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// RUN: rm -rf %t
// RUN: mkdir %t
// RUN: split-file %s %t
//
// RUN: %clang_cc1 -std=c++20 -emit-module-interface %t/x.cppm -o %t/x.pcm
// RUN: %clang_cc1 -std=c++20 -emit-module-interface -fmodule-file=x=%t/x.pcm %t/x.y.cppm -o %t/x.y.pcm
// RUN: %clang_cc1 -std=c++20 -emit-module-interface %t/a.b.cppm -o %t/a.b.pcm
//
// RUN: %clang_cc1 -std=c++20 -I%t -fmodule-file=x.y=%t/x.y.pcm -fmodule-file=x=%t/x.pcm -verify %t/test.cpp \
// RUN: -DMODULE_NAME=z -DINTERFACE
// RUN: %clang_cc1 -std=c++20 -I%t -fmodule-file=x.y=%t/x.y.pcm -fmodule-file=x=%t/x.pcm \
// RUN: -fmodule-file=a.b=%t/a.b.pcm -verify %t/test.cpp -DMODULE_NAME=a.b
// RUN: %clang_cc1 -std=c++20 -I%t -fmodule-file=x.y=%t/x.y.pcm -fmodule-file=x=%t/x.pcm -verify %t/test.x.cpp
//--- x.cppm
export module x;
export int a, b;
//--- x.y.cppm
export module x.y;
export int c;
//--- a.b.cppm
export module a.b;
export int d;
//--- test.x.cpp
module x;
int use_1 = a; // ok
int use_2 = b; // ok
// There is no relation between module x and module x.y.
int use_3 = c; // expected-error {{use of undeclared identifier 'c'}}
//--- test.cpp
#ifdef INTERFACE
export module MODULE_NAME;
#else
module MODULE_NAME;
#endif
import x;
import x [[]];
import x [[foo]]; // expected-warning {{unknown attribute 'foo' ignored}}
import x [[noreturn]]; // expected-error {{'noreturn' attribute cannot be applied to a module import}}
import x [[blarg::noreturn]]; // expected-warning {{unknown attribute 'noreturn' ignored}}
import x.y;
import x.; // expected-error {{expected a module name after 'import'}}
import .x; // expected-error {{expected a module name after 'import'}}
import blarg; // expected-error {{module 'blarg' not found}}
int use_4 = c; // ok
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