From ce5c689a5f9e544d724b2a41fda2f752ccc4a4ae Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Fri, 7 May 2021 20:50:48 +0100
Subject: Initial commit where writing objects back out to JSON

It's not perfect, writes explicit nulls, doesn't do shared @id
---
 lib/jsonParse-persistence.h | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

(limited to 'lib/jsonParse-persistence.h')

diff --git a/lib/jsonParse-persistence.h b/lib/jsonParse-persistence.h
index 6449f7b..edb5305 100644
--- a/lib/jsonParse-persistence.h
+++ b/lib/jsonParse-persistence.h
@@ -7,6 +7,7 @@
 #include <iosfwd>
 #include <memory>
 #include <string>
+#include <string_view>
 
 namespace Persistence {
 	class JsonParsePersistence : public json::jsonParser {
@@ -39,6 +40,33 @@ namespace Persistence {
 		template<typename T> inline void pushValue(T && value);
 		inline SelectionPtr & current();
 	};
+
+	class JsonWritePersistence : public Writer {
+	public:
+		explicit JsonWritePersistence(std::ostream & s);
+
+		template<typename T>
+		inline void
+		saveState(T & t) const
+		{
+			SelectionT<T> {t}.write(*this);
+		}
+
+	protected:
+		void beginObject() const override;
+		void beginArray() const override;
+		void pushValue(bool value) const override;
+		void pushValue(float value) const override;
+		void pushValue(std::nullptr_t) const override;
+		void pushValue(const std::string_view value) const override;
+		void nextValue() const override;
+		void pushKey(const std::string_view k) const override;
+		void endArray() const override;
+		void endObject() const override;
+
+	private:
+		std::ostream & strm;
+	};
 }
 
 #endif
-- 
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