anchor.diff:  * *-o* -, *--output*=- :
     Write TOP to STDOUT
   
  -* *-f* _FILE_, *--foreach*=_FILE_ :
  -  Write TOP (obj./arr.) to FILE, one line/item
  +* *-O*, *--object* :
  +  Assert TOP to be an object
   
  -* *-f* -, *--foreach*=- :
  -  Write TOP (obj./arr.) to STDOUT, one line/item
  +* *-q* _STR_, *--quote*=_STR_ :
  +  Convert STR to a string, push onto TOP
   
  -* *-u* _FILE_, *--unquote*=_FILE_ :
  -  Write TOP (str.) to FILE without quotes
  +* *-Q*, *--query* :
  +  Query the stack by deep copying and pushing onto TOP
   
  -* *-u* -, *--unquote*=- :
  -  Write TOP (str.) to STDOUT without quotes
  -
  -* *-t* #, *--truncate*=# :
  -  Shrink TOP (arr.) to length #
  -
  -* *-t* -#, *--truncate*=-# :
  -  Discard last # items from TOP (arr.)
  -
  -* *-i* #, *--insert*=# :
  -  Insert TOP into PREV (arr.) at #
  -
  -* *-a*, *--append* :
  -  Append TOP to the end of PREV (arr.)
  -
  -* *-a*, *--append* :
  -  Set missing values from TOP (obj.) into PREV (obj.)
  -
  -* *-x*, *--extend* :
  -  Append items from TOP to the end of PREV (arr.)
  -
  -* *-x*, *--extend* :
  -  Set all values from TOP (obj.) into PREV (obj.)
  -
  -* *-d* _NAME_, *--delete*=_NAME_ :
  -  Delete NAME from TOP (obj.)
  -
  -* *-d* #, *--delete*=# :
  -  Delete # from TOP (arr.)
  -
  -* *-d* -#, *--delete*=-# :
  -  Delete # from the end of TOP (arr.)
  -
  -* *-l*, *--length* :
  -  Push length of TOP (arr./str./obj.) to TOP
  -
  -* *-e*, *--empty* :
  -  Erase all items from TOP (arr./obj.)
  -
  -* *-g* _NAME_, *--get*=_NAME_ :
  -  Get item with NAME from TOP (obj.), push to TOP
  -
  -* *-g* #, *--get*=# :
  -  Get # item from TOP (arr.), push to TOP
  -
  -* *-g* -#, *--get*=-# :
  -  Get # item from the end of TOP (arr.), push to TOP
  +* *-R*, *--real* :
  +  Assert TOP to be a real
   
   * *-s* _NAME_, *--set*=_NAME_ :
     Sets TOP into PREV (obj.) with NAME
  
positive.code: 
  == OPTIONS
  
  * *-X*, *--not* :
    Invert the following assertion
  
  * *-O*, *--object* :
    Assert TOP to be an object
  
  * *-A*, *--array* :
    Assert TOP to be an array
  
  * *-S*, *--string* :
    Assert TOP to be a string
  
  * *-I*, *--integer* :
    Assert TOP to be an integer
  
  * *-R*, *--real* :
    Assert TOP to be a real
  
  * *-N*, *--number* :
    Assert TOP to be a number
  
  * *-T*, *--true* :
    Assert TOP to be true
  
  * *-F*, *--false* :
    Assert TOP to be false
  
  * *-B*, *--boolean* :
    Assert TOP to be a boolean
  
  * *-0*, *--null* :
    Assert TOP to be null
  
  * *-E*, *--equal* :
    Assert TOP to be equal to PREV
  
  * *-Q*, *--query* :
    Query the stack by deep copying and pushing onto TOP
  
  * *-M* #, *--move*=# :
    Move TOP back # places on the stack
  
  * *-U*, *--unwind* :
    Discard TOP from the stack
  
  * *-j* _JSON_, *--json*=_JSON_ :
    Parse JSON constant, push onto TOP
  
negative.code: * *-j* -, *--json*=- :
    Read from STDIN, push onto TOP
  
  * *-l*, *--length* :
    Push length of TOP (arr./str./obj.) to TOP
  
  * *-M* #, *--move*=# :
    Move TOP back # places on the stack
  
  * *-N*, *--number* :
    Assert TOP to be a number
  
  * *-o* _FILE_, *--output*=_FILE_ :
    Write TOP to FILE
  