angular-docs-cn/packages/compiler/src/render3/r3_module_compiler.ts

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/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import {StaticSymbol} from '../aot/static_symbol';
import {CompileShallowModuleMetadata, identifierName} from '../compile_metadata';
import {InjectableCompiler} from '../injectable_compiler';
import {mapLiteral} from '../output/map_util';
import * as o from '../output/output_ast';
import {OutputContext} from '../util';
import {Identifiers as R3} from './r3_identifiers';
function convertMetaToOutput(meta: any, ctx: OutputContext): o.Expression {
if (Array.isArray(meta)) {
return o.literalArr(meta.map(entry => convertMetaToOutput(entry, ctx)));
}
if (meta instanceof StaticSymbol) {
return ctx.importExpr(meta);
}
if (meta == null) {
return o.literal(meta);
}
throw new Error(`Internal error: Unsupported or unknown metadata: ${meta}`);
}
export function compileNgModule(
ctx: OutputContext, ngModule: CompileShallowModuleMetadata,
injectableCompiler: InjectableCompiler): void {
const className = identifierName(ngModule.type) !;
const rawImports = ngModule.rawImports ? [ngModule.rawImports] : [];
const rawExports = ngModule.rawExports ? [ngModule.rawExports] : [];
const injectorDefArg = mapLiteral({
'factory':
injectableCompiler.factoryFor({type: ngModule.type, symbol: ngModule.type.reference}, ctx),
'providers': convertMetaToOutput(ngModule.rawProviders, ctx),
'imports': convertMetaToOutput([...rawImports, ...rawExports], ctx),
});
const injectorDef = o.importExpr(R3.defineInjector).callFn([injectorDefArg]);
ctx.statements.push(new o.ClassStmt(
/* name */ className,
/* parent */ null,
/* fields */[new o.ClassField(
/* name */ 'ngInjectorDef',
/* type */ o.INFERRED_TYPE,
/* modifiers */[o.StmtModifier.Static],
/* initializer */ injectorDef, )],
/* getters */[],
/* constructorMethod */ new o.ClassMethod(null, [], []),
/* methods */[]));
}