dynatrace-cordova-outsystems-plugin/node_modules/lodash/_mergeData.js

This plugin gives you the ability to use the Dynatrace instrumentation in your hybrid application (Cordova, Ionic, ..). It uses the Mobile Agent, the JavaScript Agent and the Javascript Bridge. The Mobile Agent will give you all device specific values con

var composeArgs = require('./_composeArgs'),
    composeArgsRight = require('./_composeArgsRight'),
    replaceHolders = require('./_replaceHolders');

/** Used as the internal argument placeholder. */
var PLACEHOLDER = '__lodash_placeholder__';

/** Used to compose bitmasks for function metadata. */
var WRAP_BIND_FLAG = 1,
    WRAP_BIND_KEY_FLAG = 2,
    WRAP_CURRY_BOUND_FLAG = 4,
    WRAP_CURRY_FLAG = 8,
    WRAP_ARY_FLAG = 128,
    WRAP_REARG_FLAG = 256;

/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeMin = Math.min;

/**
 * Merges the function metadata of `source` into `data`.
 *
 * Merging metadata reduces the number of wrappers used to invoke a function.
 * This is possible because methods like `_.bind`, `_.curry`, and `_.partial`
 * may be applied regardless of execution order. Methods like `_.ary` and
 * `_.rearg` modify function arguments, making the order in which they are
 * executed important, preventing the merging of metadata. However, we make
 * an exception for a safe combined case where curried functions have `_.ary`
 * and or `_.rearg` applied.
 *
 * @private
 * @param {Array} data The destination metadata.
 * @param {Array} source The source metadata.
 * @returns {Array} Returns `data`.
 */
function mergeData(data, source) {
  var bitmask = data[1],
      srcBitmask = source[1],
      newBitmask = bitmask | srcBitmask,
      isCommon = newBitmask < (WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG | WRAP_ARY_FLAG);

  var isCombo =
    ((srcBitmask == WRAP_ARY_FLAG) && (bitmask == WRAP_CURRY_FLAG)) ||
    ((srcBitmask == WRAP_ARY_FLAG) && (bitmask == WRAP_REARG_FLAG) && (data[7].length <= source[8])) ||
    ((srcBitmask == (WRAP_ARY_FLAG | WRAP_REARG_FLAG)) && (source[7].length <= source[8]) && (bitmask == WRAP_CURRY_FLAG));

  // Exit early if metadata can't be merged.
  if (!(isCommon || isCombo)) {
    return data;
  }
  // Use source `thisArg` if available.
  if (srcBitmask & WRAP_BIND_FLAG) {
    data[2] = source[2];
    // Set when currying a bound function.
    newBitmask |= bitmask & WRAP_BIND_FLAG ? 0 : WRAP_CURRY_BOUND_FLAG;
  }
  // Compose partial arguments.
  var value = source[3];
  if (value) {
    var partials = data[3];
    data[3] = partials ? composeArgs(partials, value, source[4]) : value;
    data[4] = partials ? replaceHolders(data[3], PLACEHOLDER) : source[4];
  }
  // Compose partial right arguments.
  value = source[5];
  if (value) {
    partials = data[5];
    data[5] = partials ? composeArgsRight(partials, value, source[6]) : value;
    data[6] = partials ? replaceHolders(data[5], PLACEHOLDER) : source[6];
  }
  // Use source `argPos` if available.
  value = source[7];
  if (value) {
    data[7] = value;
  }
  // Use source `ary` if it's smaller.
  if (srcBitmask & WRAP_ARY_FLAG) {
    data[8] = data[8] == null ? source[8] : nativeMin(data[8], source[8]);
  }
  // Use source `arity` if one is not provided.
  if (data[9] == null) {
    data[9] = source[9];
  }
  // Use source `func` and merge bitmasks.
  data[0] = source[0];
  data[1] = newBitmask;

  return data;
}

module.exports = mergeData;