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Handle infinity and NaN cases #70
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Looking into what others do, it seems the ECMAScript 5.1 specification explicitly specifies stringifying +/- Infinity and NaN as null.
http://www.ecma-international.org/ecma-262/5.1/#sec-15.12.3 Of course, 'the String null' is pleasantly ambiguous. In Chrome I see it's actually doing:
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Hi @EricMCornelius, thanks for the note. I'll check it tonight. All the best, Niels |
- If an overflow occurs during parsing a number from a JSON text, an exception (std::out_of_range for the moment, to be replaced by a user-defined exception #244) is thrown so that the overflow is detected early and roundtripping is guaranteed. - NaN and INF floating-point values can be stored in a JSON value and are not replaced by null. That is, the basic_json class behaves like double in this regard (no exception occurs). However, NaN and INF are serialized to “null”. - Adjusted test cases appropriately.
This issue is fixed with 8feaf8d as follows:
Waiting for Travis to complete. Then this issue can be closed and the different semantics can be described in the wiki. |
http://en.cppreference.com/w/cpp/io/c/fprintf
snprintf will format infinity and nan doubles as Inf/Infinity or nan/nan(char_sequence) respectively. This can break the validity of a json.dump() document:
json/src/json.hpp
Line 2279 in 1580eee
You can check for infinity/nan w/ std::isinfinite/std::isnan - not sure what you'd like to actually do in those scenarios (some specific/configurable string representation?)
http://en.cppreference.com/w/cpp/numeric/math/isfinite
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