17 lines
492 B
Racket
17 lines
492 B
Racket
#lang brag
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u-program: [/NEWLINE+] (u-expr [/NEWLINE+])*
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u-expr:
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u-series ; string series
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| u-atom
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| u-converting-num
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| u-sexp
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u-sexp:
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L_PAREN u-expr (SEPERATOR u-expr)* R_PAREN
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| L_PAREN u-expr (G_SEPERATOR [(/" "|/NEWLINE)+] u-expr [(/" "|/NEWLINE)+])* R_PAREN
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u-series: (u-atom | u-sexp)+
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u-converting-num: NUM_CONVERTER (u-id | u-number)
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u-atom: u-id | u-string | u-number | NEWLINE+
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u-number: INTEGER | DECIMAL
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u-id: ID
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u-string: u-char+
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u-char: CHAR
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