(C++) BoostRegexExample1

Boost.Regex example 1 is an example how to use the Boost.Regex library.

The example below shows how to define a regular expression for a Dutch zip code, how to check for it and how to search for it.

• Download the Qt Creator project 'CppBoostRegexExample1' (zip)
• Download the 'CppBoostRegexExample1' Windows executable (zip)

Technical facts

Operating system(s) or programming environment(s)

• Lubuntu 15.04 (vivid)

IDE(s):

• Qt Creator 3.1.1

Project type:

• Console application

C++ standard:

• C++98

Compiler(s):

• G++ 4.9.2

Libraries used:

• STL: GNU ISO C++ Library, version 4.9.2

 

 

 

 

 

Qt project file: ./CppBoostRegexExample1/CppBoostRegexExample1.pro

 

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include(../../ConsoleApplication.pri) #Or use the code below # QT += core # QT += gui # greaterThan(QT_MAJOR_VERSION, 4): QT += widgets # CONFIG   += console # CONFIG   -= app_bundle # TEMPLATE = app # CONFIG(release, debug|release) { #   DEFINES += NDEBUG NTRACE_BILDERBIKKEL # } # QMAKE_CXXFLAGS += -std=c++11 -Wall -Wextra -Weffc++ # unix { #   QMAKE_CXXFLAGS += -Werror # } include(../../Libraries/BoostAll.pri) SOURCES += main.cpp

 

 

 

 

 

./CppBoostRegexExample1/main.cpp

 

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#include <cassert> #include <string> #pragma GCC diagnostic push #pragma GCC diagnostic ignored "-Weffc++" #include <boost/regex.hpp> #pragma GCC diagnostic pop int main() {   //Define how a dutch zip code is formatted   const boost::regex dutch_zip_code("\\d{4}\\s[A-Z]{2}");   //Check if the regex works properly   assert(boost::regex_match("1234 AB",dutch_zip_code)==true);   assert(boost::regex_match("1234 ab",dutch_zip_code)==false);   assert(boost::regex_match("1234ab",dutch_zip_code)==false);   //Define a sentence with a Dutch zip code in it   const std::string s = "My Dutch zip code is 1234 AB.";   //Show how boost::regex_match and boost::regex_search work   assert(boost::regex_match(s,dutch_zip_code)==false     && "the std::string does not match a dutch zip code");   assert(boost::regex_search(s,dutch_zip_code)==true     && "but the std::string does contain a dutch zip code");   //Show how to obtain a Dutch zip code from a std::string   const boost::sregex_iterator i(s.begin(),s.end(),dutch_zip_code);   const std::string t = i->str();   assert(t=="1234 AB"); }

 

 

 

 

 

./CppBoostRegexExample1/CppBoostRegexExample1.sh

 

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#!/bin/bash #Script to check the status of compiles #Copies executables (both Linux and Win32) executables to ~/bin (overwrites older) #set -x verbose #echo on mytempfile="tmp.txt" if [ -e $mytempfile ] then   rm $mytempfile fi rm *.pro.user for myprofile in `ls | egrep ".pro\>"` do   echo $myprofile   mybasename=`echo $myprofile | sed "s/\.pro//"`   #For every .pro file,   # 0: compile   # 1: crosscompile using Qt5   for type in 0 1   do     myqmake=""     mytypestr=""     #Cleaning up     rm Makefile     rm Makefile.*     rm -r release     rm -r debug     rm ui_*.h     rm qrc_*.cpp     rm moc_*.cpp     rm object_script*.*     rm *.o     rm *_plugin_import.cpp     case $type in     0) myqmake="qmake" mytypestr="Lubuntu" ;;     1) myqmake="../../Libraries/mxe/usr/i686-pc-mingw32/qt5/bin/qmake" mytypestr="Qt5LubuntuToWindows" ;;     esac     $myqmake $myprofile     if [ ! -e Makefile ]     then       echo $myprofile", "$mytypestr": FAIL (Makefile not found)" >> ../$mytempfile       continue     fi     make     if [ -e $mybasename ] || [ -e ./release/$mybasename".exe" ]     then       echo $myprofile", "$mytypestr": SUCCESS" >> ../$mytempfile       #echo "SUCCESS for mybasename: "$mybasename       if [ -e $mybasename ]       then         #echo "(1) cp "$mybasename" ~/bin/"         cp $mybasename ~/bin/         rm $mybasename       fi       if [ -e ./release/$mybasename".exe" ]       then         #echo "(2) cp ./release/"$mybasename".exe ~/bin/"         cp ./release/$mybasename".exe" ~/bin/       fi     else       echo $myprofile", "$mytypestr": FAIL (executable not found)" >> ../$mytempfile       #echo "FAIL for mybasename: "$mybasename     fi     #Cleaning up     rm Makefile     rm Makefile.*     rm -r release     rm -r debug     rm ui_*.h     rm qrc_*.cpp     rm moc_*.cpp     rm object_script*.*     rm *.o     rm *_plugin_import.cpp   done #next type done #next profile cat $mytempfile rm $mytempfile