diff --git a/CMakeLists.txt b/CMakeLists.txt
index 42f81b28..04764845 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,10 +4,10 @@ if (POLICY CMP0177)
 	cmake_policy(SET CMP0177 OLD)
 endif()
 project(PIP)
-set(PIP_MAJOR    4)
-set(PIP_MINOR    8)
+set(PIP_MAJOR    5)
+set(PIP_MINOR    0)
 set(PIP_REVISION 0)
-set(PIP_SUFFIX   )
+set(PIP_SUFFIX   _beta)
 set(PIP_COMPANY  SHS)
 set(PIP_DOMAIN   org.SHS)
 
@@ -371,6 +371,9 @@ set(PCRE2_BUILD_PCRE2_32  OFF)
 set(PCRE2_BUILD_PCRE2GREP OFF)
 set(PCRE2_BUILD_TESTS     OFF)
 set(PCRE2_SHOW_REPORT     OFF)
+if (WIN32)
+	set (ZLIB_ROOT "${MINGW_INCLUDE}")
+endif()
 add_subdirectory("3rd/pcre2" EXCLUDE_FROM_ALL)
 list(APPEND LIBS_MAIN pcre2-16-static)
 
diff --git a/libs/main/io_devices/pidir.cpp b/libs/main/io_devices/pidir.cpp
index 341b2446..bb0607b4 100644
--- a/libs/main/io_devices/pidir.cpp
+++ b/libs/main/io_devices/pidir.cpp
@@ -298,9 +298,9 @@ bool sort_compare(const PIFile::FileInfo & v0, const PIFile::FileInfo & v1) {
 //! также "." и "..". Возвращаются абсолютные пути.
 //! \attention Этот метод не читает содержимое директорий
 //! рекурсивно!
-PIVector<PIFile::FileInfo> PIDir::entries() {
-	PIVector<PIFile::FileInfo> l;
-	if (!isExists()) return l;
+PIVector<PIFile::FileInfo> PIDir::entries(const PIRegularExpression & regexp) {
+	if (!isExists()) return {};
+	PIVector<PIFile::FileInfo> ret;
 	PIString dp = absolutePath();
 	PIString p(dp);
 	if (dp == ".")
@@ -309,9 +309,9 @@ PIVector<PIFile::FileInfo> PIDir::entries() {
 		dp += separator;
 //	piCout << "start entries from" << p;
 #ifdef WINDOWS
+	PIFile::FileInfo fi;
 	if (dp == separator) {
 		char letters[1024];
-		PIFile::FileInfo fi;
 		DWORD ll = GetLogicalDriveStringsA(1023, letters);
 		PIString clet;
 		for (DWORD i = 0; i < ll; ++i) {
@@ -319,7 +319,12 @@ PIVector<PIFile::FileInfo> PIDir::entries() {
 				clet.resize(2);
 				fi.path  = clet;
 				fi.flags = PIFile::FileInfo::Dir;
-				l << fi;
+				if (regexp.isValid()) {
+					if (regexp.match(fi.name())) {
+						ret << fi;
+					}
+				} else
+					ret << fi;
 				clet.clear();
 			} else
 				clet += PIChar(letters[i]);
@@ -329,21 +334,27 @@ PIVector<PIFile::FileInfo> PIDir::entries() {
 		piZeroMemory(fd);
 		p += "\\*";
 		void * hf = FindFirstFileA((LPCSTR)(p.data()), &fd);
-		if (!hf) return l;
+		if (!hf) return ret;
 		bool hdd = false;
 		do {
 			PIString fn(fd.cFileName);
 			if (fn == "..") hdd = true;
-			l << PIFile::fileInfo(dp + fn);
+			fi = PIFile::fileInfo(dp + fn);
+			if (regexp.isValid()) {
+				if (regexp.match(fi.name())) {
+					ret << fi;
+				}
+			} else
+				ret << fi;
 			piZeroMemory(fd);
 		} while (FindNextFileA(hf, &fd) != 0);
 		FindClose(hf);
-		l.sort(sort_compare);
+		ret.sort(sort_compare);
 		if (!hdd) {
 			PIFile::FileInfo fi;
 			fi.path  = "..";
 			fi.flags = PIFile::FileInfo::Dir | PIFile::FileInfo::DotDot;
-			l.push_front(fi);
+			ret.push_front(fi);
 		}
 	}
 
@@ -356,7 +367,7 @@ PIVector<PIFile::FileInfo> PIDir::entries() {
 		for (;;) {
 			de = readdir(dir);
 			if (!de) break;
-			l << PIFile::fileInfo(dp + PIString(de->d_name));
+			ret << PIFile::fileInfo(dp + PIString(de->d_name));
 		}
 		closedir(dir);
 	}
@@ -371,14 +382,14 @@ PIVector<PIFile::FileInfo> PIDir::entries() {
 	                  versionsort);
 #	endif
 	for (int i = 0; i < cnt; ++i) {
-		l << PIFile::fileInfo(dp + PIString(list[i]->d_name));
+		ret << PIFile::fileInfo(dp + PIString(list[i]->d_name));
 		free(list[i]);
 	}
 	free(list);
 #  endif
 #endif
 	//	piCout << "end entries from" << p;
-	return l;
+	return ret;
 }
 
 
@@ -394,7 +405,7 @@ PIVector<PIFile::FileInfo> PIDir::entries() {
 //! одним списком, сортированным по алфавиту. Список не содержит
 //! "." и "..". Возвращаются абсолютные пути, причём файлы
 //! располагаются после директорий.
-PIVector<PIFile::FileInfo> PIDir::allEntries() {
+PIVector<PIFile::FileInfo> PIDir::allEntries(const PIRegularExpression & regexp) {
 	PIVector<PIFile::FileInfo> ret;
 	PIVector<PIFile::FileInfo> dirs;
 	PIStringList cdirs, ndirs;
@@ -409,8 +420,14 @@ PIVector<PIFile::FileInfo> PIDir::allEntries() {
 				if (de.isDir()) {
 					dirs << de;
 					ndirs << de.path;
-				} else
+				} else {
+					if (regexp.isValid()) {
+						if (!regexp.match(de.name())) {
+							continue;
+						}
+					}
 					ret << de;
+				}
 			}
 		}
 		cdirs = ndirs;
@@ -516,8 +533,8 @@ PIDir PIDir::temporary() {
 }
 
 
-PIVector<PIFile::FileInfo> PIDir::allEntries(const PIString & path) {
-	return PIDir(path).allEntries();
+PIVector<PIFile::FileInfo> PIDir::allEntries(const PIString & path, const PIRegularExpression & regexp) {
+	return PIDir(path).allEntries(regexp);
 }
 
 
diff --git a/libs/main/io_devices/pidir.h b/libs/main/io_devices/pidir.h
index 5d31e330..f97efdf8 100644
--- a/libs/main/io_devices/pidir.h
+++ b/libs/main/io_devices/pidir.h
@@ -27,6 +27,7 @@
 #define PIDIR_H
 
 #include "pifile.h"
+#include "piregularexpression.h"
 
 
 //! \ingroup IO
@@ -104,11 +105,11 @@ public:
 
 	//! \~english Returns this directory content
 	//! \~russian Возвращает содержимое этой директории
-	PIVector<PIFile::FileInfo> entries();
+	PIVector<PIFile::FileInfo> entries(const PIRegularExpression & regexp = {});
 
 	//! \~english Returns this directory content recursively
 	//! \~russian Возвращает содержимое этой директории рекурсивно
-	PIVector<PIFile::FileInfo> allEntries();
+	PIVector<PIFile::FileInfo> allEntries(const PIRegularExpression & regexp = {});
 
 	//! \~english Make this directory, recursively if "withParents"
 	//! \~russian Создаёт эту директорию, рекурсивно если "withParents"
@@ -155,7 +156,7 @@ public:
 
 	//! \~english Returns directory "path" content recursively
 	//! \~russian Возвращает содержимое директории "path" рекурсивно
-	static PIVector<PIFile::FileInfo> allEntries(const PIString & path);
+	static PIVector<PIFile::FileInfo> allEntries(const PIString & path, const PIRegularExpression & regexp = {});
 
 	//! \~english Returns if directory "path" exists
 	//! \~russian Возвращает существует ли эта директория
diff --git a/libs/main/literals/piliterals.h b/libs/main/literals/piliterals.h
index 845d4ab6..88b58d59 100644
--- a/libs/main/literals/piliterals.h
+++ b/libs/main/literals/piliterals.h
@@ -12,7 +12,7 @@
  */
 /*
     PIP - Platform Independent Primitives
-	C++11 literals
+    C++11 literals
     Ivan Pelipenko peri4ko@yandex.ru
 
     This program is free software: you can redistribute it and/or modify
@@ -34,6 +34,7 @@
 
 #include "piliterals_bytearray.h"
 #include "piliterals_bytes.h"
+#include "piliterals_regularexpression.h"
 #include "piliterals_string.h"
 #include "piliterals_time.h"
 
diff --git a/libs/main/literals/piliterals_regularexpression.h b/libs/main/literals/piliterals_regularexpression.h
new file mode 100644
index 00000000..9e47b8f7
--- /dev/null
+++ b/libs/main/literals/piliterals_regularexpression.h
@@ -0,0 +1,46 @@
+/*! \file piliterals_regularexpression.h
+ * \ingroup Core
+ * \~\brief
+ * \~english PIRegularExpression C++11 literals
+ * \~russian C++11 суффиксы PIString
+ */
+/*
+    PIP - Platform Independent Primitives
+    PIRegularExpression C++11 literals
+    Ivan Pelipenko peri4ko@yandex.ru
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef PILITERALS_REGULAREXPRESSION_H
+#define PILITERALS_REGULAREXPRESSION_H
+
+#include "piregularexpression.h"
+
+//! \~\brief
+//! \~english PIRegularExpression from string pattern in PCRE2 format
+//! \~russian PIRegularExpression из строки в формате PCRE2
+inline PIRegularExpression operator""_regex(const char * v, size_t sz) {
+	return PIRegularExpression(PIString::fromUTF8(v, sz));
+}
+
+//! \~\brief
+//! \~english PIRegularExpression from string pattern in Glob format
+//! \~russian PIRegularExpression из строки в формате Glob
+inline PIRegularExpression operator""_glob(const char * v, size_t sz) {
+	return PIRegularExpression::fromGlob(PIString::fromUTF8(v, sz));
+}
+
+
+#endif
diff --git a/libs/main/text/piregularexpression.cpp b/libs/main/text/piregularexpression.cpp
index 04bc4b74..cb0470c3 100644
--- a/libs/main/text/piregularexpression.cpp
+++ b/libs/main/text/piregularexpression.cpp
@@ -192,25 +192,8 @@ int PIRegularExpression::captureGroupIndex(const PIString & gname) const {
 }
 
 
-PIRegularExpression::Matcher PIRegularExpression::matchIterator(PIString & subject, size_t offset) {
-	PIRegularExpression::Matcher ret(this);
-	ret.start_offset = offset;
-	ret.subject      = &subject;
-	return ret;
-}
-
-
-PIRegularExpression::Matcher PIRegularExpression::matchIterator(PIString && subject, size_t offset) {
-	PIRegularExpression::Matcher ret(this);
-	ret.start_offset = offset;
-	ret.subject_own  = std::move(subject);
-	ret.subject      = &ret.subject_own;
-	return ret;
-}
-
-
-PIRegularExpression::Matcher PIRegularExpression::matchIterator(const PIString & subject, size_t offset) {
-	PIRegularExpression::Matcher ret(this);
+PIRegularExpression::Matcher PIRegularExpression::matchIterator(const PIString & subject, size_t offset) const {
+	PIRegularExpression::Matcher ret(const_cast<PIRegularExpression *>(this));
 	ret.start_offset = offset;
 	ret.subject_own  = subject;
 	ret.subject      = &ret.subject_own;
@@ -218,27 +201,44 @@ PIRegularExpression::Matcher PIRegularExpression::matchIterator(const PIString &
 }
 
 
-PIRegularExpression::Matcher PIRegularExpression::match(PIString & subject, size_t offset) {
+PIRegularExpression::Matcher PIRegularExpression::matchIterator(PIString & subject, size_t offset) const {
+	PIRegularExpression::Matcher ret(const_cast<PIRegularExpression *>(this));
+	ret.start_offset = offset;
+	ret.subject      = &subject;
+	return ret;
+}
+
+
+PIRegularExpression::Matcher PIRegularExpression::matchIterator(PIString && subject, size_t offset) const {
+	PIRegularExpression::Matcher ret(const_cast<PIRegularExpression *>(this));
+	ret.start_offset = offset;
+	ret.subject_own  = std::move(subject);
+	ret.subject      = &ret.subject_own;
+	return ret;
+}
+
+
+PIRegularExpression::Matcher PIRegularExpression::match(const PIString & subject, size_t offset) const {
 	PIRegularExpression::Matcher ret = matchIterator(subject, offset);
 	PRIVATE->match(ret);
 	return ret;
 }
 
 
-PIRegularExpression::Matcher PIRegularExpression::match(PIString && subject, size_t offset) {
+PIRegularExpression::Matcher PIRegularExpression::match(PIString & subject, size_t offset) const {
+	PIRegularExpression::Matcher ret = matchIterator(subject, offset);
+	PRIVATE->match(ret);
+	return ret;
+}
+
+
+PIRegularExpression::Matcher PIRegularExpression::match(PIString && subject, size_t offset) const {
 	PIRegularExpression::Matcher ret = matchIterator(std::move(subject), offset);
 	PRIVATE->match(ret);
 	return ret;
 }
 
 
-PIRegularExpression::Matcher PIRegularExpression::match(const PIString & subject, size_t offset) {
-	PIRegularExpression::Matcher ret = matchIterator(subject, offset);
-	PRIVATE->match(ret);
-	return ret;
-}
-
-
 PIRegularExpression::Matcher::Matcher(PIRegularExpression * p): parent(p) {}
 
 
diff --git a/libs/main/text/piregularexpression.h b/libs/main/text/piregularexpression.h
index bff92c71..e7bce887 100644
--- a/libs/main/text/piregularexpression.h
+++ b/libs/main/text/piregularexpression.h
@@ -103,13 +103,13 @@ public:
 	PIString captureGroupName(int index) const;
 	int captureGroupIndex(const PIString & gname) const;
 
-	Matcher match(const PIString & subject, size_t offset = 0);
-	Matcher match(PIString & subject, size_t offset = 0);
-	Matcher match(PIString && subject, size_t offset = 0);
+	Matcher match(const PIString & subject, size_t offset = 0) const;
+	Matcher match(PIString & subject, size_t offset = 0) const;
+	Matcher match(PIString && subject, size_t offset = 0) const;
 
-	Matcher matchIterator(const PIString & subject, size_t offset = 0);
-	Matcher matchIterator(PIString & subject, size_t offset = 0);
-	Matcher matchIterator(PIString && subject, size_t offset = 0);
+	Matcher matchIterator(const PIString & subject, size_t offset = 0) const;
+	Matcher matchIterator(PIString & subject, size_t offset = 0) const;
+	Matcher matchIterator(PIString && subject, size_t offset = 0) const;
 
 	static PIRegularExpression fromGlob(const PIString & pattern, Options opt = None);
 	static PIRegularExpression fromPOSIX(const PIString & pattern, Options opt = None);
diff --git a/libs/main/text/pistring.cpp b/libs/main/text/pistring.cpp
index e9b37fad..ec09bf65 100644
--- a/libs/main/text/pistring.cpp
+++ b/libs/main/text/pistring.cpp
@@ -998,6 +998,11 @@ PIStringList PIString::split(const PIString & delim) const {
 }
 
 
+bool PIString::contains(const PIRegularExpression & regexp) const {
+	return regexp.match(const_cast<PIString &>(*this)).hasMatch();
+}
+
+
 //! \~\details
 //! \~\code
 //! PIString s("012345012345");
@@ -1033,6 +1038,11 @@ int PIString::find(const PIString & str, const int start) const {
 }
 
 
+int PIString::find(const PIRegularExpression & regexp, const int start) const {
+	return regexp.match(const_cast<PIString &>(*this), start).matchedStart();
+}
+
+
 //! \~\details
 //! \~\code
 //! piCout << PIString("1.str").findAny(".,:"); // 1
@@ -1090,6 +1100,16 @@ int PIString::findLast(const PIString & str, const int start) const {
 }
 
 
+int PIString::findLast(const PIRegularExpression & regexp, const int start) const {
+	auto m  = regexp.match(const_cast<PIString &>(*this), start);
+	int ret = m.matchedStart();
+	while (m.next()) {
+		ret = m.matchedStart();
+	}
+	return ret;
+}
+
+
 //! \~\details
 //! \~\code
 //! piCout << PIString(".str.0").findAnyLast(".,:"); // 4
diff --git a/libs/main/text/pistring.h b/libs/main/text/pistring.h
index ffc17c84..014928c3 100644
--- a/libs/main/text/pistring.h
+++ b/libs/main/text/pistring.h
@@ -33,6 +33,7 @@
 
 
 class PIStringList;
+class PIRegularExpression;
 
 //! \ingroup Text
 //! \~\brief
@@ -1174,6 +1175,10 @@ public:
 	//! \~russian Возвращает содержит ли строка подстроку "str".
 	bool contains(const PIString & str) const { return find(str) >= 0; }
 
+	//! \~english Returns if string match "regexp".
+	//! \~russian Возвращает совпадает ли строка "regexp".
+	bool contains(const PIRegularExpression & regexp) const;
+
 
 	//! \~english Search character "c" from character at index "start" and return first occur position.
 	//! \~russian Ищет символ "c" от символа "start" и возвращает первое вхождение.
@@ -1200,6 +1205,10 @@ public:
 	//! \~\sa \a findAny(), \a findLast(), \a findAnyLast(), \a findWord(), \a findCWord(), \a findRange()
 	int find(const char * str, const int start = 0) const { return find(PIString(str), start); }
 
+	//! \~english Search match of "regexp" from character at index "start" and return first occur position.
+	//! \~russian Ищет совпадение с "regexp" от символа "start" и возвращает первое вхождение.
+	int find(const PIRegularExpression & regexp, const int start = 0) const;
+
 	//! \~english Search any character of "str" from character at index "start" and return first occur position.
 	//! \~russian Ищет любой символ строки "str" от симола "start" и возвращает первое вхождение.
 	int findAny(const PIString & str, const int start = 0) const;
@@ -1240,6 +1249,10 @@ public:
 	//! \~\sa \a find(), \a findAny(), \a findAnyLast(), \a findWord(), \a findCWord(), \a findRange()
 	int findLast(const char * str, const int start = 0) const { return findLast(PIString(str), start); }
 
+	//! \~english Search match of "regexp" from character at index "start" and return last occur position.
+	//! \~russian Ищет совпадение с "regexp" от символа "start" и возвращает последнее вхождение.
+	int findLast(const PIRegularExpression & regexp, const int start = 0) const;
+
 	//! \~english Search any character of "str" from character at index "start" and return last occur position.
 	//! \~russian Ищет любой символ строки "str" от символа "start" и возвращает последнее вхождение.
 	int findAnyLast(const PIString & str, const int start = 0) const;