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31 lines
719 B
Racket
31 lines
719 B
Racket
#lang brag
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txtadv-program : verb-section everywhere-section things-section places-section start-section
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verb-section : <"===VERBS==="> verb-item+
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verb-item : verb-name+ s-exp
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verb-name : [<",">] ID ["_"]
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everywhere-section : <"===EVERYWHERE==="> id-desc+
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things-section : <"===THINGS==="> thing-item+
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thing-item : DASHED-NAME id-desc+
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places-section : <"===PLACES==="> place-item+
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place-item : DASHED-NAME place-descrip place-items id-desc+
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place-descrip : STRING ; `place-desc` is already used in expander
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place-items : <"["> place-name* <"]"> ; `place-things` is already used
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place-name : [<",">] ID
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start-section : <"===START==="> place-name
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id-desc : ID s-exp
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s-exp : ID | STRING | <"("> s-exp* <")"> |