From f640dced8976048f997026927a45a9c06672d02b Mon Sep 17 00:00:00 2001
From: Dimitri van Heesch <doxygen@gmail.com>
Date: Sat, 13 Feb 2021 18:58:43 +0100
Subject: Refactoring: replace QRegExp by std::regex in docparser.cpp

---
 src/code.l         |  1 -
 src/commentcnv.l   |  1 -
 src/defargs.l      |  1 -
 src/docbookgen.cpp |  1 -
 src/docparser.cpp  | 24 +++++++++++++-----------
 5 files changed, 13 insertions(+), 15 deletions(-)

diff --git a/src/code.l b/src/code.l
index f7e1775..5481fdc 100644
--- a/src/code.l
+++ b/src/code.l
@@ -38,7 +38,6 @@
 #include <stdio.h>
 #include <assert.h>
 #include <ctype.h>
-#include <qregexp.h>
 #include <qdir.h>
 
 #include "code.h"
diff --git a/src/commentcnv.l b/src/commentcnv.l
index 817feb3..7a3cda5 100644
--- a/src/commentcnv.l
+++ b/src/commentcnv.l
@@ -29,7 +29,6 @@
 #include <stdlib.h>
 #include <stack>
 
-#include <qregexp.h>
 #include <qtextstream.h>
 #include <qglobal.h>
 
diff --git a/src/defargs.l b/src/defargs.l
index e25c1fe..6846544 100644
--- a/src/defargs.l
+++ b/src/defargs.l
@@ -56,7 +56,6 @@
 //#include <iostream.h>
 #include <assert.h>
 #include <ctype.h>
-#include <qregexp.h>
 #include <qcstringlist.h>
 
 #include "defargs.h"
diff --git a/src/docbookgen.cpp b/src/docbookgen.cpp
index 372a462..984d685 100644
--- a/src/docbookgen.cpp
+++ b/src/docbookgen.cpp
@@ -20,7 +20,6 @@
 #include <qdir.h>
 #include <qfile.h>
 #include <qtextstream.h>
-#include <qregexp.h>
 #include "docbookgen.h"
 #include "doxygen.h"
 #include "message.h"
diff --git a/src/docparser.cpp b/src/docparser.cpp
index 83887c6..6c10bdb 100644
--- a/src/docparser.cpp
+++ b/src/docparser.cpp
@@ -16,6 +16,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <cassert>
+#include <regex>
 
 #include <qfile.h>
 #include <qfileinfo.h>
@@ -425,7 +426,7 @@ static QCString findAndCopyImage(const char *fileName,DocImage::Type type, bool
  *  member g_memberDef, then a warning is raised (unless warnings
  *  are disabled altogether).
  */
-static void checkArgumentName(const QCString &name)
+static void checkArgumentName(const std::string &name)
 {
   if (!Config_getBool(WARN_IF_DOC_ERROR)) return;
   if (g_memberDef==0) return; // not a member
@@ -436,11 +437,13 @@ static void checkArgumentName(const QCString &name)
   //printf("isDocsForDefinition()=%d\n",g_memberDef->isDocsForDefinition());
   if (al.empty()) return; // no argument list
 
-  static QRegExp re("$?[a-zA-Z0-9_\\x80-\\xFF]+\\.*");
-  int p=0,i=0,l;
-  while ((i=re.match(name,p,&l))!=-1) // to handle @param x,y
+  static std::regex re("(\\$[[:alnum:]_]|[[:alpha:]_])[[:alnum:]_]*\\.*");
+  std::sregex_iterator it(name.begin(),name.end(),re);
+  std::sregex_iterator end;
+  for (; it!=end ; ++it)
   {
-    QCString aName=name.mid(i,l);
+    const auto &match = *it;
+    QCString aName=match.str();
     if (lang==SrcLangExt_Fortran) aName=aName.lower();
     //printf("aName='%s'\n",aName.data());
     bool found=FALSE;
@@ -482,7 +485,6 @@ static void checkArgumentName(const QCString &name)
 	  qPrint(aName), qPrint(scope), qPrint(g_memberDef->name()),
 	  qPrint(alStr), qPrint(inheritedFrom));
     }
-    p=i+l;
   }
 }
 /*! Collects the return values found with \@retval command
@@ -872,9 +874,9 @@ static int handleStyleArgument(DocNode *parent,DocNodeList &children,
           tok!=TK_ENDLIST
         )
   {
-    static QRegExp specialChar("[.,|()\\[\\]:;\\?]");
+    static std::regex specialChar("[.,|()\\[\\]:;\\?]");
     if (tok==TK_WORD && g_token->name.length()==1 &&
-        g_token->name.find(specialChar)!=-1)
+        std::regex_match(g_token->name.str(),specialChar))
     {
       // special character that ends the markup command
       return tok;
@@ -4533,13 +4535,13 @@ int DocParamList::parse(const QCString &cmdName)
         handleParameterType(this,m_paramTypes,g_token->name.left(typeSeparator));
         g_token->name = g_token->name.mid(typeSeparator+1);
         g_hasParamCommand=TRUE;
-        checkArgumentName(g_token->name);
+        checkArgumentName(g_token->name.str());
         ((DocParamSect*)parent())->m_hasTypeSpecifier=TRUE;
       }
       else
       {
         g_hasParamCommand=TRUE;
-        checkArgumentName(g_token->name);
+        checkArgumentName(g_token->name.str());
       }
     }
     else if (m_type==DocParamSect::RetVal)
@@ -4591,7 +4593,7 @@ int DocParamList::parseXml(const QCString &paramName)
   if (m_type==DocParamSect::Param)
   {
     g_hasParamCommand=TRUE;
-    checkArgumentName(g_token->name);
+    checkArgumentName(g_token->name.str());
   }
   else if (m_type==DocParamSect::RetVal)
   {
-- 
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