From 46a9e883500ff93ea0022ffff6be14b61152ef2f Mon Sep 17 00:00:00 2001
From: sbosse <sbosse@uni-bremen.de>
Date: Mon, 21 Jul 2025 23:17:45 +0200
Subject: [PATCH] Mon 21 Jul 22:43:21 CEST 2025

---
 js/parser/esparse.js | 126 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 126 insertions(+)
 create mode 100644 js/parser/esparse.js

diff --git a/js/parser/esparse.js b/js/parser/esparse.js
new file mode 100644
index 0000000..30e98fc
--- /dev/null
+++ b/js/parser/esparse.js
@@ -0,0 +1,126 @@
+#!/usr/bin/env node
+/*
+  Copyright (c) jQuery Foundation, Inc. and Contributors, All Rights Reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+/*jslint sloppy:true node:true rhino:true */
+
+var fs, esprima, fname, content, options, syntax;
+
+if (typeof require === 'function') {
+    fs = require('fs');
+    esprima = require('./esprima');
+} else if (typeof load === 'function') {
+    try {
+        load('esprima.js');
+    } catch (e) {
+        load('../esprima.js');
+    }
+}
+
+// Shims to Node.js objects when running under Rhino.
+if (typeof console === 'undefined' && typeof process === 'undefined') {
+    console = { log: print };
+    fs = { readFileSync: readFile };
+    process = { argv: arguments, exit: quit };
+    process.argv.unshift('esparse.js');
+    process.argv.unshift('rhino');
+}
+
+function showUsage() {
+    console.log('Usage:');
+    console.log('   esparse [options] file.js');
+    console.log();
+    console.log('Available options:');
+    console.log();
+    console.log('  --comment      Gather all line and block comments in an array');
+    console.log('  --loc          Include line-column location info for each syntax node');
+    console.log('  --range        Include index-based range for each syntax node');
+    console.log('  --raw          Display the raw value of literals');
+    console.log('  --tokens       List all tokens in an array');
+    console.log('  --tolerant     Tolerate errors on a best-effort basis (experimental)');
+    console.log('  -v, --version  Shows program version');
+    console.log();
+    process.exit(1);
+}
+
+if (process.argv.length <= 2) {
+    showUsage();
+}
+
+options = {};
+
+process.argv.splice(2).forEach(function (entry) {
+
+    if (entry === '-h' || entry === '--help') {
+        showUsage();
+    } else if (entry === '-v' || entry === '--version') {
+        console.log('ECMAScript Parser (using Esprima version', esprima.version, ')');
+        console.log();
+        process.exit(0);
+    } else if (entry === '--comment') {
+        options.comment = true;
+    } else if (entry === '--loc') {
+        options.loc = true;
+    } else if (entry === '--range') {
+        options.range = true;
+    } else if (entry === '--raw') {
+        options.raw = true;
+    } else if (entry === '--tokens') {
+        options.tokens = true;
+    } else if (entry === '--tolerant') {
+        options.tolerant = true;
+    } else if (entry.slice(0, 2) === '--') {
+        console.log('Error: unknown option ' + entry + '.');
+        process.exit(1);
+    } else if (typeof fname === 'string') {
+        console.log('Error: more than one input file.');
+        process.exit(1);
+    } else {
+        fname = entry;
+    }
+});
+
+if (typeof fname !== 'string') {
+    console.log('Error: no input file.');
+    process.exit(1);
+}
+
+// Special handling for regular expression literal since we need to
+// convert it to a string literal, otherwise it will be decoded
+// as object "{}" and the regular expression would be lost.
+function adjustRegexLiteral(key, value) {
+    if (key === 'value' && value instanceof RegExp) {
+        value = value.toString();
+    }
+    return value;
+}
+
+try {
+    content = fs.readFileSync(fname, 'utf-8');
+    syntax = esprima.parse(content, options);
+    console.log(JSON.stringify(syntax, adjustRegexLiteral, 4));
+} catch (e) {
+    console.log('Error: ' + e.message);
+    process.exit(1);
+}