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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88.57

/src/parser/source/typed/utils.ts

import * as es from 'estree';

/**
 * Transforms an AST generated by the Babel parser into one
 * that is compliant with the ESTree types. While the Babel
 * parser-generated AST is mostly compliant with the ESTree
 * specifications due to the use of the 'estree' plugin, not
 * everything is compliant with the ESTree types.
 *
 * @param program The AST to be transformed.
 */
export const transformBabelASTToESTreeCompliantAST = (program: es.Program): void => {
  renameFilenameAttributeToSource(program);
};

/**
 * Renames the 'filename' attribute on AST nodes to 'source'.
 * This is because the Babel parser tags AST nodes with the
 * 'filename' attribute when the name of the file in which
 * the AST was generated from is given. However, by the ESTree
 * types that js-slang uses, this attribute should be named
 * 'source' instead of 'filename'. As a workaround, we
 * recursively walk the AST generated by the Babel parser and
 * replace all instances of the 'filename' attribute with
 * 'source'.
 *
 * Note that we do not use acorn-walk here as a precondition
 * of acorn-walk is that the AST is compliant with the ESTree
 * specifications. Since the reason why we are transforming
 * the AST generated by the Babel parser is because it is not
 * entirely compliant with the ESTree specifications in the
 * first place, we avoid the use of acorn-walk.
 *
 * @param node The node to be transformed.
 */
const renameFilenameAttributeToSource = (node: Record<string, any>): void => {
  // Rename all 'filename' attributes to 'source'.
  if (node.hasOwnProperty('filename')) {
    node.source = node.filename;
    delete node.filename;
  }
  // Iterate over all property values of the AST node.
  Object.values(node).forEach(value => {
    // If the value is null or undefined, do nothing.
    if (value === null || value === undefined) {
      return;
    }
    // If the value is an array, check if any of its elements
    // are objects (i.e., AST nodes) which we should recurse on.
    if (Array.isArray(value)) {
      value.forEach(element => {
        if (element === null || element === undefined) {
          return;
        }
        if (typeof element !== 'object') {
          return;
        }
        renameFilenameAttributeToSource(element);
      });
    }
    // If the value is a primitive type, do nothing.
    if (typeof value !== 'object') {
      return;
    }
    // Otherwise, the value is an object (i.e., AST node) which
    // we recurse on.
    renameFilenameAttributeToSource(value);
  });
};

1	import * as es from 'estree';
2
3	/**
4	* Transforms an AST generated by the Babel parser into one
5	* that is compliant with the ESTree types. While the Babel
6	* parser-generated AST is mostly compliant with the ESTree
7	* specifications due to the use of the 'estree' plugin, not
8	* everything is compliant with the ESTree types.
9	*
10	* @param program The AST to be transformed.
11	*/
12	export const transformBabelASTToESTreeCompliantAST = (program: es.Program): void => {	65✔
13	renameFilenameAttributeToSource(program);	159✔
14	};
15
16	/**
17	* Renames the 'filename' attribute on AST nodes to 'source'.
18	* This is because the Babel parser tags AST nodes with the
19	* 'filename' attribute when the name of the file in which
20	* the AST was generated from is given. However, by the ESTree
21	* types that js-slang uses, this attribute should be named
22	* 'source' instead of 'filename'. As a workaround, we
23	* recursively walk the AST generated by the Babel parser and
24	* replace all instances of the 'filename' attribute with
25	* 'source'.
26	*
27	* Note that we do not use acorn-walk here as a precondition
28	* of acorn-walk is that the AST is compliant with the ESTree
29	* specifications. Since the reason why we are transforming
30	* the AST generated by the Babel parser is because it is not
31	* entirely compliant with the ESTree specifications in the
32	* first place, we avoid the use of acorn-walk.
33	*
34	* @param node The node to be transformed.
35	*/
36	const renameFilenameAttributeToSource = (node: Record<string, any>): void => {	65✔
37	// Rename all 'filename' attributes to 'source'.
38	if (node.hasOwnProperty('filename')) {	162,672✔
39	node.source = node.filename;	6,840✔
40	delete node.filename;	6,840✔
41	}
42	// Iterate over all property values of the AST node.
43	Object.values(node).forEach(value => {	162,672✔
44	// If the value is null or undefined, do nothing.
45	if (value === null \|\| value === undefined) {	539,493✔
46	return;	71,109✔
47	}
48	// If the value is an array, check if any of its elements
49	// are objects (i.e., AST nodes) which we should recurse on.
50	if (Array.isArray(value)) {	468,384✔
51	value.forEach(element => {	19,077✔
52	if (element === null \|\| element === undefined) {	9,064!
NEW 53	return;	×
54	}
55	if (typeof element !== 'object') {	9,064!
NEW 56	return;	×
57	}
58	renameFilenameAttributeToSource(element);	9,064✔
59	});
60	}
61	// If the value is a primitive type, do nothing.
62	if (typeof value !== 'object') {	468,384✔
63	return;	314,935✔
64	}
65	// Otherwise, the value is an object (i.e., AST node) which
66	// we recurse on.
67	renameFilenameAttributeToSource(value);	153,449✔
68	});
69	};

source-academy / js-slang / 23995741899

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