cfg: New module

Reads config files

1 files changed, 40 insertions, 0 deletions

diff --git a/src/cfg.hh b/src/cfg.hh
new file mode 100644
index 0000000..a4a7865
--- /dev/null
+++ b/src/cfg.hh
@@ -0,0 +1,40 @@
+#ifndef CFG_HH
+#define CFG_HH
+
+#include <memory>
+#include <optional>
+#include <string_view>
+#include <vector>
+
+namespace cfg {
+
+class Config {
+ public:
+  virtual ~Config() = default;
+
+  [[nodiscard]]
+  virtual std::optional<std::string_view> get(std::string_view name) const = 0;
+
+  [[nodiscard]]
+  bool has(std::string_view name) const;
+  [[nodiscard]]
+  std::optional<int64_t> get_int64(std::string_view name) const;
+  [[nodiscard]]
+  std::optional<uint64_t> get_uint64(std::string_view name) const;
+  [[nodiscard]]
+  std::optional<bool> get_bool(std::string_view name) const;
+
+  [[nodiscard]]
+  static std::unique_ptr<Config> load(std::string_view name,
+                                      std::vector<std::string>& errors);
+
+ protected:
+  Config() = default;
+
+  Config(Config const&) = delete;
+  Config& operator=(Config const&) = delete;
+};
+
+}  // namespace cfg
+
+#endif  // CFG_HH