Generate record accessors automatically

Rakefile

@@ -41,17 +41,43 @@ end
 
 desc 'Convert previous stage language into the current stage language'
 task :convert do
-  File.open('boot/stage14.elna', 'w') do |current_stage|
-    previous_line = nil
+  File.open('boot/stage16.elna', 'w') do |current_stage|
+    skip = false
 
-    File.readlines('boot/stage13.elna').each do |line|
-      if !previous_line.nil? && previous_line.start_with?('begin') && line.strip.start_with?('return')
-      else
-        current_stage << previous_line unless previous_line.nil?
+    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
+        current_stage << line
       end
-      previous_line = line
     end
-    current_stage << previous_line
   end
 end