TYPO3 Core

Using a configuration like

page.10 = FLUIDTEMPLATE
page.10 {

  # select template based on backend layout
  templateName.stdWrap.cObject = CASE
  templateName.stdWrap.cObject {
    key.data = pagelayout

    default = TEXT
    default.value = Subpage

    1 = TEXT
    1.value = Index
  }
}

does not work, since the code only evaluates the templateName stdWrap if templateName is set to a value directly.