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#lang racket/base
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(require "syntax-flatten.rkt")
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(provide generate-literals)
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(define (literal-identifier? pat-datum)
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(and (symbol? pat-datum)
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(not (memq pat-datum '(... _))) ; isn't a reserved identifier
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(let ([pat-str (symbol->string pat-datum)])
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(or (not (regexp-match #rx"[A-Z]" pat-str)) ; either doesn't contain at least one uppercase letter ...
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(not (equal? (string-upcase pat-str) pat-str)))))) ;... or doesn't contain all uppercase letters
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;; generate literals for any symbols that are not ... or _ and not IN_CAPS
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(define (generate-literals pats)
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(for*/list ([pat-arg (in-list (syntax-flatten pats))]
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[pat-datum (in-value (syntax->datum pat-arg))]
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#:when (literal-identifier? pat-datum))
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pat-arg))
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(module+ test
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(require rackunit)
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(check-equal? (map syntax->datum (generate-literals #'(foo 42 BAR _ (... ...) bar <=> 3Bar 3bar))) '(foo bar <=> 3Bar 3bar)))
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