@angular/compiler
Version:
Angular - the compiler library
47 lines • 6.47 kB
JavaScript
/**
* @license
* Copyright Google LLC 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 * as o from '../../output/output_ast';
import { Identifiers as R3 } from '../r3_identifiers';
import { createPipeType } from '../r3_pipe_compiler';
import { DefinitionMap } from '../view/util';
/**
* Every time we make a breaking change to the declaration interface or partial-linker behavior, we
* must update this constant to prevent old partial-linkers from incorrectly processing the
* declaration.
*
* Do not include any prerelease in these versions as they are ignored.
*/
const MINIMUM_PARTIAL_LINKER_VERSION = '12.0.0';
/**
* Compile a Pipe declaration defined by the `R3PipeMetadata`.
*/
export function compileDeclarePipeFromMetadata(meta) {
const definitionMap = createPipeDefinitionMap(meta);
const expression = o.importExpr(R3.declarePipe).callFn([definitionMap.toLiteralMap()]);
const type = createPipeType(meta);
return { expression, type, statements: [] };
}
/**
* Gathers the declaration fields for a Pipe into a `DefinitionMap`.
*/
export function createPipeDefinitionMap(meta) {
const definitionMap = new DefinitionMap();
definitionMap.set('minVersion', o.literal(MINIMUM_PARTIAL_LINKER_VERSION));
definitionMap.set('version', o.literal('13.0.0-rc.0'));
definitionMap.set('ngImport', o.importExpr(R3.core));
// e.g. `type: MyPipe`
definitionMap.set('type', meta.internalType);
// e.g. `name: "myPipe"`
definitionMap.set('name', o.literal(meta.pipeName));
if (meta.pure === false) {
// e.g. `pure: false`
definitionMap.set('pure', o.literal(meta.pure));
}
return definitionMap;
}
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