23995741899

Committed 05 Apr 2026 06:14AM UTC coverage: 77.093% (+0.002%) from 77.091%

Build # 23995741899

Build Type

push

github

Committed by

web-flow

Commit Message

Upgrade to TypeScript 6 and Prettier improvements (#1936)

* Upgrade TypeScript to v6

* Fix import source

* Fix tsconfig

* Fix preexisting type errors

* Remove scm-slang

* Bump node types

* Fix tsconfig

* Fix node types specifier

* Enable trailing commas

* Enable semicolons

* Check and commit files with changed line numbers

* Update Yarn to 4.13.0

* Remove unneeded sicp package deps

Coverage Stats

3112 of 4282 branches covered (72.68%)

Branch coverage included in aggregate %.

3761 of 5218 new or added lines in 152 files covered. (72.08%)

26 existing lines in 9 files now uncovered.

7136 of 9011 relevant lines covered (79.19%)

175254.05 hits per line

Source File
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72.73

/src/parser/source/rules/noDeclareMutable.ts

import { generate } from 'astring';
import type { VariableDeclaration } from 'estree';
import { Chapter } from '../../../langs';
import { getSourceVariableDeclaration } from '../../../utils/ast/helpers';
import { RuleError } from '../../errors';
import type { Rule } from '../../types';

const mutableDeclarators: VariableDeclaration['kind'][] = ['let', 'var'];

export class NoDeclareMutableError extends RuleError<VariableDeclaration> {
  public explain() {
    return `Mutable variable declaration using keyword '${this.node.kind}' is not allowed.`;
  }

  public elaborate() {
    const {
      id: { name },
      init,
    } = getSourceVariableDeclaration(this.node);
    const value = generate(init);

    return `Use keyword "const" instead, to declare a constant:\n\n\tconst ${name} = ${value};`;
  }
}

const noDeclareMutable: Rule<VariableDeclaration> = {
  name: 'no-declare-mutable',
  disableFromChapter: Chapter.SOURCE_3,

  checkers: {
    VariableDeclaration(node) {
      if (mutableDeclarators.includes(node.kind)) {
        return [new NoDeclareMutableError(node)];
      } else {
        return [];
      }
    },
  },
};

export default noDeclareMutable;

1	import { generate } from 'astring';
2	import type { VariableDeclaration } from 'estree';
3	import { Chapter } from '../../../langs';
4	import { getSourceVariableDeclaration } from '../../../utils/ast/helpers';
5	import { RuleError } from '../../errors';
6	import type { Rule } from '../../types';
7
8	const mutableDeclarators: VariableDeclaration['kind'][] = ['let', 'var'];	65✔
9
10	export class NoDeclareMutableError extends RuleError<VariableDeclaration> {
11	public explain() {
12	return `Mutable variable declaration using keyword '${this.node.kind}' is not allowed.`;	11✔
13	}
14
15	public elaborate() {
16	const {
17	id: { name },
NEW 18	init,	×
19	} = getSourceVariableDeclaration(this.node);
NEW 20	const value = generate(init);	×
21
NEW 22	return `Use keyword "const" instead, to declare a constant:\n\n\tconst ${name} = ${value};`;	×
23	}
24	}
25
26	const noDeclareMutable: Rule<VariableDeclaration> = {	65✔
27	name: 'no-declare-mutable',
28	disableFromChapter: Chapter.SOURCE_3,
29
30	checkers: {
31	VariableDeclaration(node) {
32	if (mutableDeclarators.includes(node.kind)) {	3,871✔
33	return [new NoDeclareMutableError(node)];	11✔
34	} else {
35	return [];	3,860✔
36	}
37	},
38	},
39	};
40
41	export default noDeclareMutable;

source-academy / js-slang / 23995741899

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