Lisp-like token type.
Parse the contents of file into lazy range over top-level expressions (SExpr).
Parse from input into lazy range over top-level expressions (SExpr).
Lisp-like S-expression.
Lisp-like token.
https://www.csee.umbc.edu/csee/research/kif/
https://en.wikipedia.org/wiki/Knowledge_Interchange_Format
http://sigmakee.cvs.sourceforge.net/viewvc/sigmakee/sigma/suo-kif.pdf
http://forum.dlang.org/post/prsxfcmkngfwomygmthi@forum.dlang.org
TODO: Break out lexer and parser parts to to nxt.lexing and nxt.parsing
TODO: Try infinite loops with break or goto instead of for loops.
TODO: Should we add LispFile.bySExpr to allow use of offsetTo inside LispFileParser lfp; foreach (lfp.bySExpr) now that copy-ctor is disabled for LispParser?
Lexer and parser of Lisp-like languages, including SUO-KIF and Emacs-Lisp.