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Remove unnecessary getContainingClass calls (#26753)

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Andy 2018-08-29 17:43:22 -07:00 committed by GitHub
parent cea49dfb0d
commit d37caf1c0d
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2 changed files with 8 additions and 7 deletions
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13
src/compiler/checker.ts
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@ -27344,12 +27344,10 @@ namespace ts {
}
if (isPartOfTypeNode(node)) {
let typeFromTypeNode = getTypeFromTypeNode(<TypeNode>node);
const typeFromTypeNode = getTypeFromTypeNode(<TypeNode>node);
if (isExpressionWithTypeArgumentsInClassImplementsClause(node)) {
const containingClass = getContainingClass(node)!;
const classType = getTypeOfNode(containingClass) as InterfaceType;
typeFromTypeNode = getTypeWithThisArgument(typeFromTypeNode, classType.thisType);
return getTypeWithThisArgument(typeFromTypeNode, getTypeOfClassContainingHeritageClause(node).thisType);
}
return typeFromTypeNode;
@ -27362,8 +27360,7 @@ namespace ts {
if (isExpressionWithTypeArgumentsInClassExtendsClause(node)) {
// A SyntaxKind.ExpressionWithTypeArguments is considered a type node, except when it occurs in the
// extends clause of a class. We handle that case here.
const classNode = getContainingClass(node)!;
const classType = getDeclaredTypeOfSymbol(getSymbolOfNode(classNode)) as InterfaceType;
const classType = getTypeOfClassContainingHeritageClause(node);
const baseType = firstOrUndefined(getBaseTypes(classType));
return baseType ? getTypeWithThisArgument(baseType, classType.thisType) : errorType;
}
@ -27405,6 +27402,10 @@ namespace ts {
return errorType;
}
function getTypeOfClassContainingHeritageClause(node: ExpressionWithTypeArguments): InterfaceType {
return getDeclaredTypeOfClassOrInterface(getSymbolOfNode(node.parent.parent));
}
// Gets the type of object literal or array literal of destructuring assignment.
// { a } from
// for ( { a } of elems) {

2
src/compiler/utilities.ts
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@ -3743,7 +3743,7 @@ namespace ts {
return false;
}
export function isExpressionWithTypeArgumentsInClassExtendsClause(node: Node): boolean {
export function isExpressionWithTypeArgumentsInClassExtendsClause(node: Node): node is ExpressionWithTypeArguments {
return tryGetClassExtendingExpressionWithTypeArguments(node) !== undefined;
}