Add error-code constructors for file (#144)

Add:
- `file::file(std::error_code&)`
- `file::file(std::string_view, std::error_code&)`
- `file::file(std::string_view, std::string_view, std::error_code&)`
- `file::text(std::error_code&)`
- `file::text(std::string_view, std::error_code&)`
- `file::text(std::string_view, std::string_view, std::error_code&)`

include/tmp/file

@@ -46,12 +46,30 @@ class TMP_EXPORT file : public entry {
 public:
   /// Creates a unique temporary file and opens it for reading and writing
   /// in binary mode
-  /// @param label     A label to attach to the temporary file path
-  /// @param extension An extension of the temporary file path
+  /// @param[in] label     A label to attach to the temporary file path
+  /// @param[in] extension An extension of the temporary file path
   /// @throws std::filesystem::filesystem_error if cannot create a file
   /// @throws std::invalid_argument             if arguments are ill-formatted
   explicit file(std::string_view label = "", std::string_view extension = "");
 
+  /// Creates a unique temporary file and opens it for reading and writing
+  /// in binary mode
+  /// @param[out] ec Parameter for error reporting
+  explicit file(std::error_code& ec);
+
+  /// Creates a unique temporary file and opens it for reading and writing
+  /// in binary mode
+  /// @param[in]  label A label to attach to the temporary file path
+  /// @param[out] ec    Parameter for error reporting
+  file(std::string_view label, std::error_code& ec);
+
+  /// Creates a unique temporary file and opens it for reading and writing
+  /// in binary mode
+  /// @param[in]  label     A label to attach to the temporary file path
+  /// @param[in]  extension An extension of the temporary file path
+  /// @param[out] ec        Parameter for error reporting
+  file(std::string_view label, std::string_view extension, std::error_code& ec);
+
   /// Creates a unique temporary file and opens it for reading and writing
   /// in text mode
   /// @param label     A label to attach to the temporary file path
@@ -61,6 +79,25 @@ public:
   static file text(std::string_view label = "",
                    std::string_view extension = "");
 
+  /// Creates a unique temporary file and opens it for reading and writing
+  /// in text mode
+  /// @param[out] ec Parameter for error reporting
+  static file text(std::error_code& ec);
+
+  /// Creates a unique temporary file and opens it for reading and writing
+  /// in text mode
+  /// @param[in]  label A label to attach to the temporary file path
+  /// @param[out] ec    Parameter for error reporting
+  static file text(std::string_view label, std::error_code& ec);
+
+  /// Creates a unique temporary file and opens it for reading and writing
+  /// in text mode
+  /// @param[in]  label     A label to attach to the temporary file path
+  /// @param[in]  extension An extension of the temporary file path
+  /// @param[out] ec        Parameter for error reporting
+  static file text(std::string_view label, std::string_view extension,
+                   std::error_code& ec);
+
   /// Creates a unique temporary copy from the given path
   /// @param path      A path to make a temporary copy from
   /// @param label     A label to attach to the temporary file path

src/file.cpp

@@ -111,13 +111,42 @@ file::file(std::string_view label, std::string_view extension)
     : entry(create_file(label, extension)),
       binary(true) {}
 
+file::file(std::error_code& ec)
+    : entry(create_file("", "", ec)),
+      binary(true) {}
+
+file::file(std::string_view label, std::error_code& ec)
+    : entry(create_file(label, "", ec)),
+      binary(true) {}
+
+file::file(std::string_view label, std::string_view extension,
+           std::error_code& ec)
+    : entry(create_file(label, extension, ec)),
+      binary(true) {}
+
 file file::text(std::string_view label, std::string_view extension) {
   file result = file(label, extension);
   result.binary = false;
 
   return result;
 }
 
+file file::text(std::error_code& ec) {
+  return text("", ec);
+}
+
+file file::text(std::string_view label, std::error_code& ec) {
+  return text(label, "", ec);
+}
+
+file file::text(std::string_view label, std::string_view extension,
+                std::error_code& ec) {
+  file result = file(label, extension, ec);
+  result.binary = false;
+
+  return result;
+}
+
 file file::copy(const fs::path& path, std::string_view label,
                 std::string_view extension) {
   file tmpfile = file(label, extension);