Issue #7491 has been updated by mrkn (Kenta Murata). Status changed from Open to Assigned Assignee set to mrkn (Kenta Murata) ---------------------------------------- Bug #7491: BigMath.#exp ??? Float???Rational ??????å®???§ã????ªã?? https://bugs.ruby-lang.org/issues/7491#change-34324 Author: sho-h (Sho Hashimoto) Status: Assigned Priority: Low Assignee: mrkn (Kenta Murata) Category: lib Target version: 2.0.0 ruby -v: ruby 2.0.0dev (2012-12-02 trunk 38135) [x86_64-linux] 1.9.3 ?????? BigMath.#exp ??§ã?? Fixnum???Float???Rational ??ªã????¸ã?§ã?¯ã????????å®???§ã???????®ã?§ã?¯ã?ªã???????¨æ???????®ã?§ã????????Float???Rational ??«ã?¤ã????¦ã?¯ç?¨ã?? ArgumentError ??? TypeError ??«ã?ªã?£ã?¦ã????¾ã??????????§ã????? puts BigMath.exp(BigDecimal("1.0"), 10) # => 0.2718281828E1 puts BigMath.exp(1, 10) # => 0.2718281828E1 puts BigMath.exp(1.0, 10) # => ArgumentError puts BigMath.exp(Rational(1, 1), 10) # => TypeError -- http://bugs.ruby-lang.org/