Initial pure C++ implementation

src/foundation/mini_json.h

@@ -0,0 +1,25 @@
+
+#pragma once
+
+#include <string>
+#include <utility>
+#include <vector>
+
+namespace joc::json {
+
+struct Member {
+    std::string key;
+    std::string raw;
+    bool is_string = false;
+};
+
+// Parses a top-level JSON object.  Rejects non-objects and duplicate keys.
+bool parse_object(const std::string& text, std::vector<Member>* out, std::string* error);
+
+const Member* find(const std::vector<Member>& members, const std::string& key);
+
+bool as_string(const Member& member, std::string* out);
+bool as_number(const Member& member, double* out);
+bool as_integer(const Member& member, long long* out);
+
+}  // namespace joc::json