Ideas for status-rendering in the Neos-core as discussed by @grebaldi und @mficzel

Example.fusion

#
# The rendering is implemented as special renderer for the error messages with a specific status code
# 
# The fusion `error` path is rendered with only `site` and the `error` in the fusion context
#
error = Neos.Fusion:Case {
  @context.notFoundNode = ${q(site).children('[uriPathSegment == 404]').get(0)}
  
  404 {
    condition = ${error.status == 404 && notFoundNode}
    type = ${q(notFoundNode).property('_nodeType.name')}
  }

  default {
    condition = true
    renderer = Neos.Fusion:ErrorMessage {
      title = ${error.message}
    }
  }
}