readability-duplicate-include

Looks for duplicate includes and removes them. The check maintains a list of included files and looks for duplicates. If a macro is defined or undefined then the list of included files is cleared.

Examples:

#include <memory>
#include <vector>
#include <memory>

becomes

#include <memory>
#include <vector>

Because of the intervening macro definitions, this code remains unchanged:

#undef NDEBUG
#include "assertion.h"
// ...code with assertions enabled

#define NDEBUG
#include "assertion.h"
// ...code with assertions disabled

Options

IgnoredFilesList

A semicolon-separated list of regular expressions or filenames that are allowed to be included multiple times without diagnostics. Matching is performed against the textual include name. Default is an empty string.