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@@ -0,0 +1,75 @@
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+ PROGRAM ← STATEMENTS
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+ STATEMENTS ← ((COMMAND COMMENT? / COMMENT) EOX)+
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+ ~COMMENT ← ("#" / "comment" / "remark" / "rem") (!([\r\n]+).)*
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+ COMMAND ← WORD (ARGUMENTS)?
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+ EKEYWORD ← "calculate" / "calc" / "expression" / "expr"
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+ PKEYWORD ← "evaluate" / "eval" / "perform"
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+ XKEYWORD ← "do" / "end"
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+ BLOCK ← "do" EOX? STATEMENTS? "end" / "{" EOX? STATEMENTS? "}"
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+ PBLOCK ← PKEYWORD EOX? STATEMENTS? "end" / "[" EOX? STATEMENTS? "]"
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+
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+ ARGUMENTS ← (ARGSEP? (BLOCK / PBLOCK / ARGUMENT))*
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+ # ARGUMENTS ← PREPOSITION* ARTICLE* ARGUMENT ((ARGSEP? BLOCK) /
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+ # (ARGSEP? PBLOCK) / (ARGSEP? ARGUMENT))*
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+ ARGSEP ← ',' / ((PREPOSITION / ARTICLE)+)
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+ PREPOSITION ← < ( "else" / "otherwise" /
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+ "aboard" / "about" / "above" / "across" / "after" / "against" /
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+ "alongside"/ "along" / "amidst" / "amidst" / "among" / "around" /
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+ "as" / "at" / "atop" / "before" / "behind"/ "below" /
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+ "beneath" / "besides" / "beside" / "between" / "beyond"/ "but" /
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+ "by" / "circa" / "despite" / "down" / "during"/ "except" /
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+ "for" / "from" / "inside" / "into" / "in" / "less" /
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+ "like" / "near" / "nothwithstanding" / "off" / "onto" /
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+ "on" / "opposite" / "outside" / "out" / "over" / "since" /
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+ "than" / "through" / "thru" / "towards" / "throughout" / "to" /
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+ "underneath"/ "under" / "unlike" / "until" / "upon" / "upside" /
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+ "up" / "versus" / "via" / "within" / "without" / "with" ) > WHITESPACE
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+ ~ARTICLE ← <("a" / "an" / "the")> WHITESPACE
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+ ARGUMENT ← EXPR
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+ # / NUMBER
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+ EXPR ← BINEXPR / UNEXPR
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+ BINEXPR ← (ATOM (BINOP ATOM)*)
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+ UNEXPR ← (UNOP ATOM)
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+ ATOM ← STRING / NAME / NUMBER / '(' EXPR ')' / EKEYWORD EXPR "end"
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+ KWUNOP ← "not" / "negate"
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+ KWBINOP ← "plus" / "minus" / "times" / "divide" / "of" / "'s" / "'" / "and" / "or" / "equals" / "equal" / "is"
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+ BINOP ← < [-+/*] / "<-" / "->" "&&"/ "||" / "==" / KWBINOP >
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+ UNOP ← < [-!] / KWUNOP >
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+ # / "of" / "'s"
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+ STRING ← ESCSTR / RAWSTR
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+ # Raw string macro
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+ RAWSM(O,C) ← O < (!(C).)* > C
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+ NAME ← ARTICLE? WORD+
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+ # Escaped string macro.
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+ ESCSM(O,C) ← O < (!(C)STRCHAR)* > C
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+ ESCSTR ← ESCSM("`", "`") / ESCSM('"', '"')
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+ RAWSTR ← RAWSM('<<', '>>') / RAWSM('«', '»') / RAWSM('‹', '›') / RAWSM('“', '”')
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+ STRESC1 ← "\\" [nrtfv\'\\"\[\]\\]
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+ STRESC2 ← "\\" [0-3] [0-7] [0-7]
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+ STRESC3 ← "\\" [0-7] [0-7]*
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+ STRESC4 ← "\\x" [0-9a-fA-F] [0-9a-fA-F]?
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+ STRESC5 ← "\\u" [0-9a-fA-F]+
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+ STRNOESC ← (!('\\\\').)
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+ STRCHAR ← STRESC1 / STRESC2 / STRESC3 / STRESC4 / STRESC5 / STRNOESC
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+ NUMBER ← DECIMAL / INTEGER
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+ DECIMAL ← < [-]?[0-9]+[.][0-9]+ >
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+ INTEGER ← < [-]?[0-9]+ >
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+ ~EOX ← ([ \t]*[\r\n.]+[ \t]*)+
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+ KEYWORD ← PREPOSITION / ARTICLE / XKEYWORD / EKEYWORD / KWBINOP / KWUNOP
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+ WORD ← !KEYWORD ANYWORD
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+ ANYWORD ← < [a-zA-Z][a-zA-Z0-9]* >
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+ WHITESPACE ← < [ \t]* >
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+ %whitespace ← [ \t]*
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+ %word ← [a-zA-Z][-+/*a-zA-Z0-9]*
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+ ---
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+ # Expression parsing option
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+ %expr = BINEXPR # Rule to apply 'precedence climbing method' to
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+ %binop = L && || and or
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+ %binop = L == equals equal is
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+ %binop = L + - plus minus
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+ %binop = L * / times divide
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+ %binop = L of 's <- -> '
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+
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+
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+ # foo bar baz quux
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+
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Beoran