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Create a TypeDefiningElement interface.

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This interface is common to ClassElement, FunctionTypeAliasElement,
and the element for the pseudo-type "dynamic".  This should allow us
to avoid some unnecessary casting in the dev_compiler (see
https://codereview.chromium.org/1160223006/#msg11).

R=brianwilkerson@google.com

Review URL: https://codereview.chromium.org//1165213002
This commit is contained in:
Paul Berry 2015-06-08 11:29:02 -07:00
parent 12696cafe9
commit 2c533ac971
1 changed files with 16 additions and 12 deletions
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28
pkg/analyzer/lib/src/generated/element.dart
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@ -128,7 +128,7 @@ class CircularTypeImpl extends DynamicTypeImpl {
/**
* An element that represents a class.
*/
abstract class ClassElement implements Element {
abstract class ClassElement implements TypeDefiningElement {
/**
* An empty list of class elements.
*/
@ -265,9 +265,7 @@ abstract class ClassElement implements Element {
*/
InterfaceType get supertype;
/**
* Return the type defined by the class.
*/
@override
InterfaceType get type;
/**
@ -2154,16 +2152,14 @@ class DefaultParameterElementImpl extends ParameterElementImpl
/**
* The synthetic element representing the declaration of the type `dynamic`.
*/
class DynamicElementImpl extends ElementImpl {
class DynamicElementImpl extends ElementImpl implements TypeDefiningElement {
/**
* Return the unique instance of this class.
*/
static DynamicElementImpl get instance =>
DynamicTypeImpl.instance.element as DynamicElementImpl;
/**
* The type defined by this element.
*/
@override
DynamicTypeImpl type;
/**
@ -4371,7 +4367,7 @@ abstract class FunctionType implements ParameterizedType {
/**
* A function type alias (`typedef`).
*/
abstract class FunctionTypeAliasElement implements Element {
abstract class FunctionTypeAliasElement implements TypeDefiningElement {
/**
* An empty array of type alias elements.
*/
@ -4394,9 +4390,7 @@ abstract class FunctionTypeAliasElement implements Element {
*/
DartType get returnType;
/**
* Return the type of function defined by this type alias.
*/
@override
FunctionType get type;
/**
@ -9623,6 +9617,16 @@ class TopLevelVariableElementImpl extends PropertyInducingElementImpl
getNodeMatching((node) => node is VariableDeclaration);
}
/**
* An element that defines a type.
*/
abstract class TypeDefiningElement implements Element {
/**
* Return the type defined by this element.
*/
DartType get type;
}
/**
* The abstract class `TypeImpl` implements the behavior common to objects
* representing the declared type of elements in the element model.