summaryrefslogtreecommitdiff
path: root/boost/outcome/experimental/result.h
diff options
context:
space:
mode:
Diffstat (limited to 'boost/outcome/experimental/result.h')
-rw-r--r--boost/outcome/experimental/result.h82
1 files changed, 82 insertions, 0 deletions
diff --git a/boost/outcome/experimental/result.h b/boost/outcome/experimental/result.h
new file mode 100644
index 0000000000..dd06ce4b68
--- /dev/null
+++ b/boost/outcome/experimental/result.h
@@ -0,0 +1,82 @@
+/* C interface for result
+(C) 2017-2019 Niall Douglas <http://www.nedproductions.biz/> (59 commits)
+File Created: Aug 2017
+
+
+Boost Software License - Version 1.0 - August 17th, 2003
+
+Permission is hereby granted, free of charge, to any person or organization
+obtaining a copy of the software and accompanying documentation covered by
+this license (the "Software") to use, reproduce, display, distribute,
+execute, and transmit the Software, and to prepare derivative works of the
+Software, and to permit third-parties to whom the Software is furnished to
+do so, all subject to the following:
+
+The copyright notices in the Software and this entire statement, including
+the above license grant, this restriction and the following disclaimer,
+must be included in all copies of the Software, in whole or in part, and
+all derivative works of the Software, unless such copies or derivative
+works are solely in the form of machine-executable object code generated by
+a source language processor.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
+SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
+FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
+*/
+
+#ifndef BOOST_OUTCOME_EXPERIMENTAL_RESULT_H
+#define BOOST_OUTCOME_EXPERIMENTAL_RESULT_H
+
+#include <stdint.h> // for intptr_t
+
+#define BOOST_OUTCOME_C_DECLARE_RESULT(ident, R, S) \
+ struct cxx_result_##ident \
+ { \
+ R value; \
+ unsigned flags; \
+ S error; \
+ }
+
+#define BOOST_OUTCOME_C_RESULT(ident) struct cxx_result_##ident
+
+
+#define BOOST_OUTCOME_C_RESULT_HAS_VALUE(r) (((r).flags & 1U) == 1U)
+
+#define BOOST_OUTCOME_C_RESULT_HAS_ERROR(r) (((r).flags & 2U) == 2U)
+
+#define BOOST_OUTCOME_C_RESULT_ERROR_IS_ERRNO(r) (((r).flags & (1U << 4U)) == (1U << 4U))
+
+
+/***************************** <system_error2> support ******************************/
+
+#define BOOST_OUTCOME_C_DECLARE_STATUS_CODE(ident, value_type) \
+ struct cxx_status_code_##ident \
+ { \
+ void *domain; \
+ value_type value; \
+ };
+
+#define BOOST_OUTCOME_C_STATUS_CODE(ident) struct cxx_status_code_##ident
+
+
+struct cxx_status_code_posix
+{
+ void *domain;
+ int value;
+};
+#define BOOST_OUTCOME_C_DECLARE_RESULT_ERRNO(ident, R) BOOST_OUTCOME_C_DECLARE_RESULT(posix_##ident, R, struct cxx_status_code_posix)
+#define BOOST_OUTCOME_C_RESULT_ERRNO(ident) BOOST_OUTCOME_C_RESULT(posix_##ident)
+
+struct cxx_status_code_system
+{
+ void *domain;
+ intptr_t value;
+};
+#define BOOST_OUTCOME_C_DECLARE_RESULT_SYSTEM(ident, R) BOOST_OUTCOME_C_DECLARE_RESULT(system_##ident, R, struct cxx_status_code_system)
+#define BOOST_OUTCOME_C_RESULT_SYSTEM(ident) BOOST_OUTCOME_C_RESULT(system_##ident)
+
+#endif