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The getParameters function is an asynchronous function that extracts data from a provided C++ code string using the select function from the antlr tree package. It imports the select function using an importer object and returns the extracted data, which is then exported as a module.

Run example

npm run import -- "get c parameters"

get c parameters


async function getParameters(code) {
    const selectCode = await importer.import("select antlr tree")
    const result = await selectCode(['//functionDefinition', './declarator//declaratorid/@strdata'], code, 'cpp')
    return result
}

module.exports = getParameters

What the code could have been:

/**
 * Retrieves parameters from a given code snippet.
 * @param {string} code - The code snippet to extract parameters from.
 * @returns {Promise} An object containing the extracted parameters.
 */
async function getParameters(code) {
  try {
    // Import the necessary library
    const { importANTLRTree } = await import('antlr4/tree');
    
    // Create an instance of the ANTLR tree parser
    const parser = new importANTLRTree();
    
    // Define the grammar rules to follow
    const rules = [
      {
        rule: '//functionDefinition',
        path: './declarator//declaratorid/@strdata'
      }
    ];
    
    // Parse the code using the grammar rules
    const result = await parser.parseCode(code, 'cpp', rules);
    
    return result;
  } catch (error) {
    console.error('Failed to retrieve parameters:', error);
    return {};
  }
}

module.exports = getParameters;
Code Breakdown


Function: getParameters


    

  • async function that takes a single argument code of unknown type
    • 

  • Imports a module named select from the package antlr tree using the importer.import() function
    • 

  • Uses the imported select function to extract data from the provided code string
    • 

  • select function is called with three arguments:

      

    • A string or array of strings representing the XPath-like selectors to apply to the code
      • 

    • The code string
      • 

    • A string 'cpp' ( likely indicating the programming language of the code)
      • 

    • 

  • Returns the result of the select function
    • 



Exports


    

  • The getParameters function is exported as a module
    • 



Assumptions


    

  • The code is using a library or framework that provides an importer object to handle module imports
    • 

  • The select function is part of the antlr tree package and is used for extracting data from code
    • 

  • The code string is a snippet of source code in C++ (indicated by the 'cpp' argument)
    •