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1/*
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16import { CmdOptions } from "../cmdOptions";
17import { NodeKind } from "../debuginfo";
18import * as ts from "typescript";
19import {
20    Label,
21    VReg
22} from "../irnodes";
23import { PandaGen } from "../pandagen";
24import { CatchTable } from "../statement/tryStatement";
25
26export enum FunctionBuilderType {
27    NORMAL,
28    GENERATOR,
29    ASYNC,
30    ASYNCGENERATOR
31}
32
33export class FunctionBuilder {
34    protected pg: PandaGen | undefined = undefined;
35    protected funcObj: VReg | undefined = undefined;
36    protected resumeVal: VReg | undefined = undefined;
37    protected resumeType: VReg | undefined = undefined;
38    protected beginLabel: Label | undefined = undefined;
39    protected endLabel: Label | undefined = undefined;
40
41    constructor(pg: PandaGen) {
42        this.pg = pg;
43    }
44
45    // @ts-ignore
46    prepare(node: ts.Node): void {
47    }
48
49    // @ts-ignore
50    cleanUp(node: ts.Node): void {
51    }
52
53    functionAwait(node: ts.Node): void {
54        let pg = this.pg;
55
56        // value is in acc
57        pg.asyncFunctionAwaitUncaught(node, this.funcObj);
58        pg.suspendGenerator(node, this.funcObj);
59
60        pg.resumeGenerator(node, this.funcObj);
61        pg.storeAccumulator(node, this.resumeVal);
62    }
63
64    resumeGenerator(node: ts.Node | NodeKind) {
65        let pg = this.pg;
66        pg.resumeGenerator(node, this.funcObj);
67        pg.storeAccumulator(node, this.resumeVal);
68        pg.getResumeMode(node, this.funcObj);
69        pg.storeAccumulator(node, this.resumeType);
70    }
71
72    explicitReturn(node: ts.Node | NodeKind, empty ? : boolean) {
73        this.pg.return(node);
74    }
75
76    implicitReturn(node: ts.Node | NodeKind) {
77        CmdOptions.isWatchEvaluateExpressionMode() ? this.pg.return(NodeKind.Invalid) : this.pg.returnUndefined(node);
78    }
79
80    builderType(): FunctionBuilderType {
81        return FunctionBuilderType.NORMAL;
82    }
83}