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SHORTCODE.Position
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text.Position
Position 方法对于错误报告非常有用。例如，如果你的短代码需要一个“greeting”参数
layouts/shortcodes/myshortcode.html
{{ $greeting := "" }}
{{ with .Get "greeting" }}
{{ $greeting = . }}
{{ else }}
{{ errorf "The %q shortcode requires a 'greeting' argument. See %s" .Name .Position }}
{{ end }}在缺少“greeting”参数的情况下，Hugo 将抛出错误消息并导致构建失败
ERROR The "myshortcode" shortcode requires a 'greeting' argument. See "/home/user/project/content/about.md:11:1"