How do I use QRegExp to split an expression

**lni** · 12th January 2016, 09:01

Hi,

I need to split string such as "Stage1 <= 4.4e-05 || Stage == 1.2 && Comp >= 1.4e+03 || A+e-C > D" to get all variables in the expression.

In the example string, the result should be "Stage1", "4.4e-05", "Stage", "1.2", "Comp", "1.4e+03", "A", "e", "C", "D"

I am using QRegExp rx( "[+\\-*/(),<>&=| ]" ) to split it.

However, it also split "4.4e-05" and "1.4e+03". How can I write the QRegExp to split it without breaking scientific notation.

Thanks!

Here is sample code

Qt Code:

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#include <QStringList>
#include <QRegExp>
#include <QDebug>
 
int main()
{
  QString str( "Stage1 <= 4.4e-05 || Stage == 1.2 && Comp >= 1.4e+03 || A+e-C > D" );
  qDebug() << "str =" << str;
 
  QRegExp rx( "[+\\-*/(),<>&=| ]" );
  QStringList strList = str.split( rx, QString::SkipEmptyParts );
 
  qDebug() << "strList =" << strList;
}

#include <QStringList>
#include <QRegExp>
#include <QDebug>

int main()
{
  QString str( "Stage1 <= 4.4e-05 || Stage == 1.2 && Comp >= 1.4e+03 || A+e-C > D" );
  qDebug() << "str =" << str;

  QRegExp rx( "[+\\-*/(),<>&=| ]" );
  QStringList strList = str.split( rx, QString::SkipEmptyParts );

  qDebug() << "strList =" << strList;
}

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