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#lang br/quicklang
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(require "struct.rkt" "run.rkt" "elements.rkt")
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(provide (rename-out [b-module-begin #%module-begin])
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(all-from-out "elements.rkt"))
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(define-macro (b-module-begin (b-program LINE ...))
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(with-pattern
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([((b-line NUM STMT ...) ...) #'(LINE ...)]
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[(LINE-FUNC ...) (prefix-id "line-" #'(NUM ...))]
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[(VAR-ID ...) (find-unique-var-ids #'(LINE ...))])
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#'(#%module-begin
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(define VAR-ID 0) ...
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LINE ...
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(define line-table
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(apply hasheqv (append (list NUM LINE-FUNC) ...)))
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(void (run line-table)))))
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(begin-for-syntax
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(require racket/list)
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(define (find-unique-var-ids line-stxs)
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(remove-duplicates
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(for/list ([stx (in-list (syntax-flatten line-stxs))]
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#:when (syntax-property stx 'b-id))
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stx)
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#:key syntax->datum)))
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