c5400616f8
Previously the renderers were fixed so that they inserted extra "adjacent" statements after the last static property of classes. In order to help the build-optimizer (in Angular CLI) to be able to tree-shake classes effectively, these statements should also appear after any helper calls, such as `__decorate()`. This commit moves the computation of this positioning into the `NgccReflectionHost` via the `getEndOfClass()` method, which returns the last statement that is related to the class. FW-1668 PR Close #33689
39 lines
1.5 KiB
TypeScript
39 lines
1.5 KiB
TypeScript
/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import MagicString from 'magic-string';
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import * as ts from 'typescript';
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import {CompiledClass} from '../analysis/types';
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import {getIifeBody} from '../host/esm5_host';
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import {EsmRenderingFormatter} from './esm_rendering_formatter';
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/**
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* A RenderingFormatter that works with files that use ECMAScript Module `import` and `export`
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* statements, but instead of `class` declarations it uses ES5 `function` wrappers for classes.
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*/
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export class Esm5RenderingFormatter extends EsmRenderingFormatter {
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/**
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* Add the definitions inside the IIFE of each decorated class
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*/
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addDefinitions(output: MagicString, compiledClass: CompiledClass, definitions: string): void {
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const iifeBody = getIifeBody(compiledClass.declaration);
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if (!iifeBody) {
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throw new Error(
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`Compiled class declaration is not inside an IIFE: ${compiledClass.name} in ${compiledClass.declaration.getSourceFile().fileName}`);
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}
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const returnStatement = iifeBody.statements.find(ts.isReturnStatement);
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if (!returnStatement) {
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throw new Error(
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`Compiled class wrapper IIFE does not have a return statement: ${compiledClass.name} in ${compiledClass.declaration.getSourceFile().fileName}`);
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}
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const insertionPoint = returnStatement.getFullStart();
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output.appendLeft(insertionPoint, '\n' + definitions);
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}
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}
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