
| return; |
| } |
| } |
| |
| _resolveInstanceCreationExpression(node, contextType: contextType); |
| } |
| |
| void _resolveInstanceCreationExpression(InstanceCreationExpressionImpl node, |
| {required DartType contextType}) { |
| var whyNotPromotedList = <WhyNotPromotedGetter>[]; |
| var constructorName = node.constructorName; |
| constructorName.accept(_resolver); |
| // Re-assign constructorName in case the node got replaced. |
| constructorName = node.constructorName; |
| _resolver.elementResolver.visitInstanceCreationExpression(node); |
| var elementToInfer = _resolver.inferenceHelper.constructorElementToInfer( |
| constructorName: constructorName, |
| definingLibrary: _resolver.definingLibrary, |
| ); |
| InstanceCreationInferrer( |
| resolver: _resolver, |
| node: node, |
| argumentList: node.argumentList, |
| contextType: contextType, |
| whyNotPromotedList: whyNotPromotedList) |
| .resolveInvocation(rawType: elementToInfer?.asType); |
| node.recordStaticType(node.constructorName.type.type!, resolver: _resolver); |
| _resolver.checkForArgumentTypesNotAssignableInList( |
| node.argumentList, whyNotPromotedList); |
| } |
| |
| /// Resolve [node] which has a [NamedType] with type arguments (given as |
| /// [typeNameTypeArguments]). |
| /// |
| /// The instance creation expression may actually be a method call on a |
| /// type-instantiated function reference or constructor reference. |
| void _resolveWithTypeNameWithTypeArguments( |
| InstanceCreationExpressionImpl node, |
| TypeArgumentListImpl typeNameTypeArguments, |
| {required DartType contextType}) { |
| // TODO(srawlins): Lookup the name and potentially rewrite `node` as a |
| // [MethodInvocation]. |
| _resolveInstanceCreationExpression(node, contextType: contextType); |
| } |
| } |