C / C++ / MFC

{// global matching code block

                    text = " START MATCH NAME AND ADDRESS CODE BLOCK ";
                    textEditPtr_DEBUG->append(text);

#ifdef TASK
              DELETED 
#endif

                    QString word;
                    QStringList words;
                    QString pattern = "Devices:\n\thci1\t00:50:B6:80:4D:5D\n\thci0\t00:15:83:15:A2:CB\n";
                    //QRegularExpression re("(\\w+)");
                    //QRegularExpression re("([0-F]{2}[:-]){5})");
                    //QRegularExpression re("([0-F]{2}[:])"); // match xx:
                    //QRegularExpression re("(([0-F]{2}[:]){5}[0-F]{2})"); // TOK match full BOTH addressxx:
                    // QRegularExpression re("((hci[0-9])(([0-F]{2}[:]){5}[0-F]{2}))"); NO GO 
                    //QRegularExpression re("(hci[0-9])"); TOK
                    QRegularExpression re("(([0-F]{2}[:]){5}[0-F]{2})");
                    QRegularExpressionMatchIterator i = re.globalMatch(pattern);
               
                    text = " HAS MATCH MULTI";
                    qDebug()<< text;

                    textEditPtr_DEBUG->append(text);
#ifdef BYPASS no go
                    foreach(auto item,i)
                    {
                    text = " TEST foreach ";
                    text += item;
                    qDebug()<< text;

                    textEditPtr_DEBUG->append(text);
                    }

#endif
                    while (i.hasNext()) {
                    QRegularExpressionMatch match = i.next();
                    word = match.captured(1);
                    words << word;
                    qDebug()<< word;

                    text =  " Full match name and address...  ";
                    text += word;
                    qDebug()<< text;

                    textEditPtr_DEBUG->append(text);
                    //}
                    }
#ifdef BYPASS
                    else
                    {
                    text = " NO MATCH  MULTI";
                    }
#endif
                    qDebug()<< text;

                    text = " END MATCH ADDRESS CODE BLOCK ";
                    textEditPtr_DEBUG->append(text);

                }

Salvatore Terress wrote:

Here in my text to find matches of ALL "hci" in it:

"Devices:\n\thci1\t00:50:B6:80:4D:5D\n\thci0\t00:15:83:15:A2:CB\n"

hci 00:50:B6:80:4D:5D
hci 00:15:83:15:A2:CB

(hci\w+([a-fA-F0-9][a-fA-F0-9]:)+[a-fA-F0-9][a-fA-F0-9])

Salvatore Terress wrote:

If I opt to use QRegularExpressionMatchIterator i = re.globalMatch(pattern);

Salvatore Terress wrote:

There should be at lest three "code groups " delimited by "(,,,code group... )"

((?:abc|def)xyz)

Salvatore Terress wrote:

the analysis of "xx:"

void EditInt(int& IntRef)
{
   IntRef=7;
}

int AnInt=6;
EditInt(AnInt);

Greg Utas wrote:

That's passing as a pointer, not as a reference.

void function(type& arg)
{
   if(&arg == nullptr)
      throw std::invalid_argument("function received null argument");
}

type* nasty = nullptr;
function(*nasty);

struct MyStruct
{
  MyStruct () {memset (this, 0, sizeof(MyStruct));} //always initialize your stuff.
    int a;
    int b;
    const char* text;
    short c;
};

Maximilien wrote:

It seems weird that the compiler accept to not fully initialize the struct.
They (old retired programmers) seem to expect the values to be zero-initialized.

Quote:

All members that are not initialized explicitly are empty-initialized.

Maximilien wrote:

I'm looking at old code.

Maximilien wrote:

seem to expect the values to be zero-initialized.

struct S {
  int i;
  double d;
  char str[10];
};

struct S s { .d = 123.4; }; 

[k5054@localhost]$ cat example.cpp 
#include <iostream>

struct S
{
    int i;
    float f;
    double d;
};

int main()
{
    S  s{0};

    std::cout << s.f << '\n';
}
[k5054@localhost]$ g++ example.cpp
[k5054@localhost]$ g++ example.cpp -Wall
[k5054@localhost]$ g++ example.cpp -Wextra
example.cpp: In function ‘int main()’:
example.cpp:12:11: warning: missing initializer for member ‘S::f’ [-Wmissing-field-initializers]
   12 |     S  s{0};
      |           ^
example.cpp:12:11: warning: missing initializer for member ‘S::d’ [-Wmissing-field-initializers]
[k5054@localhost]$