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  1. Qt
  2. QTBUG-33913

QJsonValue toDouble() conversion causes loss of data

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Details

    • Bug
    • Resolution: Invalid
    • Not Evaluated
    • None
    • 5.1.0
    • Core: Other
    • None
    • windows-7

    Description

      QJsonObject obj;
      obj.insert("dbl",double(73183493944884961));

      double d = obj.value("dbl").toDouble();
      qulonglong ul = d;
      qulonglong ul2 = 73183493944884961;

      qDebug () << ul << ul2;
      //output : 73183493944884960 73183493944884961

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-31926 Number precision in QJsonDocument.toJson() is still not enough for double

          • P3: Somewhat important - Should be fixed, but doesn't affect the release in any way.
          • Closed
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              thiago Thiago Macieira
              ashish.soni ashish soni
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              Dates

                Created:
                Updated:
                Resolved:

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