Web Reference: If you have large objects, pass them by const reference or const pointer. If you want to modify the object that is passed to the function, use a reference or a pointer. Jul 23, 2025 · In the “pass by const reference” technique, a const reference to the original argument is passed. This means that we cannot modify the actual parameters within the function. By using a reference, we avoid making a copy of the argument, so we can also pass large objects or parameters to functions. Nov 1, 2023 · While const references are very useful, some of the nuances around declaring and using them can be confusing at first. In this comprehensive guide, we‘ll unpack everything you need to know to effectively utilize const references in your C++ projects.
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