Debug mode for string. This commit also marks the first time libc++ debug-mode has found a bug (found one in regex). Had to play with extern templates a bit to get this to work since string is heavily used within libc++.dylib.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@189114 91177308-0d34-0410-b5e6-96231b3b80d8

test/strings/basic.string/string.modifiers/string_erase/erase_iter_db1.pass.cpp

@@ -0,0 +1,50 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <string>
+
+// Call erase(const_iterator position) with end()
+
+#if _LIBCPP_DEBUG2 >= 1
+
+#define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : std::exit(0))
+
+#include <string>
+#include <cassert>
+#include <cstdlib>
+#include <exception>
+
+#include "../../min_allocator.h"
+
+int main()
+{
+    {
+    std::string l1("123");
+    std::string::const_iterator i = l1.end();
+    l1.erase(i);
+    assert(false);
+    }
+#if __cplusplus >= 201103L
+    {
+    typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
+    S l1("123");
+    S::const_iterator i = l1.end();
+    l1.erase(i);
+    assert(false);
+    }
+#endif
+}
+
+#else
+
+int main()
+{
+}
+
+#endif

test/strings/basic.string/string.modifiers/string_erase/erase_iter_db2.pass.cpp

@@ -0,0 +1,52 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <string>
+
+// Call erase(const_iterator position) with iterator from another container
+
+#if _LIBCPP_DEBUG2 >= 1
+
+#define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : std::exit(0))
+
+#include <string>
+#include <cassert>
+#include <cstdlib>
+#include <exception>
+
+#include "../../min_allocator.h"
+
+int main()
+{
+    {
+    std::string l1("123");
+    std::string l2("123");
+    std::string::const_iterator i = l2.begin();
+    l1.erase(i);
+    assert(false);
+    }
+#if __cplusplus >= 201103L
+    {
+    typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
+    S l1("123");
+    S l2("123");
+    S::const_iterator i = l2.begin();
+    l1.erase(i);
+    assert(false);
+    }
+#endif
+}
+
+#else
+
+int main()
+{
+}
+
+#endif

test/strings/basic.string/string.modifiers/string_erase/erase_iter_iter_db1.pass.cpp

@@ -0,0 +1,50 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <string>
+
+// Call erase(const_iterator first, const_iterator last); with first iterator from another container
+
+#if _LIBCPP_DEBUG2 >= 1
+
+#define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : std::exit(0))
+
+#include <string>
+#include <cassert>
+#include <exception>
+#include <cstdlib>
+
+#include "../../min_allocator.h"
+
+int main()
+{
+    {
+    std::string l1("123");
+    std::string l2("123");
+    std::string::iterator i = l1.erase(l2.cbegin(), l1.cbegin()+1);
+    assert(false);
+    }
+#if __cplusplus >= 201103L
+    {
+    typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
+    S l1("123");
+    S l2("123");
+    S::iterator i = l1.erase(l2.cbegin(), l1.cbegin()+1);
+    assert(false);
+    }
+#endif
+}
+
+#else
+
+int main()
+{
+}
+
+#endif

test/strings/basic.string/string.modifiers/string_erase/erase_iter_iter_db2.pass.cpp

@@ -0,0 +1,50 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <string>
+
+// Call erase(const_iterator first, const_iterator last); with second iterator from another container
+
+#if _LIBCPP_DEBUG2 >= 1
+
+#define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : std::exit(0))
+
+#include <string>
+#include <cassert>
+#include <exception>
+#include <cstdlib>
+
+#include "../../min_allocator.h"
+
+int main()
+{
+    {
+    std::string l1("123");
+    std::string l2("123");
+    std::string::iterator i = l1.erase(l1.cbegin(), l2.cbegin()+1);
+    assert(false);
+    }
+#if __cplusplus >= 201103L
+    {
+    typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
+    S l1("123");
+    S l2("123");
+    S::iterator i = l1.erase(l1.cbegin(), l2.cbegin()+1);
+    assert(false);
+    }
+#endif
+}
+
+#else
+
+int main()
+{
+}
+
+#endif

test/strings/basic.string/string.modifiers/string_erase/erase_iter_iter_db3.pass.cpp

@@ -0,0 +1,50 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <string>
+
+// Call erase(const_iterator first, const_iterator last); with both iterators from another container
+
+#if _LIBCPP_DEBUG2 >= 1
+
+#define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : std::exit(0))
+
+#include <string>
+#include <cassert>
+#include <exception>
+#include <cstdlib>
+
+#include "../../min_allocator.h"
+
+int main()
+{
+    {
+    std::string l1("123");
+    std::string l2("123");
+    std::string::iterator i = l1.erase(l2.cbegin(), l2.cbegin()+1);
+    assert(false);
+    }
+#if __cplusplus >= 201103L
+    {
+    typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
+    S l1("123");
+    S l2("123");
+    S::iterator i = l1.erase(l2.cbegin(), l2.cbegin()+1);
+    assert(false);
+    }
+#endif
+}
+
+#else
+
+int main()
+{
+}
+
+#endif

test/strings/basic.string/string.modifiers/string_erase/erase_iter_iter_db4.pass.cpp

@@ -0,0 +1,48 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <string>
+
+// Call erase(const_iterator first, const_iterator last); with a bad range
+
+#if _LIBCPP_DEBUG2 >= 1
+
+#define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : std::exit(0))
+
+#include <string>
+#include <cassert>
+#include <exception>
+#include <cstdlib>
+
+#include "../../min_allocator.h"
+
+int main()
+{
+    {
+    std::string l1("123");
+    std::string::iterator i = l1.erase(l1.cbegin()+1, l1.cbegin());
+    assert(false);
+    }
+#if __cplusplus >= 201103L
+    {
+    typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
+    S l1("123");
+    S::iterator i = l1.erase(l1.cbegin()+1, l1.cbegin());
+    assert(false);
+    }
+#endif
+}
+
+#else
+
+int main()
+{
+}
+
+#endif

test/strings/basic.string/string.modifiers/string_erase/pop_back.pass.cpp

@@ -11,6 +11,10 @@
 
 // void pop_back();
 
+#if _LIBCPP_DEBUG2 >= 1
+#define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : std::exit(0))
+#endif
+
 #include <string>
 #include <cassert>
 
@@ -41,4 +45,11 @@ int main()
     test(S("abcdefghijklmnopqrst"), S("abcdefghijklmnopqrs"));
     }
 #endif
+#if _LIBCPP_DEBUG2 >= 1
+    {
+        std::string s;
+        s.pop_back();
+        assert(false);
+    }
+#endif        
 }