Add SemanticDeclVisitor.

pkg/compiler/lib/src/resolution/send_resolver.dart

 // Copyright (c) 2015, 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.
 
 part of dart2js.semantics_visitor;
 
 enum SendStructureKind {
   GET,
   SET,
   INVOKE,
@@ skipping 447 matching lines @@
     Element element = elements[node.send];
     Selector selector = elements.getSelector(node.send);
     DartType type = elements.getType(node);
 
     ConstructorAccessSemantics constructorAccessSemantics =
         computeConstructorAccessSemantics(element, type);
     return new NewInvokeStructure(constructorAccessSemantics, selector);
   }
 }
 
+abstract class DeclStructure<R, A> {
+  final FunctionElement element;
+
+  DeclStructure(this.element);
+
+  /// Calls the matching visit method on [visitor] with [node] and [arg].
+  R dispatch(SemanticDeclVisitor<R, A> visitor,
+             FunctionExpression node,
+             A arg);
+}
+
+enum ConstructorKind {
+  GENERATIVE,
+  REDIRECTING_GENERATIVE,
+  FACTORY,
+  REDIRECTING_FACTORY,
+}
+
+class ConstructorDeclStructure<R, A> extends DeclStructure<R, A> {
+  final ConstructorKind kind;
+
+  ConstructorDeclStructure(this.kind, ConstructorElement constructor)
+      : super(constructor);
+
+  R dispatch(SemanticDeclVisitor<R, A> visitor,
+             FunctionExpression node,
+             A arg) {
+    switch (kind) {
+      case ConstructorKind.GENERATIVE:
+        return visitor.visitGenerativeConstructorDecl(
+            node, element, node.parameters, node.initializers, node.body, arg);
+      case ConstructorKind.REDIRECTING_GENERATIVE:
+        return visitor.visitRedirectingGenerativeConstructorDecl(
+            node, element, node.parameters, node.initializers, arg);
+      case ConstructorKind.FACTORY:
+        return visitor.visitFactoryConstructorDecl(
+            node, element, node.parameters, node.body, arg);
+      default:
+        break;
+    }
+    throw new SpannableAssertionFailure(node,
+        "Unhandled constructor declaration kind: ${kind}");
+  }
+}
+
+class RedirectingFactoryConstructorDeclStructure<R, A>
+    extends DeclStructure<R, A> {
+  InterfaceType redirectionTargetType;
+  ConstructorElement redirectionTarget;
+
+  RedirectingFactoryConstructorDeclStructure(
+      ConstructorElement constructor,
+      this.redirectionTargetType,
+      this.redirectionTarget)
+      : super(constructor);
+
+  R dispatch(SemanticDeclVisitor<R, A> visitor,
+             FunctionExpression node,
+             A arg) {
+    return visitor.visitRedirectingFactoryConstructorDecl(
+        node, element, node.parameters,
+        redirectionTargetType, redirectionTarget, arg);
+  }
+}
+
+enum FunctionKind {
+  TOP_LEVEL_GETTER,
+  TOP_LEVEL_SETTER,
+  TOP_LEVEL_FUNCTION,
+  STATIC_GETTER,
+  STATIC_SETTER,
+  STATIC_FUNCTION,
+  ABSTRACT_GETTER,
+  ABSTRACT_SETTER,
+  ABSTRACT_METHOD,
+  INSTANCE_GETTER,
+  INSTANCE_SETTER,
+  INSTANCE_METHOD,
+  LOCAL_FUNCTION,
+  CLOSURE,
+}
+
+class FunctionDeclStructure<R, A>
+    extends DeclStructure<R, A> {
+  final FunctionKind kind;
+
+  FunctionDeclStructure(this.kind, FunctionElement function)
+      : super(function);
+
+  R dispatch(SemanticDeclVisitor<R, A> visitor,
+             FunctionExpression node,
+             A arg) {
+    switch (kind) {
+      case FunctionKind.TOP_LEVEL_GETTER:
+        return visitor.visitTopLevelGetterDecl(
+            node, element, node.body, arg);
+      case FunctionKind.TOP_LEVEL_SETTER:
+        return visitor.visitTopLevelSetterDecl(
+            node, element, node.parameters, node.body, arg);
+      case FunctionKind.TOP_LEVEL_FUNCTION:
+        return visitor.visitTopLevelFunctionDecl(
+            node, element, node.parameters, node.body, arg);
+      case FunctionKind.STATIC_GETTER:
+        return visitor.visitStaticGetterDecl(
+            node, element, node.body, arg);
+      case FunctionKind.STATIC_SETTER:
+        return visitor.visitStaticSetterDecl(
+            node, element, node.parameters, node.body, arg);
+      case FunctionKind.STATIC_FUNCTION:
+        return visitor.visitStaticFunctionDecl(
+            node, element, node.parameters, node.body, arg);
+      case FunctionKind.ABSTRACT_GETTER:
+        return visitor.visitAbstractGetterDecl(
+            node, element, arg);
+      case FunctionKind.ABSTRACT_SETTER:
+        return visitor.visitAbstractSetterDecl(
+            node, element, node.parameters, arg);
+      case FunctionKind.ABSTRACT_METHOD:
+        return visitor.visitAbstractMethodDecl(
+            node, element, node.parameters, arg);
+      case FunctionKind.INSTANCE_GETTER:
+        return visitor.visitInstanceGetterDecl(
+            node, element, node.body, arg);
+      case FunctionKind.INSTANCE_SETTER:
+        return visitor.visitInstanceSetterDecl(
+            node, element, node.parameters, node.body, arg);
+      case FunctionKind.INSTANCE_METHOD:
+        return visitor.visitInstanceMethodDecl(
+            node, element, node.parameters, node.body, arg);
+      case FunctionKind.LOCAL_FUNCTION:
+        return visitor.visitLocalFunctionDecl(
+            node, element, node.parameters, node.body, arg);
+      case FunctionKind.CLOSURE:
+        return visitor.visitClosureDecl(
+            node, element, node.parameters, node.body, arg);
+    }
+  }
+}
+
+abstract class DeclResolverMixin {
+  TreeElements get elements;
+
+  internalError(Spannable spannable, String message);
+
+  ConstructorKind computeConstructorKind(ConstructorElement constructor) {
+    if (constructor.isRedirectingFactory) {
+      return ConstructorKind.REDIRECTING_FACTORY;
+    } else if (constructor.isFactoryConstructor) {
+      return ConstructorKind.FACTORY;
+    } else if (constructor.isRedirectingGenerative) {
+      return ConstructorKind.REDIRECTING_GENERATIVE;
+    } else {
+      return ConstructorKind.GENERATIVE;
+    }
+  }
+
+  DeclStructure computeFunctionStructure(FunctionExpression node) {
+    FunctionElement element = elements.getFunctionDefinition(node);
+    if (element.isConstructor) {
+      ConstructorElement constructor = element;
+      ConstructorKind kind = computeConstructorKind(constructor);
+      if (kind == ConstructorKind.REDIRECTING_FACTORY) {
+        return new RedirectingFactoryConstructorDeclStructure(
+            constructor,
+            elements.getType(node.body),
+            constructor.immediateRedirectionTarget);
+      } else {
+        return new ConstructorDeclStructure(kind, element);
+      }
+    } else {
+      FunctionKind kind;
+      if (element.isLocal) {
+        if (element.name.isEmpty) {
+          kind = FunctionKind.CLOSURE;
+        } else {
+          kind = FunctionKind.LOCAL_FUNCTION;
+        }
+      } else if (element.isInstanceMember) {
+        if (element.isGetter) {
+          kind = element.isAbstract
+              ? FunctionKind.ABSTRACT_GETTER
+              : FunctionKind.INSTANCE_GETTER;
+        } else if (element.isSetter) {
+          kind = element.isAbstract
+              ? FunctionKind.ABSTRACT_SETTER
+              : FunctionKind.INSTANCE_SETTER;
+        } else {
+          kind = element.isAbstract
+              ? FunctionKind.ABSTRACT_METHOD
+              : FunctionKind.INSTANCE_METHOD;
+        }
+      } else if (element.isStatic) {
+        if (element.isGetter) {
+          kind = FunctionKind.STATIC_GETTER;
+        } else if (element.isSetter) {
+          kind = FunctionKind.STATIC_SETTER;
+        } else {
+          kind = FunctionKind.STATIC_FUNCTION;
+        }
+      } else if (element.isTopLevel) {
+        if (element.isGetter) {
+          kind = FunctionKind.TOP_LEVEL_GETTER;
+        } else if (element.isSetter) {
+          kind = FunctionKind.TOP_LEVEL_SETTER;
+        } else {
+          kind = FunctionKind.TOP_LEVEL_FUNCTION;
+        }
+      } else {
+        return internalError(node, "Unhandled function expression.");
+      }
+      return new FunctionDeclStructure(kind, element);
+    }
+  }
+
+  InitializerStructure computeInitializerStructure(Send node) {
+    Element element = elements[node];
+    if (node.asSendSet() != null) {
+      return new FieldInitializerStructure(element);
+    } else if (Initializers.isConstructorRedirect(node)) {
+      return new ThisConstructorInvokeStructure(
+          element, elements.getSelector(node));
+    } else if (Initializers.isSuperConstructorCall(node)) {
+      return new SuperConstructorInvokeStructure(
+          element,
+          elements.analyzedElement.enclosingClass.supertype,
+          elements.getSelector(node));
+    }
+    return internalError(node, "Unhandled initializer.");
+  }
+
+  void computeParameterStructures(
+      NodeList parameters,
+      void callback(VariableDefinitions definitions,
+                    ParameterStructure structure)) {
+    int index = 0;
+    for (Node node in parameters) {
+      NodeList optionalParameters = node.asNodeList();
+      if (optionalParameters != null) {
+        bool isNamed = optionalParameters.beginToken.stringValue == '{';
+        for (Node node in optionalParameters) {
+          callback(node,
+              computeParameterStructure(node, index++,
+                  isRequired: false, isNamed: isNamed));
+        }
+      } else {
+        callback(node, computeParameterStructure(node, index++));
+      }
+    }
+  }
+
+  ParameterStructure computeParameterStructure(
+      VariableDefinitions definitions,
+      int index,
+      {bool isRequired: true, bool isNamed: false}) {
+    Node node = definitions.definitions.nodes.single;
+    ParameterElement element = elements[node];
+    if (element == null) {
+      throw new SpannableAssertionFailure(
+          node, "No parameter structure for $node.");
+    }
+    if (isRequired) {
+      return new RequiredParameterStructure(node, element, index);
+    } else {
+      ConstantExpression defaultValue;
+      if (element.initializer != null) {
+        defaultValue = elements.getConstant(element.initializer);
+      }
+      if (isNamed) {
+        return new NamedParameterStructure(node, element, defaultValue);
+      } else {
+        return new OptionalParameterStructure(
+            node, element, defaultValue, index);
+      }
+    }
+  }
+
+  void computeVariableStructures(
+      VariableDefinitions definitions,
+      void callback(Node node, VariableStructure structure)) {
+    for (Node node in definitions.definitions) {
+       callback(definitions, computeVariableStructure(node));
+    }
+  }
+
+  VariableStructure computeVariableStructure(Node node) {
+    VariableElement element = elements[node];
+    VariableKind kind;
+    if (element.isLocal) {
+      kind = VariableKind.LOCAL_VARIABLE;
+    } else if (element.isInstanceMember) {
+      kind = VariableKind.INSTANCE_FIELD;
+    } else if (element.isStatic) {
+      kind = VariableKind.STATIC_FIELD;
+    } else if (element.isTopLevel) {
+      kind = VariableKind.TOP_LEVEL_FIELD;
+    } else {
+      return internalError(node, "Unexpected variable $element.");
+    }
+    if (element.isConst) {
+      ConstantExpression constant = elements.getConstant(element.initializer);
+      return new ConstantVariableStructure(kind, node, element, constant);
+    } else {
+      return new NonConstantVariableStructure(kind, node, element);
+    }
+  }
+}