From 2bd5ec87055c48d7b48ad601f32368a37d5ecc2b Mon Sep 17 00:00:00 2001
From: Dan Paulat <dpaulat@gmail.com>
Date: Mon, 11 Dec 2023 07:07:34 -0600
Subject: [PATCH] Finish migrating std::regex to RE2

---
 .../source/scwx/qt/manager/update_manager.cpp | 14 ++++---------
 scwx-qt/source/scwx/qt/map/map_widget.cpp     | 18 ++++++++---------
 .../scwx/qt/settings/palette_settings.cpp     |  7 +++----
 test/source/scwx/qt/map/map_provider.test.cpp | 20 +++++++++----------
 4 files changed, 26 insertions(+), 33 deletions(-)

diff --git a/scwx-qt/source/scwx/qt/manager/update_manager.cpp b/scwx-qt/source/scwx/qt/manager/update_manager.cpp
index 213354ec..08304263 100644
--- a/scwx-qt/source/scwx/qt/manager/update_manager.cpp
+++ b/scwx-qt/source/scwx/qt/manager/update_manager.cpp
@@ -2,10 +2,10 @@
 #include <scwx/util/logger.hpp>
 
 #include <mutex>
-#include <regex>
 
 #include <boost/json.hpp>
 #include <cpr/cpr.h>
+#include <re2/re2.h>
 
 namespace scwx
 {
@@ -61,16 +61,10 @@ std::string UpdateManager::latest_version() const
 std::string
 UpdateManager::Impl::GetVersionString(const std::string& releaseName)
 {
-   static const std::regex re {"\\d+\\.\\d+\\.\\d+"};
-   std::string             versionString {};
-   std::smatch             m;
+   static constexpr LazyRE2 re = {"(\\d+\\.\\d+\\.\\d+)"};
+   std::string              versionString {};
 
-   std::regex_search(releaseName, m, re);
-
-   if (!m.empty())
-   {
-      versionString = m[0].str();
-   }
+   RE2::PartialMatch(releaseName, *re, &versionString);
 
    return versionString;
 }
diff --git a/scwx-qt/source/scwx/qt/map/map_widget.cpp b/scwx-qt/source/scwx/qt/map/map_widget.cpp
index a897748b..ebef32e7 100644
--- a/scwx-qt/source/scwx/qt/map/map_widget.cpp
+++ b/scwx-qt/source/scwx/qt/map/map_widget.cpp
@@ -23,7 +23,6 @@
 #include <scwx/util/logger.hpp>
 #include <scwx/util/time.hpp>
 
-#include <regex>
 #include <set>
 
 #include <backends/imgui_impl_opengl3.h>
@@ -33,6 +32,7 @@
 #include <boost/uuid/random_generator.hpp>
 #include <fmt/format.h>
 #include <imgui.h>
+#include <re2/re2.h>
 #include <QApplication>
 #include <QColor>
 #include <QDebug>
@@ -769,14 +769,14 @@ std::string MapWidgetImpl::FindMapSymbologyLayer()
       const std::string layer = qlayer.toStdString();
 
       // Draw below layers defined in map style
-      auto it = std::find_if(
-         currentStyle_->drawBelow_.cbegin(),
-         currentStyle_->drawBelow_.cend(),
-         [&layer](const std::string& styleLayer) -> bool
-         {
-            std::regex re {styleLayer, std::regex_constants::icase};
-            return std::regex_match(layer, re);
-         });
+      auto it = std::find_if(currentStyle_->drawBelow_.cbegin(),
+                             currentStyle_->drawBelow_.cend(),
+                             [&layer](const std::string& styleLayer) -> bool
+                             {
+                                // Perform case-insensitive matching
+                                RE2 re {"(?i)" + styleLayer};
+                                return RE2::FullMatch(layer, re);
+                             });
 
       if (it != currentStyle_->drawBelow_.cend())
       {
diff --git a/scwx-qt/source/scwx/qt/settings/palette_settings.cpp b/scwx-qt/source/scwx/qt/settings/palette_settings.cpp
index 8133a452..dcf58f2e 100644
--- a/scwx-qt/source/scwx/qt/settings/palette_settings.cpp
+++ b/scwx-qt/source/scwx/qt/settings/palette_settings.cpp
@@ -2,10 +2,9 @@
 #include <scwx/qt/settings/settings_variable.hpp>
 #include <scwx/qt/util/color.hpp>
 
-#include <regex>
-
 #include <boost/gil.hpp>
 #include <fmt/format.h>
+#include <re2/re2.h>
 
 namespace scwx
 {
@@ -134,8 +133,8 @@ class PaletteSettings::Impl
 
 bool PaletteSettings::Impl::ValidateColor(const std::string& value)
 {
-   static const std::regex re {"#[0-9A-Za-z]{8}"};
-   return std::regex_match(value, re);
+   static constexpr LazyRE2 re = {"#[0-9A-Fa-f]{8}"};
+   return RE2::FullMatch(value, *re);
 }
 
 PaletteSettings::PaletteSettings() :
diff --git a/test/source/scwx/qt/map/map_provider.test.cpp b/test/source/scwx/qt/map/map_provider.test.cpp
index f3883992..8b330de9 100644
--- a/test/source/scwx/qt/map/map_provider.test.cpp
+++ b/test/source/scwx/qt/map/map_provider.test.cpp
@@ -2,13 +2,12 @@
 #include <scwx/util/environment.hpp>
 #include <scwx/util/logger.hpp>
 
-#include <regex>
-
 #include <QCoreApplication>
 #include <QMapLibreGL/QMapLibreGL>
 #include <QTimer>
 
 #include <gtest/gtest.h>
+#include <re2/re2.h>
 
 namespace scwx
 {
@@ -108,14 +107,15 @@ TEST_P(ByMapProviderTest, MapProviderLayers)
             const std::string layer = qlayer.toStdString();
 
             // Draw below layers defined in map style
-            auto it = std::find_if(
-               mapStyle.drawBelow_.cbegin(),
-               mapStyle.drawBelow_.cend(),
-               [&layer](const std::string& styleLayer) -> bool
-               {
-                  std::regex re {styleLayer, std::regex_constants::icase};
-                  return std::regex_match(layer, re);
-               });
+            auto it =
+               std::find_if(mapStyle.drawBelow_.cbegin(),
+                            mapStyle.drawBelow_.cend(),
+                            [&layer](const std::string& styleLayer) -> bool
+                            {
+                               // Perform case insensitive matching
+                               RE2 re {"(?i)" + styleLayer};
+                               return RE2::FullMatch(layer, re);
+                            });
 
             if (it != mapStyle.drawBelow_.cend())
             {