Reorganize C++ tests for stdbool and stdbool-c99.

* tests/test-stdbool-c++.cc: Don't include <stdbool.h> if TEST_STDBOOL_H
is not defined. Add a couple of simple tests, from test-stdbool.c.
* tests/test-stdbool-c99-c++.cc: New file.
* modules/stdbool-c99-c++-tests: New file, based on
modules/stdbool-c++-tests.
* modules/stdbool-c99-tests (Depends-on): Add stdbool-c99-c++-tests.
Remove stdbool-c++-tests.
* modules/stdbool-tests (Depends-on): Add stdbool-c++-tests.

ChangeLog

@@ -1,3 +1,15 @@
+2022-09-10  Bruno Haible  <bruno@clisp.org>
+
+	Reorganize C++ tests for stdbool and stdbool-c99.
+	* tests/test-stdbool-c++.cc: Don't include <stdbool.h> if TEST_STDBOOL_H
+	is not defined. Add a couple of simple tests, from test-stdbool.c.
+	* tests/test-stdbool-c99-c++.cc: New file.
+	* modules/stdbool-c99-c++-tests: New file, based on
+	modules/stdbool-c++-tests.
+	* modules/stdbool-c99-tests (Depends-on): Add stdbool-c99-c++-tests.
+	Remove stdbool-c++-tests.
+	* modules/stdbool-tests (Depends-on): Add stdbool-c++-tests.
+
 2022-09-10  Bruno Haible  <bruno@clisp.org>
 
 	stdbool C++ tests: Fix for C++20.

modules/stdbool-c99-c++-tests

@@ -0,0 +1,19 @@
+Files:
+tests/test-stdbool-c99-c++.cc
+tests/test-stdbool-c++.cc
+tests/test-stdbool-c++2.cc
+
+Status:
+c++-test
+
+Depends-on:
+ansi-c++-opt
+
+configure.ac:
+
+Makefile.am:
+if ANSICXX
+TESTS += test-stdbool-c99-c++
+check_PROGRAMS += test-stdbool-c99-c++
+test_stdbool_c99_c___SOURCES = test-stdbool-c99-c++.cc test-stdbool-c++2.cc
+endif

modules/stdbool-c99-tests

@@ -1,9 +1,9 @@
 Files:
-tests/test-stdbool.c
 tests/test-stdbool-c99.c
+tests/test-stdbool.c
 
 Depends-on:
-stdbool-c++-tests
+stdbool-c99-c++-tests
 
 configure.ac:
 

modules/stdbool-tests

@@ -2,6 +2,7 @@ Files:
 tests/test-stdbool.c
 
 Depends-on:
+stdbool-c++-tests
 
 configure.ac:
 

tests/test-stdbool-c++.cc

@@ -19,7 +19,26 @@
 #define GNULIB_NAMESPACE gnulib
 #include <config.h>
 
-#include <stdbool.h>
+#ifdef TEST_STDBOOL_H
+# include <stdbool.h>
+#endif
+
+
+/* These tests are a subset of the C language tests in test-stdbool.c.  */
+
+#if false
+ "error: false is not 0"
+#endif
+#if true != 1
+ "error: true is not 1"
+#endif
+
+struct s { bool s: 1; bool t; } s;
+
+char a[true == 1 ? 1 : -1];
+char b[false == 0 ? 1 : -1];
+char c[(unsigned char) true == 1 ? 1 : -1];
+char d[(unsigned char) false == 0 ? 1 : -1];
 
 
 int

tests/test-stdbool-c99-c++.cc

@@ -0,0 +1,2 @@
+#define TEST_STDBOOL_H
+#include "test-stdbool-c++.cc"