doc-src/Tutorial/Misc/Last.thy

added inform_file_processed, inform_file_retracted;
proper outer syntax setup;
more robust theory loader actions;

Last = List +
consts last :: 'a list => 'a
recdef last "measure (%xs. length xs)"
    "last [x]      = x"
    "last (x#y#zs) = last (y#zs)"
end