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kwatch/ex-heredoc2.rb

Created July 9, 2014 16:42
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ヒアドキュメントとBabyErubisの組み合わせ例。テンプレート内のエラーでも、正確なファイル名と行番号が表示されることに注目！
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ex-heredoc2.rb
# -*- coding: utf-8 -*-
require 'baby_erubis'
erb = BabyErubis::Html.new.from_str <<'END', __FILE__, __LINE__+1
<html>
<body>
<ul>
<% (1..3).each do %>
<li><%= x %></li>
<% end %>
</ul>
</body>
</html>
END
html = erb.render()
print "Content-Type: text/html;charset=utf-8\r\n"
print "\r\n"
print html
#### 実行結果：BabyErubisを使えば、eRubyテンプレート内のエラーであっても、
#### 正確なファイル名と行番号が表示される！(最初の「ex-heredoc2.rb:10」がそれ)
# ex-heredoc2.rb:10:in `block (2 levels) in empty_binding': undefined local variable or method `x' for #<BabyErubis::HtmlTemplateContext:0x000001010a48d8> (NameError)
# from ex-heredoc2.rb:9:in `each'
# from ex-heredoc2.rb:9:in `block in empty_binding'
# from /Users/kwatch/src/baby_erubis/lib/baby_erubis.rb:107:in `instance_eval'
# from /Users/kwatch/src/baby_erubis/lib/baby_erubis.rb:107:in `render'
# from ex-heredoc2.rb:16:in `<main>'
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