Crash when parsing huge exponents

[nst]

json-swift does crash while parsing file i_number_huge_exp.json with fatal error: Double value cannot be converted to Int because the result would be greater than Int.max

[owensd]

I haven't taken a look at any of the i_* files. But good catch. I also need to do more validation with your transform set.

[nst]

The result of parsing the i_* files is... undefined, but the lib should return an error instead of crashing.

FYI here is the result of the whole JSONTestSuite for json-swift.

[owensd]

Oh definitely, it shouldn't crash.