Set expression type for enumeration values

Rakefile

@@ -40,43 +40,19 @@ end
 
 desc 'Convert previous stage language into the current stage language'
 task :convert do
-  File.open('boot/stage16.elna', 'w') do |current_stage|
-    skip = false
-
-    File.readlines('boot/stage15.elna').each do |line|
-      if line.strip == 'type'
-        current_stage << <<~SNIP
-          type
-          	_elna_tac_declaration = record
-          		next: Word;
-          		name: Word;
-          		length: Word;
-          		body: Word
-          	end;
-		_integer_literal_node = record
-			kind: Word;
-			value: Word;
-			length: Word
-		end;
-        SNIP
-      elsif line.start_with?('proc _elna_tac_declaration_size')
-        skip = true
-      elsif line.start_with?('proc _elna_tac_declaration_get_')
-        skip = true
-      elsif line.start_with?('proc _elna_tac_declaration_set_')
-        skip = true
-      elsif line.start_with?('proc _integer_literal_node_size')
-        skip = true
-      elsif line.start_with?('proc _integer_literal_node_get_')
-        skip = true
-      elsif line.start_with?('proc _integer_literal_node_set_')
-        skip = true
-      elsif line.start_with?('end') && skip
-        skip = false
-      elsif !skip
+  File.open('boot/stage17/cl.elna', 'w') do |current_stage|
+    File.readlines('boot/stage16/cl.elna').each do |line|
         current_stage << line
-      end
     end
+    current_stage << <<~STAGE
+
+      proc f(x: ElnaTreeExpression);
+      var
+      	y: Word;
+      begin
+      	y := x.kind
+      end;
+    STAGE
   end
 end