Regular Expressions

ODБOï

I am having hard time with Regular Expressions, please help me to write one.
I have a text file that looks like this

...
N10 (T2 TYPE=BOULE DIAM=12.1 LT=111 LU=80) // capture
N11 (T3 TYPE=CYL DIAM=10.10 LT=120 LU=88)  // capture
N12 X5 Y10  Z1 // ignore
...
...

for every line starting with T<number> i want to construct a Tool object with arguments TYPE, DIAM, LT, LU

so my Tool object ctor is

Tool(QString type, double diam, double lt, double lu)

now i need to write the Regular Expression.

QList<Tool*> tools; // i will put the Tools i create here

  const QRegularExpression regx("[T]\d"); // <

QString  currentType;
double currentDiam;
double currentLt;
double currentLu;
  

    QTextStream in(&file);
    while(!in.atEnd()) {
        QString line = in.readLine();
        QRegularExpressionMatchIterator iter = regx.globalMatch(line);
        while (iter.hasNext()){
            const QRegularExpressionMatch reMatch = iter.next();

   //          if line contains T<number>
   //         currentType = 
   //         currentDiam = 
   //         currentLt = 
   //         currentLu = 
    //   Tool* tool = new Tool(currentLt,currentDiam,currentLt,currentLu  )
   //     tools.append(tool)

thank you

JonB

@LeLev said in Regular Expressions:

While you wait for someone better/with more time, it's just something like:

TYPE=(.*) DIAM=(.*) LT=(.*) LU=(.*)

It's the (...) that makes a capture group, which you can reference to pick out what was there.

I find it useful to play with these at, say, https://regex101.com/, have you tried that?

ODБOï

@JonB said in Regular Expressions:

have you tried that?

yes i was try/fail/retry -ing for 2 houres...

thank you very much for the quick answer.

const QRegularExpression regx("(T[0-9][0-9]*) TYPE=(.*) DIAM=([-.0-9]+) LT=([-.0-9]+) LU=([-.0-9]+)");