{"id":13036,"library":"cwise-parser","title":"cwise-parser","description":"cwise-parser is an internal utility package within the scijs ecosystem, specifically designed as a preprocessor for the `cwise` library. The `cwise` library facilitates component-wise operations on `ndarray` (N-dimensional array) data structures in JavaScript. This parser is not intended for direct public consumption; instead, it processes user-defined functions and arguments for `cwise`, transforming them into an intermediate representation suitable for `cwise`'s internal compilation process. The package is currently at version 1.0.3, last published in 2016. While still functional as a dependency of `cwise`, it is part of an older, less actively developed set of tools, meaning new features are unlikely, and maintenance is minimal. Its core differentiator is its specialized role in the `cwise`/`ndarray` pipeline for optimizing numerical operations.","status":"maintenance","version":"1.0.3","language":"javascript","source_language":"en","source_url":"git://github.com/scijs/cwise-parser","tags":["javascript","cwise","parser","ndarray","internals"],"install":[{"cmd":"npm install cwise-parser","lang":"bash","label":"npm"},{"cmd":"yarn add cwise-parser","lang":"bash","label":"yarn"},{"cmd":"pnpm add cwise-parser","lang":"bash","label":"pnpm"}],"dependencies":[{"reason":"cwise-parser is an internal dependency and preprocessor for the cwise library; it is not designed for standalone use.","package":"cwise","optional":false}],"imports":[{"note":"This package is an older CommonJS module. ESM `import` syntax will not work directly without transpilation or dynamic `import()`.","wrong":"import parseCWise from 'cwise-parser';","symbol":"parseCWise","correct":"const parseCWise = require('cwise-parser');"},{"note":"The package likely exports a single function. Accessing this function directly is possible but strongly discouraged as per the README.","symbol":"parseFn","correct":"const parseFn = require('cwise-parser');"},{"note":"cwise-parser likely returns a specific data structure representing the parsed cwise procedure, but this is an internal interface not explicitly exported for public use.","symbol":"CWiseProcedure","correct":"// No direct export, typically used internally by cwise compiler"}],"quickstart":{"code":"const parseCWise = require('cwise-parser');\n\n// IMPORTANT: This package is NOT intended for direct use. It is an internal dependency of `cwise`.\n// The example below demonstrates a hypothetical direct usage, but should be avoided in applications.\n\nfunction addVectors(a, b, out) {\n  out = a + b;\n}\n\n// Simulate how cwise-parser might process a user-defined function\n// It typically expects a function along with its argument types for cwise.\n// The exact 'args' format is internal to cwise/cwise-parser.\nconst procedureSpec = {\n  args: [\n    { type: 'array', count: 1, name: 'a' },\n    { type: 'array', count: 1, name: 'b' },\n    { type: 'array', count: 1, name: 'out', 'output': true }\n  ],\n  func: addVectors.toString() // cwise-parser might take the function's string representation\n};\n\ntry {\n  const parsedResult = parseCWise(procedureSpec.func, procedureSpec.args);\n  console.log('Successfully (hypothetically) parsed the cwise procedure.');\n  console.log('Parsed structure example (actual output may vary):', Object.keys(parsedResult));\n  // A real result would be a complex AST-like object specific to cwise's compilation.\n} catch (error) {\n  console.error('Error parsing with cwise-parser:', error.message);\n  console.warn('Remember, direct use of cwise-parser is not recommended and its API is internal.');\n}\n\n// Example of cwise usage, which internally uses cwise-parser:\n/*\nconst cwise = require('cwise');\nconst ndarray = require('ndarray');\n\nconst add = cwise({\n  args: ['array', 'array', 'array'],\n  body: function (a, b, out) {\n    out = a + b;\n  }\n});\n\nconst A = ndarray([1, 2, 3]);\nconst B = ndarray([4, 5, 6]);\nconst C = ndarray([0, 0, 0]);\n\nadd(A, B, C);\nconsole.log('Result from cwise (internal use of cwise-parser):', C.data); // Expected: [5, 7, 9]\n*/","lang":"javascript","description":"Demonstrates a hypothetical (and discouraged) direct usage of cwise-parser, showing how it might process a function and argument specification. Also illustrates how the parent `cwise` library typically uses it internally."},"warnings":[{"fix":"Interact with cwise-parser indirectly through the `cwise` package, which provides a stable public API for component-wise operations on ndarrays.","message":"cwise-parser is an internal module, not intended for direct public use. Its API may change without warning, and direct usage is highly discouraged by the maintainers. Always use it via its consumer, the `cwise` library.","severity":"gotcha","affected_versions":">=1.0.0"},{"fix":"Exercise caution, perform security audits of your dependency tree, and consider alternative actively maintained libraries for new projects if possible. For existing projects, monitor `cwise` and its dependencies for security updates.","message":"The package has not seen active development since its last release in 2016 (version 1.0.3), and the parent `cwise` library itself has open issues regarding outdated dependencies and potential security vulnerabilities (e.g., `static-module` CVEs). Users should be aware of the risks associated with older, less maintained codebases, especially concerning transitive dependencies like `esprima` that `cwise-parser` might implicitly rely on for JavaScript parsing.","severity":"gotcha","affected_versions":">=1.0.0"},{"fix":"Refrain from `require('cwise-parser')` in your application code. Instead, use the higher-level `cwise` API.","message":"While the package is technically 'maintained' as a dependency of `cwise`, its standalone usage patterns are effectively deprecated due to its internal nature and the clear guidance against direct invocation in its README and related packages like `cwise-compiler`.","severity":"deprecated","affected_versions":">=1.0.0"}],"env_vars":null,"last_verified":"2026-04-19T00:00:00.000Z","next_check":"2026-07-18T00:00:00.000Z","problems":[{"fix":"The module likely exports a function directly upon `require`. Try `const parseCWise = require('cwise-parser'); parseCWise(...)` assuming it takes arguments. Consult `cwise`'s internal source code for the exact expected signature if direct debugging is necessary, but again, direct use is not recommended.","cause":"Attempting to call `require('cwise-parser')` as a function without knowing its specific export structure, or if it indeed exports a function directly.","error":"TypeError: parseCWise is not a function"},{"fix":"This package is designed to be consumed by `cwise`. Do not use `cwise-parser` directly. Utilize the `cwise` package for component-wise array operations.","cause":"While not explicitly present in the README, some internal libraries implement checks to prevent direct external invocation, throwing an error if used standalone.","error":"Error: This module is intended for internal use only."},{"fix":"Ensure the package is installed: `npm install cwise-parser`. Verify your `require()` path is correct relative to `node_modules`.","cause":"The package is not installed or the path is incorrect.","error":"Cannot find module 'cwise-parser'"}],"ecosystem":"npm","meta_description":null,"install_score":null,"install_tag":null,"quickstart_score":null,"quickstart_tag":null,"pypi_latest":null,"cli_name":""}