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42 lines
2.3 KiB
TypeScript
42 lines
2.3 KiB
TypeScript
import { surroundingAgent } from '../host-defined/engine.mts';
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import { Value } from '../value.mts';
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import { StringValue } from '../static-semantics/all.mts';
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import { Q, NormalCompletion } from '../completion.mts';
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import type { ParseNode } from '../parser/ParseNode.mts';
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import type { PlainEvaluator, ValueEvaluator } from '../evaluator.mts';
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import {
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InitializeBoundName, ClassDefinitionEvaluation, type DecoratorDefinitionRecord, DecoratorListEvaluation,
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} from './all.mts';
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/** https://tc39.es/ecma262/#sec-runtime-semantics-bindingclassdeclarationevaluation */
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// ClassDeclaration :
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// `class` BindingIdentifier ClassTail
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// `class` ClassTail
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export function* BindingClassDeclarationEvaluation(ClassDeclaration: ParseNode.ClassDeclaration, decorators: readonly DecoratorDefinitionRecord[]): ValueEvaluator {
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const { BindingIdentifier, ClassTail } = ClassDeclaration;
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const sourceText = ClassDeclaration.sourceText;
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if (!BindingIdentifier) {
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return Q(yield* ClassDefinitionEvaluation(ClassTail, Value.undefined, Value('default'), sourceText, decorators));
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}
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// 1. Let className be StringValue of BindingIdentifier.
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const className = StringValue(BindingIdentifier);
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// 2. Let value be ? ClassDefinitionEvaluation of ClassTail with arguments className, className, decorators.
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const value = Q(yield* ClassDefinitionEvaluation(ClassTail, className, className, sourceText, decorators));
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// 4. Let env be the running execution context's LexicalEnvironment.
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const env = surroundingAgent.runningExecutionContext.LexicalEnvironment;
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// 5. Perform ? InitializeBoundName(className, value, env).
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Q(yield* InitializeBoundName(className, value, env));
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// 6. Return value.
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return value;
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}
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/** https://tc39.es/ecma262/#sec-class-definitions-runtime-semantics-evaluation */
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// ClassDeclaration : `class` BindingIdentifier ClassTAil
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export function* Evaluate_ClassDeclaration(ClassDeclaration: ParseNode.ClassDeclaration): PlainEvaluator {
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const decorators = ClassDeclaration.Decorators ? Q(yield* DecoratorListEvaluation(ClassDeclaration.Decorators)) : [];
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// 1. Perform ? BindingClassDeclarationEvaluation of this ClassDeclaration.
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Q(yield* BindingClassDeclarationEvaluation(ClassDeclaration, decorators));
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// 2. Return NormalCompletion(empty).
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return NormalCompletion(undefined);
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}
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