common-lisp ANSI Common Lisp, the language standard and its documentation EBNF syntax declarations in documentation
Example
The ANSI CL standard uses an extended EBNF syntax notation. The documentation duplicated on Stackoverflow should use the same syntax notation to reduce confusion.
Example:
specialized-lambda-list::=
({var | (var parameter-specializer-name)}*
[&optional {var | (var [initform [supplied-p-parameter] ])}*]
[&rest var]
[&key{var | ({var | (keywordvar)} [initform [supplied-p-parameter] ])}*
[&allow-other-keys] ]
[&aux {var | (var [initform] )}*] )
Notation:
[foo]-> zero or onefoo{foo}*-> zero or morefoofoo | bar->fooorbar
