18446573451

Committed 12 Oct 2025 04:29PM UTC coverage: 77.423% (-0.01%) from 77.433%

Build # 18446573451

Build Type

Pull #1821

github

Committed by

web-flow

Commit Message

Merge 2de06d8f6 into 4105ea06f

Pull Request Pull Request #1821: Check for const declaration in for statement init

Run Details

2749 of 3848 branches covered (71.44%)

Branch coverage included in aggregate %.

7 of 11 new or added lines in 2 files covered. (63.64%)

8204 of 10299 relevant lines covered (79.66%)

135154.4 hits per line

Source File
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66.67

/src/parser/source/rules/noConstDeclarationInForLoopInit.ts

import type { ForStatement } from 'estree'
import type { Rule } from '../../types'
import { stripIndent } from '../../../utils/formatters'
import { RuleError } from '../../errors'

export class NoConstDeclarationInForLoopInit extends RuleError<ForStatement> {
  constructor(node: ForStatement) {
    super(node)
  }
  public explain(): string {
    return 'Const declaration in init part of for statement is not allowed'
  }
  public elaborate(): string {
    return stripIndent`
      The init part of this statement cannot contain a const declaration, use a let declaration instead.
    `
  }
}
const noConstDeclarationInForLoopInit: Rule<ForStatement> = {
  name: 'no-const-declaration-in-for-loop-init',

  checkers: {
    ForStatement(node) {
      if (node.init && node.init.type === 'VariableDeclaration' && node.init.kind === 'const') {
        return [new NoConstDeclarationInForLoopInit(node)]
      }

      return []
    }
  }
}

export { noConstDeclarationInForLoopInit }

1	import type { ForStatement } from 'estree'
2	import type { Rule } from '../../types'
3	import { stripIndent } from '../../../utils/formatters'	72✔
4	import { RuleError } from '../../errors'	72✔
5
6	export class NoConstDeclarationInForLoopInit extends RuleError<ForStatement> {	72✔
7	constructor(node: ForStatement) {
NEW 8	super(node)	×
9	}
10	public explain(): string {
NEW 11	return 'Const declaration in init part of for statement is not allowed'	×
12	}
13	public elaborate(): string {
NEW 14	return stripIndent`	×
15	The init part of this statement cannot contain a const declaration, use a let declaration instead.
16	`
17	}
18	}
19	const noConstDeclarationInForLoopInit: Rule<ForStatement> = {	72✔
20	name: 'no-const-declaration-in-for-loop-init',
21
22	checkers: {
23	ForStatement(node) {
24	if (node.init && node.init.type === 'VariableDeclaration' && node.init.kind === 'const') {	742!
NEW 25	return [new NoConstDeclarationInForLoopInit(node)]	×
26	}
27
28	return []	742✔
29	}
30	}
31	}
32
33	export { noConstDeclarationInForLoopInit }	72✔

source-academy / js-slang / 18446573451

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