posix: add tempfile()

1 files changed, 34 insertions, 0 deletions

diff --git a/nihil.posix/posix.rename.cc b/nihil.posix/posix.rename.cc
new file mode 100644
index 0000000..9203d08
--- /dev/null
+++ b/nihil.posix/posix.rename.cc
@@ -0,0 +1,34 @@
+/*
+ * This source code is released into the public domain.
+ */
+
+module;
+
+#include <expected>
+#include <filesystem>
+
+module nihil.posix;
+
+import nihil.error;
+
+namespace nihil {
+
+/*
+ * Rename a file.
+ */
+auto rename_file(std::filesystem::path const &oldp,
+		 std::filesystem::path const &newp)
+	-> std::expected<void, error>
+{
+	auto err = std::error_code();
+
+	std::filesystem::rename(oldp, newp, err);
+
+	if (err)
+		return std::unexpected(error(err));
+
+	return {};
+}
+
+
+} // namespace nihil