Allow #f as a valid source location #99
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dyoo
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Mar 21, 2014
Allow #f as a valid source location
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The documentation for srclocs says that (or/c #f natural) are appropriate arguments. This commit adds a checker for that contract and changes the checkers on srcloc to use that instead.
http://docs.racket-lang.org/reference/exns.html#%28def._%28%28lib._racket%2Fprivate%2Fbase..rkt%29._srcloc%29%29
(Noticed because Pyret has a few "dummy" positions with #f locations, which threw a runtime error from Whalesong-compiled Pyret.)