; EBNF Syntax for FORMOSA (fScript) 1.0
; (c) 1999-2001 J. W. Dietrich, University of Munich, Germany

script = block.

block = {"global" ident {"," ident}} {"on" ident "(" expression ")" block "end"
[ident]} statement.

statement = ["set" ident "to" expression | ident | "display dialog" expression
| "beep" [expression] | "if" condition "then" statement ["else" statement] "end
if" | statement].

condition = expression ("=" | "<>" | "<" | "<=" | ">" | ">=") expression.

expression = string | (["+" | "-"] term {("+" | "-") term}).

term = factor {("**" | "*" | "/") factor}.

factor = ident | number | "(" expression ")" | "sqr" factor | "sqrt" factor |
"sin" factor | "cos" factor | "exp" factor | "ln" factor | "arctan" factor.

ident = letter {letter | digit}.

number = digit {digit} ["." digit {digit}] ["e" ["+" | "-"] digit {digit}].

string = """ {character} """.

character = letter | digit.