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21 lines
788 B
Racket
21 lines
788 B
Racket
8 years ago
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#lang racket/base
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(require (for-syntax racket/base br/syntax) br/define racket/match)
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(provide (all-defined-out))
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(define-macro (define-exn EXN-ID BASE-EXN)
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(with-pattern ([RAISE-EXN-ID (prefix-id "raise-" #'EXN-ID)])
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#'(begin
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(define-struct (EXN-ID BASE-EXN)
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(a-srcloc) #:transparent
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#:property prop:exn:srclocs
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(lambda (a-struct)
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(match a-struct
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[(struct EXN-ID
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(msg marks a-srcloc))
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(list a-srcloc)])))
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(define RAISE-EXN-ID
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(case-lambda
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[(srcloc)
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(raise (EXN-ID (format "error: ~a" 'EXN-ID) (current-continuation-marks) srcloc))]
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[()
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(raise (EXN-ID (format "error: ~a" 'EXN-ID) (current-continuation-marks)))])))))
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