feat(cpp-object-oriented-modular-refactoring): step 3 - foundation-google-style

include/fesa/core/source_identity.h

@@ -0,0 +1,26 @@
+#ifndef FESA_CORE_SOURCE_IDENTITY_H_
+#define FESA_CORE_SOURCE_IDENTITY_H_
+
+#include <cstddef>
+#include <cstdint>
+#include <filesystem>
+#include <string>
+
+namespace fesa {
+
+/// @brief Identifies the input location that produced an item or diagnostic.
+struct SourceLocation {
+  std::filesystem::path file;
+  std::size_t line;
+};
+
+/// @brief Preserves semantic and raw-text forms of a source entity identity.
+struct SourceEntityId {
+  std::string instance_name;
+  std::int64_t source_label;
+  std::string source_label_text;
+};
+
+}  // namespace fesa
+
+#endif  // FESA_CORE_SOURCE_IDENTITY_H_