EXPR =
'' [ DEFUN | DEFVAR | TERM ] * ''
TERM = [ INT | STRING | SYMBOL | LIST | VAR | FUNCALL ]
DEFUN =
''
ARGS ?
TERM *
''
ARGS =
'' FIXED ? OPTIONAL ? REST ? ''
| '' FIXED ? OPTIONAL ? REST ? ''
FIXED =
' VAR + ''
OPTIONAL =
'' VAR + ''
REST =
'' VAR ''
DEFVAR = DEFVAR-INT DEFVAR-STR DEFVAR-SYM
DEFVAR-INT =
''
DESCRIPTION ?
[ INT POSSIBLE-INT-VALUE ? ] ?
''
POSSIBLE-INT-VALUE =
[ INT | '' INT INT '' ] +
DEFVAR-STR =
''
DESCRIPTION ?
[ STR DEFVAR-STR_VALUE ? ] ?
''
DEFVAR-STR_VALUE =
STR +
DEFVAR-SYM =
''
DESCRIPTION ?
[ SYMBOL POSSIBLE-SYM-VALUE ? ] ?
''
POSSIBLE-SYM-VALUE =
SYMBOL +
DESCRIPTION =
'' [ TEXT | GETTEXT ] ''
GETTEXT =
'' TEXT ''
INT =
'' INTEGER ''
STR =
'' STRING ''
SYMBOL =
'' NAME ''
LIST =
'' TERM * '
' |
VAR =
''
FUNCALL =
'' TERM * ''
| PREDEFINED
PREDEFINED =
SET
| AND | OR | NOT
| LT | LE | EQ | GE | GT | NOTEQ
| ADD | SUB | MUL | DIV | MOD
| LOGAND | LOGIOR | LOGXOR | LSH
| APPEND | CONCAT | LENGTH | NTH | COPY | INS | DEL
| PROGN | IF | WHEN | COND
| LOOP | WHILE | FOREACH | BREAK | RETURN
| QUOTE | EVAL | TYPE
;; TERM has a value, and is evaluated to a TERM as below.
;; INT has an integer value, and is evaluated to itself .
;; STRING has a string value, and is evaluated to itself.
;; SYMBOL has a symbol value, and is evaluated to itself.
;; LIST has a list value and, is evaluated to itself.
;; VAR has a value of TERM that is assigned to the variable,
;; and is evalued to that TERM.
;; FUNCALL has a value of TERM that is returned by that function,
;; and is evalued to that TERM.
INTTERM = INT | VAR (value is INT) | FUNCALL (return INT)
STRTERM = STR | VAR (value is STR) | FUNCALL (return STR)
SYMTERM = SYMBOL | VAR (value is SYMBOL) | FUNCALL (return SYMBOL)
LISTTERM = LIST | VAR (value is LIST) | FUNCALL (return LIST)
;; Here after, when an argument is TERM, it is given to a function
;; without being evaluted. Otherwise, an evaluated term is given.
SET = '' TERM ''
ADD = '' INTTERM + ''
| '' INTTERM + ''
SUB = '' INTTERM + ''
| '' INTTERM + ''
MUL = '' INTTERM + ''
| '' INTTERM + ''
DIB = '' INTTERM + '
'
| '' INTTERM + '
'
MOD = '' INTTERM INTTERM ''
| '' INTTERM ''
LOGAND = ' INTTERM + ''
| '' INTTERM + ''
LOGIOR = ' INTTERM + ''
| '' INTTERM + ''
LOGXOR = ' INTTERM + ''
| '' INTTERM + ''
LSH = '' INTTERM INTTERM ''
| '' INTTERM ''
LT = '' INTTERM INTTERM ''
LE = '' INTTERM INTTERM ''
EQ = '' INTTERM INTTERM ''
NOTEQ = '' INTTERM INTTERM ''
GE = '' INTTERM INTTERM ''
GT ='' INTTERM INTTERM ''
APPEND = '' TERM + ''
| '' TERM + ''
CONCAT = '' [ INTTERM | STRTERM | LISTTERM ] + ''
| '' [ INTTERM | STRTERM | LISTTERM ] + ''
LENGTH = '' [ STRTERM | LISTTERM ] ''
NTH = '' INTTERM [ STRTERM | LISTTERM ] ''
COPY = '' LISTTERM ''
INS = '' INTTERM [ STRTERM | LISTTERM ] ''
DEL = '' INTTERM INTTERM ''
AND = '' TERM + ''
OR = '' TERM + ''
NOT = '' TERM ''
PROGN = '' TERM * ''
IF = '' TERM TERM TERM ? ''
WHEN = '' TERM TERM * ''
COND = '' LIST + ''
LOOP = '' TERM + ''
WHILE = '' TERM + ''
FOREACH = '' TERM + ''
BREAK = '' TERM ? ''
RETURN = '' TERM ? ''
QUOTE = '' TERM '
'
EVAL = '' TERM ''
TYPE = '' TERM ''