Basic protobuf example

remote_log/src/protocol.nim

@@ -0,0 +1,38 @@
+import protobuf, streams
+
+# Define protobuf spec and generate Nim code to use it
+const protoSpec = """
+syntax = "proto3";
+
+message ExampleMessage {
+  int32 number = 1;
+  string text = 2;
+  SubMessage nested = 3;
+  message SubMessage {
+    int32 a_field = 1;
+  }
+}
+"""
+parseProto(protoSpec)
+
+
+# Example follows:
+#--------------------------------------------------------
+# Create our message
+var msg = new ExampleMessage
+msg.number = 10
+msg.text = "Hello world"
+msg.nested = initExampleMessage_SubMessage(aField = 100)
+
+# Write it to a stream
+var stream = newStringStream()
+stream.write msg
+
+# Read the message from the stream and output the data, if it's all present
+stream.setPosition(0)
+var readMsg = stream.readExampleMessage()
+if readMsg.has(number, text, nested) and readMsg.nested.has(aField):
+  echo readMsg.number
+  echo readMsg.text
+  echo readMsg.nested.aField
+