Boost regex engine

[zufuliu]

See PR #722, @atauzki 👍 is working on integrating Boost regex , after the changes are merged most if not all regex issues should be fixed.

At the end our code will have three regex engines:

defined preprocessors	regex engine
BOOST_REGEX_STANDALONE	Scintilla's simple POSIX regex plus Boost regex
NO_CXX11_REGEX	Scintilla's simple POSIX regex (current build configuration)
none	Scintilla's simple POSIX regex plus C++ STL std::regex

[zufuliu]

Some TODOs:

• Ensure all existing use of regex still works after change to Boost.
• Update regex help string, add common syntax like a|b, {n,m}, etc. based on https://www.boost.org/doc/libs/1_83_0/libs/regex/doc/html/boost_regex/syntax/perl_syntax.html, https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Regular_expressions and https://docs.python.org/3/library/re.html
• Add option to select regex engine (Boost Unicode, Boost ASCII, Scintilla ASCII), could default to Boost Unicode.
• Add option "Dot match all character (include new line)" or "Multiline mode" on Find and Replace dialogs, issue Multiline regular expressions #53.

[atauzki]

Another suggestion:
zero-width match's hints should be improved like Notepad3:

[zufuliu]

following is some performance test results (match count and time in millisecond) for attached JSON file (produced by expand.py in the zip for Visual Studio 2022 instalation catalog.json) with commit 38be0ce. As such I'm going to remove SCI_OWNREGEX build configuration (still needs time to improve the speed).
re-test-1015.zip

regex	RESearch	std::wregex	std::regex	boost::wregex	boost::regex
\w+	1434315, 315	1436523, 7636	1423835, 4372	1436523, 2035	1501396, 800
[a-zA-Z0-9_]+	1423835, 331	1423835, 7654	1423835, 4386	1423835, 2855	1423835, 777
\d+	1028016, 280	1028016, 6470	1028016, 6475	1028016, 2050	1028016, 739
[0-9]+	1028016, 286	1028016, 6475	1028016, 6218	1028016, 2044	1028016,725
\s+	895401, 252	895945, 6151	895403, 5972	895917, 1883	911355, 662
[ \t]+	895401, 254	895401, 6375	895401, 6200	895401, 2935	895401, 678
^[ \t]+	440216, 92	440216, 846	440216, 724	440216, 465	440216, 234
[ \t]+$	0, 154	0, 6492	0, 6324	0, 575	0, 84

[lenny20]

今天发布的版本有没有包含Boost regex ？？我看替换对话框没啥变化哦。

[zufuliu]

今天发布的版本有没有包含Boost regex

Just download latest builds from boost regex branch, e.g. https://github.com/zufuliu/notepad2/actions/runs/7517811166

[zufuliu]

Win32 build with boost::regex (depends on SleepConditionVariableSRW() and WakeAllConditionVariable()) or std::regex (depends on InitializeCriticalSectionEx()) doesn't run on XP.

[vvyoko]

请问下boost::regex是不支持匹配\pP这种属性匹配吗
更多测试属性 正则表达式-匹配标点符号

另外匹配的(pattern)目前是用 \1,\2引用
将来会考虑用常用的$1,$2代替吗

[zufuliu]

Seems not supported (requires ICU).
https://www.boost.org/doc/libs/1_85_0/libs/regex/doc/html/boost_regex/unicode.html
https://www.boost.org/doc/libs/1_85_0/libs/regex/doc/html/boost_regex/syntax/perl_syntax.html#boost_regex.syntax.perl_syntax.character_properties

[atauzki]

另外匹配的(pattern)目前是用 \1,\2引用
将来会考虑用常用的$1,$2代替吗

boost本身支持，但是现在的代码没有用这个实现，只加了个TODO注释

[zufuliu]

Win32 build with boost::regex (depends on SleepConditionVariableSRW() and WakeAllConditionVariable()) or std::regex (depends on InitializeCriticalSectionEx()) doesn't run on XP.

This can be "fixed" by disabling thread-safe local static initialization with /Zc:threadSafeInit-:
https://learn.microsoft.com/en-us/cpp/build/reference/zc-threadsafeinit-thread-safe-local-static-initialization?view=msvc-170

The implementation of this feature relies on Windows operating system support functions in Windows Vista and later operating systems.

[atauzki]

Another bug related to boost regex search:
if execute a zero-width match (eg: ^, $, \b) searching next/previous for multiple times, it just stucks at its original place from the second time.
Emeditor also has this bug but Notepad3 doesn't, I had no good idea working on this.

[atauzki]

请问下boost::regex是不支持匹配\pP这种属性匹配吗
更多测试属性 正则表达式-匹配标点符号

libICU编译出来至少20-30M吧，代价太大。要支持这个功能可以用PCRE2，就看有没有这个计划了

[zufuliu]

libICU编译出来至少20-30M吧，代价太大。

Maybe dynamic load ICU (which is available on Win10+), https://learn.microsoft.com/en-us/windows/win32/intl/international-components-for-unicode--icu-

[atauzki]

libICU编译出来至少20-30M吧，代价太大。

Maybe dynamic load ICU (which is available on Win10+), https://learn.microsoft.com/en-us/windows/win32/intl/international-components-for-unicode--icu-

it doesn't have icu namespace in it's icu.h, but boost uses icu's c++ api. And no C++ symbol exported in icu.dll.