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15 lines
373 B
Racket
15 lines
373 B
Racket
#lang brag
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b-program : b-line*
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b-line : @b-line-number [b-statement] (/":" [b-statement])*
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b-line-number : LINE-NUMBER
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@b-statement : b-rem
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| b-print
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| b-goto
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| b-end
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b-rem : REM
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b-print : /"print" (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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b-end : /"end" |