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//===--- varargs_and_references.cc - test input file for iwyu -------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// When passing a class to a function that takes vararg arguments,
// compilers seem to require the full type information for the class
// (though the behavior is technically undefined). Test that IWYU
// notices this. (It only matters for references, of course.)
//
// TODO(csilvers): Clarify what the intended behavior here is; see discussion on
// OCL 23543695.
#include "tests/cxx/direct.h"
// Just to make things more complicated, put a default argument before
// the varargs.
int Function(int x, int y = 5, ...) { return 0; }
// To make things even *more* complicated, try a function pointer.
int (*function_p)(int, int, ...) = &Function;
int main() {
// IWYU: IndirectClass is...*indirect.h
IndirectClass ic;
// IWYU: IndirectClass needs a declaration
const IndirectClass& ref = ic;
// IWYU: IndirectClass is...*indirect.h
(void)sizeof(Function(1, 2, ref));
// IWYU: IndirectClass is...*indirect.h
(void)sizeof((*function_p)(1, 2, ref));
// IWYU: IndirectClass is...*indirect.h
(void)sizeof((*function_p)(1, 2, 3, 4, 5, ref));
}
/**** IWYU_SUMMARY
tests/cxx/varargs_and_references.cc should add these lines:
#include "tests/cxx/indirect.h"
tests/cxx/varargs_and_references.cc should remove these lines:
- #include "tests/cxx/direct.h" // lines XX-XX
The full include-list for tests/cxx/varargs_and_references.cc:
#include "tests/cxx/indirect.h" // for IndirectClass
***** IWYU_SUMMARY */
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