Function makeConditionalFactory

packages/compiler/src/render3/r3_factory.ts:147–157

(nonCtorExpr: o.Expression)

  let retExpr: o.Expression | null = null;

  function makeConditionalFactory(nonCtorExpr: o.Expression): o.ReadVarExpr {
    const r = o.variable('__ngConditionalFactory__');
    body.push(new o.DeclareVarStmt(r.name, o.NULL_EXPR, o.DYNAMIC_TYPE));
    const ctorStmt =
      ctorExpr !== null
        ? r.set(ctorExpr).toStmt(factoryComments)
        : o.importExpr(R3.invalidFactory).callFn([]).toStmt();
    // Always add a `ts-ignore` on the alternate factory.
    body.push(o.ifStmt(t, [ctorStmt], [r.set(nonCtorExpr).toStmt([tsIgnoreComment()])]));
    return r;
  }

  if (isDelegatedFactoryMetadata(meta)) {
    // This type is created with a delegated factory. If a type parameter is not specified, call