Function reduceToSingleString

lib/internal/util/inspect.js:2638–2699

(
  ctx, output, base, braces, extrasType, recurseTimes, value)

}

function reduceToSingleString(
  ctx, output, base, braces, extrasType, recurseTimes, value) {
  if (ctx.compact !== true) {
    if (typeof ctx.compact === 'number' && ctx.compact >= 1) {
      // Memorize the original output length. In case the output is grouped,
      // prevent lining up the entries on a single line.
      const entries = output.length;
      // Group array elements together if the array contains at least six
      // separate entries.
      if (extrasType === kArrayExtrasType && entries > 6) {
        output = groupArrayElements(ctx, output, value);
      }
      // `ctx.currentDepth` is set to the most inner depth of the currently
      // inspected object part while `recurseTimes` is the actual current depth
      // that is inspected.
      //
      // Example:
      //
      // const a = { first: [ 1, 2, 3 ], second: { inner: [ 1, 2, 3 ] } }
      //
      // The deepest depth of `a` is 2 (a.second.inner) and `a.first` has a max
      // depth of 1.
      //
      // Consolidate all entries of the local most inner depth up to
      // `ctx.compact`, as long as the properties are smaller than
      // `ctx.breakLength`.
      if (ctx.currentDepth - recurseTimes < ctx.compact &&
          entries === output.length) {
        // Line up all entries on a single line in case the entries do not
        // exceed `breakLength`. Add 10 as constant to start next to all other
        // factors that may reduce `breakLength`.
        const start = output.length + ctx.indentationLvl +
                      braces[0].length + base.length + 10;
        if (isBelowBreakLength(ctx, output, start, base)) {
          const joinedOutput = join(output, ', ');
          if (!StringPrototypeIncludes(joinedOutput, '\n')) {
            return `${base ? `${base} ` : ''}${braces[0]} ${joinedOutput}` +
              ` ${braces[1]}`;
          }
        }
      }
    }
    // Line up each entry on an individual line.
    const indentation = `\n${StringPrototypeRepeat(' ', ctx.indentationLvl)}`;
    return `${base ? `${base} ` : ''}${braces[0]}${indentation}  ` +
      `${join(output, `,${indentation}  `)}${indentation}${braces[1]}`;
  }
  // Line up all entries on a single line in case the entries do not exceed
  // `breakLength`.
  if (isBelowBreakLength(ctx, output, 0, base)) {
    return `${braces[0]}${base ? ` ${base}` : ''} ${join(output, ', ')} ` +
      braces[1];
  }
  const indentation = StringPrototypeRepeat(' ', ctx.indentationLvl);
  // If the opening "brace" is too large, like in the case of "Set {",
  // we need to force the first item to be on the next line or the
  // items will not line up correctly.
  const ln = base === '' && braces[0].length === 1 ?