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13 lines
400 B
Racket
13 lines
400 B
Racket
8 years ago
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#lang brag
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b-program : [b-line] (/NEWLINE [b-line])*
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b-line : b-line-number [b-statement] (/":" [b-statement])*
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@b-line-number : INTEGER
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@b-statement : b-rem | b-end | b-print | b-goto
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b-rem : REM
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b-end : /"end"
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b-print : /"print" [b-printable] (/";" [b-printable])*
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@b-printable : STRING | b-expr
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b-goto : /"goto" b-expr
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b-expr : b-sum
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b-sum : b-number (/"+" b-number)*
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@b-number : INTEGER | DECIMAL
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