CodeQL library for C/C++

codeql/cpp-all 6.0.1-dev (changelog, source)

Module MultipleInclusion

Provides definitions related to include guards: techniques for preventing multiple inclusion of header files.

Import path

import semmle.code.cpp.headers.MultipleInclusion

Imports

cpp	Provides classes and predicates for working with C/C++ code.

Predicates

correctIncludeGuard	Holds if `hf` uses a valid include guard with the macro named `includeGuard` and the preprocessor directives `ifndef`, `define`, and `endif`. This analysis is also exposed in an object-oriented style through the class `CorrectIncludeGuard`.
endsWithEndif	Holds if `hf` ends with `endif`.
hasIncludeGuard	Holds if `hf` begins with an `#ifndef` or `#if` directive `ifndef`, to test the macro named `includeGuard`, and ends with the matching `endif`.
ifndefDirective	Holds if `ppd` is effectively an `#ifndef` directive that tests `macro`. This includes `#if !defined(macro)`.
startsWithIfndef	Holds if `hf` begins with an `#ifndef` or `#if` directive `ifndef`, to test the macro named `macroName`.

Classes

BadIncludeGuard	A header file that uses a non-portable mechanism to prevent multiple inclusion.
CorrectIncludeGuard	A header file with the correct include guard: `#ifndef` (or equivalent), `#define`, and `#endif`.
EmptyFile	A file with no code in it.
IncludeGuardedHeader	A header file with an include guard.
PragmaOnceIncludeGuard	A header file with the `#pragma once` include guard.