1 files changed, 44 insertions, 0 deletions
diff --git a/tool/ruby_vm/models/attribute.rb b/tool/ruby_vm/models/attribute.rb
new file mode 100644
index 0000000000..0b6d6e09b2
--- /dev/null
+++ b/tool/ruby_vm/models/attribute.rb
@@ -0,0 +1,44 @@
+#! /your/favourite/path/to/ruby
+# -*- mode: ruby; coding: utf-8; indent-tabs-mode: nil; ruby-indent-level: 2 -*-
+# -*- frozen_string_literal: true; -*-
+# -*- warn_indent: true; -*-
+#
+# Copyright (c) 2017 Urabe, Shyouhei.  All rights reserved.
+#
+# This file is  a part of the programming language  Ruby.  Permission is hereby
+# granted, to  either redistribute and/or  modify this file, provided  that the
+# conditions  mentioned in  the file  COPYING are  met.  Consult  the file  for
+# details.
+
+require_relative 'c_expr'
+
+class RubyVM::Attribute
+  include RubyVM::CEscape
+  attr_reader :insn, :key, :type, :expr
+
+  def initialize insn:, name:, type:, location:, expr:
+    @insn = insn
+    @key = name
+    @expr = RubyVM::CExpr.new location: location, expr: expr
+    @type = type
+  end
+
+  def name
+    as_tr_cpp "attr #{@key} @ #{@insn.name}"
+  end
+
+  def pretty_name
+    "attr #{type} #{key} @ #{insn.pretty_name}"
+  end
+
+  def declaration
+    argv = @insn.opes.map {|o| o[:decl] }.join(', ')
+    sprintf '%s %s(%s)', @type, name, argv
+  end
+
+  def definition
+    argv = @insn.opes.map {|o| "MAYBE_UNUSED(#{o[:decl]})" }.join(",\n    ")
+    argv = "\n    #{argv}\n" if @insn.opes.size > 1
+    sprintf "%s\n%s(%s)", @type, name, argv
+  end
+end