module php/pp/common/literals/heredocLiterals

rules
// For now very straightforward.
  php-to-box :
    HereDoc(open,parts,s)  -> H([SOpt(HS(), "0")], [ open | [ str | [ S(s) ] ] ])
H hs=0 [ ~open ~str s ]
       where <lit-of-esc-to-string> parts => str

  php-to-box :
    HereDocStart(s) -> H([SOpt(HS(), "0")], [ S("<<<") | [ S(s) ] ])
H hs=0 ["<<<" s]