generate: Add PDL language structures

generate/protocol.go

@@ -0,0 +1,47 @@
+package generate
+
+type Protocol struct {
+	Messages map[uint16] Message
+	Types    map[string] Type
+}
+
+type Message struct {
+	Name string
+	Type Type
+}
+
+type Type interface {
+	
+}
+
+type TypeInt struct {
+	Bits   int
+	Signed bool
+}
+
+type TypeFloat struct {
+	Bits int
+}
+
+type TypeString struct { }
+
+type TypeBuffer struct { }
+
+type TypeArray struct {
+	Element Type
+}
+
+type TypeTable struct { }
+
+type TypeTableDefined struct {
+	Fields map[uint16] Field
+}
+
+type Field struct {
+	Name string
+	Type Type
+}
+
+type TypeNamed struct {
+	Name string
+}