Description

check the environment for a property, usually a condition like questioning the existance of specified wordset, but it can also return some implementation properties like "WORDLISTS" (the length of the search-order) or "#LOCALS" (the maximum number of locals)

Here it implements the environment queries as a SEARCH-WORDLIST in a user-visible vocabulary called ENVIRONMENT

 : ENVIRONMENT?
   ['] ENVIRONMENT >WORDLIST SEARCH-WORDLIST
   IF  EXECUTE TRUE ELSE  FALSE THEN ;
 

dpANS .6.1.1345 - standard forth word