.. title:: clang-tidy - llvmlibc-callee-namespace
llvmlibc-callee-namespace
====================================
Checks all calls resolve to functions within correct namespace.
.. code-block:: c++
// Implementation inside the LIBC_NAMESPACE namespace.
// Correct if:
// - LIBC_NAMESPACE is a macro
// - LIBC_NAMESPACE expansion starts with `__llvm_libc`
namespace LIBC_NAMESPACE {
// Allow calls with the fully qualified name.
LIBC_NAMESPACE::strlen("hello");
// Allow calls to compiler provided functions.
(void)__builtin_abs(-1);
// Bare calls are allowed as long as they resolve to the correct namespace.
strlen("world");
// Disallow calling into functions in the global namespace.
::strlen("!");
} // namespace LIBC_NAMESPACE