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  1. Qt
  2. QTBUG-66466

QString::toDouble() doesn't parse -/+Infinity

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Details

    • Bug
    • Resolution: Invalid
    • Not Evaluated
    • None
    • 5.10.0, 5.9.4
    • Core: QString and Unicode
    • None
    • Windows 10 x64, MSVC2015 x32

    Description

      The standard C++11 function std::stod and atof() can parse -/+Infinity constant,
      but QString::toDouble() not:

      bool ok;
double v1 = QString("Infinity").toDouble(&ok);   // v1=0, ok=false
double v2 = QString("+Infinity").toDouble(&ok);  // v2=0, ok=false
double v3 = QString("-Infinity").toDouble(&ok);  // v3=0, ok=false

double v4 = atof("Infinity");   // v4=inf
double v5 = atof("+Infinity");  // v5=inf
double v6 = atof("-Infinity");  // v6=-inf

      http://en.cppreference.com/w/cpp/string/basic_string/stof
      http://www.cplusplus.com/reference/cstdlib/atof/?kw=atof

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-74325 QByteArray::toDouble() and qstrtod() function does not correctly parse the uppercase NaN

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
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              thiago Thiago Macieira
              amiart Robert Szefner
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              Dates

                Created:
                Updated:
                Resolved:

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