59179d72b2
Currently the C++20 concepts are only merged in `ASTReader`, i.e. when coming from different TU. This can causes ambiguious reference errors when trying to access the same concept that should otherwise be merged. Please see the added test for an example. Note that we currently use `ASTContext::isSameEntity` to check for ODR violations. However, it will not check that concept requirements match. The same issue holds for mering concepts from different TUs, I added a FIXME and filed a GH issue to track this: https://github.com/llvm/llvm-project/issues/56310 Reviewed By: ChuanqiXu Differential Revision: https://reviews.llvm.org/D128921
65 lines
1.1 KiB
C++
65 lines
1.1 KiB
C++
// RUN: rm -rf %t
|
|
// RUN: mkdir %t
|
|
// RUN: split-file %s %t
|
|
//
|
|
// RUN: %clang_cc1 -xc++ -std=c++20 -fmodules -fmodule-name=library \
|
|
// RUN: -emit-module %t/modules.map \
|
|
// RUN: -o %t/module.pcm
|
|
//
|
|
//
|
|
// RUN: %clang_cc1 -xc++ -std=c++20 -fmodules -fmodule-file=%t/module.pcm \
|
|
// RUN: -fmodule-map-file=%t/modules.map \
|
|
// RUN: -fsyntax-only -verify %t/use.cpp
|
|
//
|
|
//--- use.cpp
|
|
// expected-no-diagnostics
|
|
|
|
#include "concepts.h"
|
|
#include "format.h"
|
|
|
|
template <class T> void foo()
|
|
requires same_as<T, T>
|
|
{}
|
|
|
|
//--- modules.map
|
|
module "library" {
|
|
export *
|
|
module "concepts" {
|
|
export *
|
|
header "concepts.h"
|
|
}
|
|
module "format" {
|
|
export *
|
|
header "format.h"
|
|
}
|
|
}
|
|
|
|
//--- concepts.h
|
|
#ifndef SAMEAS_CONCEPTS_H_
|
|
#define SAMEAS_CONCEPTS_H_
|
|
|
|
#include "same_as.h"
|
|
|
|
#endif // SAMEAS_CONCEPTS_H
|
|
|
|
//--- same_as.h
|
|
#ifndef SAME_AS_H
|
|
#define SAME_AS_H
|
|
|
|
template <class T, class U>
|
|
concept same_as = __is_same(T, U);
|
|
|
|
#endif // SAME_AS_H
|
|
|
|
//--- format.h
|
|
#ifndef FORMAT_H
|
|
#define FORMAT_H
|
|
|
|
#include "concepts.h"
|
|
#include "same_as.h"
|
|
|
|
template <class T> void foo()
|
|
requires same_as<T, int>
|
|
{}
|
|
|
|
#endif // FORMAT_H
|