hamzasood created this revision.
hamzasood added reviewers: EricWF, mclow.lists, rsmith.
Herald added subscribers: cfe-commits, ldionne, christof.
This patch adds the library components needed for contracts in C++2a.
The wording says that a contract_violation object is populated in an
implementation-defined manner. A private constructor that the compiler can call
seems like the most sensible (and obvious) solution.
Repository:
rCXX libc++
https://reviews.llvm.org/D49647
Files:
include/contract
include/module.modulemap
test/libcxx/double_include.sh.cpp
test/libcxx/language.support/support.contract/version.pass.cpp
Index: test/libcxx/language.support/support.contract/version.pass.cpp
===================================================================
--- test/libcxx/language.support/support.contract/version.pass.cpp
+++ test/libcxx/language.support/support.contract/version.pass.cpp
@@ -0,0 +1,20 @@
+//===----------------------------------------------------------------------===//
+//
+// 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.
+//
+//===----------------------------------------------------------------------===//
+
+// <contract>
+
+#include <contract>
+
+#ifndef _LIBCPP_VERSION
+#error _LIBCPP_VERSION not defined
+#endif
+
+int main()
+{
+}
Index: test/libcxx/double_include.sh.cpp
===================================================================
--- test/libcxx/double_include.sh.cpp
+++ test/libcxx/double_include.sh.cpp
@@ -45,6 +45,7 @@
#include <complex>
#include <complex.h>
#include <condition_variable>
+#include <contract>
#include <csetjmp>
#include <csignal>
#include <cstdarg>
Index: include/module.modulemap
===================================================================
--- include/module.modulemap
+++ include/module.modulemap
@@ -255,6 +255,10 @@
header "condition_variable"
export *
}
+ module contract {
+ header "contract"
+ export *
+ }
module deque {
header "deque"
export initializer_list
Index: include/contract
===================================================================
--- include/contract
+++ include/contract
@@ -0,0 +1,67 @@
+// -*- C++ -*-
+//===------------------------------ contract ------------------------------===//
+//
+// 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.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _LIBCPP_CONTRACT
+#define _LIBCPP_CONTRACT
+
+/*
+ contract synopsis
+
+namespace std {
+ class contract_violation {
+ public:
+ uint_least32_t line_number() const noexcept;
+ string_view file_name() const noexcept;
+ string_view function_name() const noexcept;
+ string_view comment() const noexcept;
+ string_view assertion_level() const noexcept;
+ };
+}
+*/
+
+#include <__config>
+#include <cstdint>
+#include <string_view>
+
+#ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
+#pragma GCC system_header
+#endif
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+#if _LIBCPP_STD_VER > 17
+
+class contract_violation {
+public:
+ _LIBCPP_INLINE_VISIBILITY uint_least32_t line_number() const noexcept { return __line_number; }
+ _LIBCPP_INLINE_VISIBILITY string_view file_name() const noexcept { return __file_name; }
+ _LIBCPP_INLINE_VISIBILITY string_view function_name() const noexcept { return __function_name; }
+ _LIBCPP_INLINE_VISIBILITY string_view comment() const noexcept { return __comment; }
+ _LIBCPP_INLINE_VISIBILITY string_view assertion_level() const noexcept { return __assertion_level; }
+
+private:
+ _LIBCPP_INLINE_VISIBILITY
+ constexpr contract_violation(uint_least32_t __line, string_view __file, string_view __fn,
+ string_view __comment, string_view __lvl) noexcept
+ : __line_number(__line), __file_name(__file), __function_name(__fn),
+ __comment(__comment), __assertion_level(__lvl) {}
+
+ uint_least32_t __line_number;
+ string_view __file_name;
+ string_view __function_name;
+ string_view __comment;
+ string_view __assertion_level;
+};
+
+#endif // _LIBCPP_STD_VER > 17
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // _LIBCPP_CONTRACT
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