24840707595

Committed 23 Apr 2026 02:22PM UTC coverage: 78.515% (+0.1%) from 78.391%

Build # 24840707595

Build Type

Pull #1893

github

Committed by

web-flow

Commit Message

Merge 1b47f66fa into 715603479

Pull Request Pull Request #1893: Error Handling and Stringify Changes

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Branch coverage included in aggregate %.

870 of 1046 new or added lines in 92 files covered. (83.17%)

20 existing lines in 11 files now uncovered.

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69.57

/src/stepper/nodes/Statement/VariableDeclaration.ts

import type { Comment, SourceLocation, VariableDeclaration, VariableDeclarator } from 'estree';
import { type StepperExpression, type StepperPattern, undefinedNode } from '..';
import { convert } from '../../generator';
import { StepperBaseNode } from '../../interface';
import type { RedexInfo } from '../..';

export class StepperVariableDeclarator
  extends StepperBaseNode<VariableDeclarator>
  implements VariableDeclarator
{
  constructor(
    public readonly id: StepperPattern,
    public readonly init: StepperExpression | null | undefined,
    leadingComments?: Comment[] | undefined,
    trailingComments?: Comment[] | undefined,
    loc?: SourceLocation | null | undefined,
    range?: [number, number] | undefined,
  ) {
    super('VariableDeclarator', leadingComments, trailingComments, loc, range);
  }

  static create(node: VariableDeclarator) {
    return new StepperVariableDeclarator(
      convert(node.id),
      node.init ? convert(node.init) : node.init,
      node.leadingComments,
      node.trailingComments,
      node.loc,
      node.range,
    );
  }

  public override isContractible(redex: RedexInfo): boolean {
    return this.init ? this.init.isContractible(redex) : false;
  }

  public override isOneStepPossible(redex: RedexInfo): boolean {
    return this.init ? this.init.isOneStepPossible(redex) : false;
  }

  public override contract(redex: RedexInfo): StepperVariableDeclarator {
    return new StepperVariableDeclarator(
      this.id,
      this.init!.oneStep(redex),
      this.leadingComments,
      this.trailingComments,
      this.loc,
      this.range,
    );
  }

  public override oneStep(redex: RedexInfo): StepperVariableDeclarator {
    return new StepperVariableDeclarator(
      this.id,
      this.init!.oneStep(redex),
      this.leadingComments,
      this.trailingComments,
      this.loc,
      this.range,
    );
  }

  public override substitute(
    id: StepperPattern,
    value: StepperExpression,
    redex: RedexInfo,
  ): StepperBaseNode {
    return new StepperVariableDeclarator(
      this.id,
      this.init!.substitute(id, value, redex),
      this.leadingComments,
      this.trailingComments,
      this.loc,
      this.range,
    );
  }

  public override freeNames(): string[] {
    return this.init!.freeNames();
  }

  public override allNames(): string[] {
    return this.init!.allNames();
  }

  public override rename(before: string, after: string): StepperVariableDeclarator {
    return new StepperVariableDeclarator(
      this.id.rename(before, after),
      this.init!.rename(before, after),
      this.leadingComments,
      this.trailingComments,
      this.loc,
      this.range,
    );
  }
}

// After all variable declarators have been contracted,
// StepperVariableDeclaration::contract triggers substitution
export class StepperVariableDeclaration
  extends StepperBaseNode<VariableDeclaration>
  implements VariableDeclaration
{
  constructor(
    public readonly declarations: StepperVariableDeclarator[],
    public readonly kind: VariableDeclaration['kind'],
    leadingComments?: Comment[] | undefined,
    trailingComments?: Comment[] | undefined,
    loc?: SourceLocation | null | undefined,
    range?: [number, number] | undefined,
  ) {
    super('VariableDeclaration', leadingComments, trailingComments, loc, range);
  }

  static create(node: VariableDeclaration) {
    return new StepperVariableDeclaration(
      node.declarations.map(StepperVariableDeclarator.create),
      node.kind,
      node.leadingComments,
      node.trailingComments,
      node.loc,
      node.range,
    );
  }

  public override isContractible(): boolean {
    return false;
  }

  public override isOneStepPossible(redex: RedexInfo): boolean {
    return this.declarations
      .map(x => x.isOneStepPossible(redex))
      .reduce((acc, next) => acc || next, false);
  }

  public override contract(redex: RedexInfo): typeof undefinedNode {
    redex.preRedex = [this];
    redex.postRedex = [];
    return undefinedNode;
  }

  contractEmpty(redex: RedexInfo) {
    redex.preRedex = [this];
    redex.postRedex = [];
  }

  public override oneStep(redex: RedexInfo): StepperVariableDeclaration | typeof undefinedNode {
    // Find the one that is not contractible.
    for (let i = 0; i < this.declarations.length; i++) {
      const ast = this.declarations[i];
      if (ast.isOneStepPossible(redex)) {
        return new StepperVariableDeclaration(
          [
            this.declarations.slice(0, i),
            ast.oneStep(redex),
            this.declarations.slice(i + 1),
          ].flat(),
          this.kind,
          this.leadingComments,
          this.trailingComments,
          this.loc,
          this.range,
        );
      }
    }

    return this;
  }

  public override substitute(
    id: StepperPattern,
    value: StepperExpression,
    redex: RedexInfo,
  ): StepperBaseNode {
    return new StepperVariableDeclaration(
      this.declarations.map(
        declaration => declaration.substitute(id, value, redex) as StepperVariableDeclarator,
      ),
      this.kind,
      this.leadingComments,
      this.trailingComments,
      this.loc,
      this.range,
    );
  }

  public override freeNames(): string[] {
    return Array.from(new Set(this.declarations.flatMap(ast => ast.freeNames())));
  }

  public override allNames(): string[] {
    return Array.from(new Set(this.declarations.flatMap(ast => ast.allNames())));
  }

  rename(before: string, after: string): StepperVariableDeclaration {
    return new StepperVariableDeclaration(
      this.declarations.map(declaration => declaration.rename(before, after)),
      this.kind,
      this.leadingComments,
      this.trailingComments,
      this.loc,
      this.range,
    );
  }
}

1	import type { Comment, SourceLocation, VariableDeclaration, VariableDeclarator } from 'estree';
2	import { type StepperExpression, type StepperPattern, undefinedNode } from '..';
3	import { convert } from '../../generator';
4	import { StepperBaseNode } from '../../interface';
5	import type { RedexInfo } from '../..';
6
7	export class StepperVariableDeclarator
8	extends StepperBaseNode<VariableDeclarator>
9	implements VariableDeclarator
10	{
11	constructor(
12	public readonly id: StepperPattern,	1,634✔
13	public readonly init: StepperExpression \| null \| undefined,	1,634✔
14	leadingComments?: Comment[] \| undefined,
15	trailingComments?: Comment[] \| undefined,
16	loc?: SourceLocation \| null \| undefined,
17	range?: [number, number] \| undefined,
18	) {
19	super('VariableDeclarator', leadingComments, trailingComments, loc, range);	1,634✔
20	}
21
22	static create(node: VariableDeclarator) {
23	return new StepperVariableDeclarator(	350✔
24	convert(node.id),
25	node.init ? convert(node.init) : node.init,	350!
26	node.leadingComments,
27	node.trailingComments,
28	node.loc,
29	node.range,
30	);
31	}
32
33	public override isContractible(redex: RedexInfo): boolean {
NEW 34	return this.init ? this.init.isContractible(redex) : false;	×
35	}
36
37	public override isOneStepPossible(redex: RedexInfo): boolean {
38	return this.init ? this.init.isOneStepPossible(redex) : false;	417!
39	}
40
41	public override contract(redex: RedexInfo): StepperVariableDeclarator {
42	return new StepperVariableDeclarator(	×
43	this.id,
44	this.init!.oneStep(redex),
45	this.leadingComments,
46	this.trailingComments,
47	this.loc,
48	this.range,
49	);
50	}
51
52	public override oneStep(redex: RedexInfo): StepperVariableDeclarator {
53	return new StepperVariableDeclarator(	90✔
54	this.id,
55	this.init!.oneStep(redex),
56	this.leadingComments,
57	this.trailingComments,
58	this.loc,
59	this.range,
60	);
61	}
62
63	public override substitute(
64	id: StepperPattern,
65	value: StepperExpression,
66	redex: RedexInfo,
67	): StepperBaseNode {
68	return new StepperVariableDeclarator(	1,149✔
69	this.id,
70	this.init!.substitute(id, value, redex),
71	this.leadingComments,
72	this.trailingComments,
73	this.loc,
74	this.range,
75	);
76	}
77
78	public override freeNames(): string[] {
79	return this.init!.freeNames();	90✔
80	}
81
82	public override allNames(): string[] {
83	return this.init!.allNames();	527✔
84	}
85
86	public override rename(before: string, after: string): StepperVariableDeclarator {
87	return new StepperVariableDeclarator(	4✔
88	this.id.rename(before, after),
89	this.init!.rename(before, after),
90	this.leadingComments,
91	this.trailingComments,
92	this.loc,
93	this.range,
94	);
95	}
96	}
97
98	// After all variable declarators have been contracted,
99	// StepperVariableDeclaration::contract triggers substitution
100	export class StepperVariableDeclaration
101	extends StepperBaseNode<VariableDeclaration>
102	implements VariableDeclaration
103	{
104	constructor(
105	public readonly declarations: StepperVariableDeclarator[],	1,593✔
106	public readonly kind: VariableDeclaration['kind'],	1,593✔
107	leadingComments?: Comment[] \| undefined,
108	trailingComments?: Comment[] \| undefined,
109	loc?: SourceLocation \| null \| undefined,
110	range?: [number, number] \| undefined,
111	) {
112	super('VariableDeclaration', leadingComments, trailingComments, loc, range);	1,593✔
113	}
114
115	static create(node: VariableDeclaration) {
116	return new StepperVariableDeclaration(	350✔
117	node.declarations.map(StepperVariableDeclarator.create),
118	node.kind,
119	node.leadingComments,
120	node.trailingComments,
121	node.loc,
122	node.range,
123	);
124	}
125
126	public override isContractible(): boolean {
127	return false;	×
128	}
129
130	public override isOneStepPossible(redex: RedexInfo): boolean {
131	return this.declarations	327✔
132	.map(x => x.isOneStepPossible(redex))	327✔
133	.reduce((acc, next) => acc \|\| next, false);	327✔
134	}
135
136	public override contract(redex: RedexInfo): typeof undefinedNode {
137	redex.preRedex = [this];	×
138	redex.postRedex = [];	×
139	return undefinedNode;	×
140	}
141
142	contractEmpty(redex: RedexInfo) {
143	redex.preRedex = [this];	×
144	redex.postRedex = [];	×
145	}
146
147	public override oneStep(redex: RedexInfo): StepperVariableDeclaration \| typeof undefinedNode {
148	// Find the one that is not contractible.
149	for (let i = 0; i < this.declarations.length; i++) {	90✔
150	const ast = this.declarations[i];	90✔
151	if (ast.isOneStepPossible(redex)) {	90!
152	return new StepperVariableDeclaration(	90✔
153	[
154	this.declarations.slice(0, i),
155	ast.oneStep(redex),
156	this.declarations.slice(i + 1),
157	].flat(),
158	this.kind,
159	this.leadingComments,
160	this.trailingComments,
161	this.loc,
162	this.range,
163	);
164	}
165	}
166
167	return this;	×
168	}
169
170	public override substitute(
171	id: StepperPattern,
172	value: StepperExpression,
173	redex: RedexInfo,
174	): StepperBaseNode {
175	return new StepperVariableDeclaration(	1,149✔
176	this.declarations.map(
177	declaration => declaration.substitute(id, value, redex) as StepperVariableDeclarator,	1,149✔
178	),
179	this.kind,
180	this.leadingComments,
181	this.trailingComments,
182	this.loc,
183	this.range,
184	);
185	}
186
187	public override freeNames(): string[] {
188	return Array.from(new Set(this.declarations.flatMap(ast => ast.freeNames())));	90✔
189	}
190
191	public override allNames(): string[] {
192	return Array.from(new Set(this.declarations.flatMap(ast => ast.allNames())));	527✔
193	}
194
195	rename(before: string, after: string): StepperVariableDeclaration {
196	return new StepperVariableDeclaration(	4✔
197	this.declarations.map(declaration => declaration.rename(before, after)),	4✔
198	this.kind,
199	this.leadingComments,
200	this.trailingComments,
201	this.loc,
202	this.range,
203	);
204	}
205	}

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