/
ForInStatement.ts
70 lines (64 loc) · 2.4 KB
/
ForInStatement.ts
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
import MagicString from 'magic-string';
import { NO_SEMICOLON, RenderOptions } from '../../utils/renderHelpers';
import { HasEffectsContext, InclusionContext } from '../ExecutionContext';
import BlockScope from '../scopes/BlockScope';
import Scope from '../scopes/Scope';
import { EMPTY_PATH } from '../utils/PathTracker';
import * as NodeType from './NodeType';
import VariableDeclaration from './VariableDeclaration';
import { ExpressionNode, IncludeChildren, StatementBase, StatementNode } from './shared/Node';
import { PatternNode } from './shared/Pattern';
export default class ForInStatement extends StatementBase {
body!: StatementNode;
left!: VariableDeclaration | PatternNode;
right!: ExpressionNode;
type!: NodeType.tForInStatement;
protected deoptimized = false;
createScope(parentScope: Scope): void {
this.scope = new BlockScope(parentScope);
}
hasEffects(context: HasEffectsContext): boolean {
if (!this.deoptimized) this.applyDeoptimizations();
if (
(this.left &&
(this.left.hasEffects(context) ||
this.left.hasEffectsWhenAssignedAtPath(EMPTY_PATH, context))) ||
(this.right && this.right.hasEffects(context))
)
return true;
const {
brokenFlow,
ignore: { breaks, continues }
} = context;
context.ignore.breaks = true;
context.ignore.continues = true;
if (this.body.hasEffects(context)) return true;
context.ignore.breaks = breaks;
context.ignore.continues = continues;
context.brokenFlow = brokenFlow;
return false;
}
include(context: InclusionContext, includeChildrenRecursively: IncludeChildren): void {
if (!this.deoptimized) this.applyDeoptimizations();
this.included = true;
this.left.include(context, includeChildrenRecursively || true);
this.right.include(context, includeChildrenRecursively);
const { brokenFlow } = context;
this.body.includeAsSingleStatement(context, includeChildrenRecursively);
context.brokenFlow = brokenFlow;
}
render(code: MagicString, options: RenderOptions): void {
this.left.render(code, options, NO_SEMICOLON);
this.right.render(code, options, NO_SEMICOLON);
// handle no space between "in" and the right side
if (code.original.charCodeAt(this.right.start - 1) === 110 /* n */) {
code.prependLeft(this.right.start, ' ');
}
this.body.render(code, options);
}
protected applyDeoptimizations(): void {
this.deoptimized = true;
this.left.deoptimizePath(EMPTY_PATH);
this.context.requestTreeshakingPass();
}
}