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-rw-r--r--tool/ruby_vm/models/c_expr.rb41
1 files changed, 41 insertions, 0 deletions
diff --git a/tool/ruby_vm/models/c_expr.rb b/tool/ruby_vm/models/c_expr.rb
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+++ b/tool/ruby_vm/models/c_expr.rb
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+#! /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 '../helpers/c_escape.rb'
+
+class RubyVM::CExpr
+ include RubyVM::CEscape
+
+ attr_reader :__FILE__, :__LINE__, :expr
+
+ def initialize location:, expr:
+ @__FILE__ = location[0]
+ @__LINE__ = location[1]
+ @expr = expr
+ end
+
+ # blank, in sense of C program.
+ RE = %r'\A{\g<s>*}\z|\A(?<s>\s|/[*][^*]*[*]+([^*/][^*]*[*]+)*/)*\z'
+ if RUBY_VERSION > '2.4' then
+ def blank?
+ RE.match? @expr
+ end
+ else
+ def blank?
+ RE =~ @expr
+ end
+ end
+
+ def inspect
+ sprintf "#<%s:%d %s>", @__FILE__, @__LINE__, @expr
+ end
+end