From 3d44eca405e4a930e75d7f50862e803c67ba98e3 Mon Sep 17 00:00:00 2001
From: Mike Dev <mike.dev@gmx.de>
Date: Sun, 16 Jun 2019 19:47:22 +0200
Subject: [PATCH] [CMake] Add option to build some of the examples

---
 CMakeLists.txt                  | 27 ++++++++++++++++++---------
 example/snippets/CMakeLists.txt | 30 ++++++++++++++++++++++++++++++
 2 files changed, 48 insertions(+), 9 deletions(-)
 create mode 100644 example/snippets/CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 598cbd9d..bce463c4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,19 +1,23 @@
-# Copyright 2018 Mike Dev
+# Copyright 2018-2019 Mike Dev
 # Distributed under the Boost Software License, Version 1.0.
-# See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt
+# See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
+#
+# NOTE: CMake support for Boost.Regex is currently experimental at best
+#       and the interface is likely to change in the future
 
-cmake_minimum_required(VERSION 3.5)
-project(BoostRegex LANGUAGES CXX)
+cmake_minimum_required( VERSION 3.5 )
+project( BoostRegex LANGUAGES CXX )
 
+option( BOOST_REGEX_INCLUDE_EXAMPLES "Also build (some) boost regex examples" OFF )
 
-file(GLOB BOOST_REGEX_SRC ./src/*.cpp)
+file( GLOB BOOST_REGEX_SRC ./src/*.cpp )
 
-add_library(boost_regex ${BOOST_REGEX_SRC})
-add_library(Boost::regex ALIAS boost_regex)
+add_library( boost_regex ${BOOST_REGEX_SRC} )
+add_library( Boost::regex ALIAS boost_regex )
 
-target_include_directories(boost_regex PUBLIC include)
+target_include_directories( boost_regex PUBLIC include )
 
-target_link_libraries(boost_regex
+target_link_libraries( boost_regex
     PUBLIC
         Boost::assert
         Boost::concept_check
@@ -29,3 +33,8 @@ target_link_libraries(boost_regex
         Boost::throw_exception
         Boost::type_traits
 )
+
+if( BOOST_REGEX_INCLUDE_EXAMPLES )
+    add_subdirectory( example/snippets )
+endif()
+
diff --git a/example/snippets/CMakeLists.txt b/example/snippets/CMakeLists.txt
new file mode 100644
index 00000000..f672785b
--- /dev/null
+++ b/example/snippets/CMakeLists.txt
@@ -0,0 +1,30 @@
+# Copyright 2019 Mike Dev
+# Distributed under the Boost Software License, Version 1.0.
+# See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
+#
+# NOTE: CMake support for Boost.Regex is currently experimental at best
+#       and we are currently only building a few examples
+
+set(examples 
+    partial_regex_grep
+    partial_regex_iterate
+    partial_regex_match
+    regex_grep_example_1
+    regex_grep_example_2
+    regex_grep_example_3
+    regex_grep_example_4
+    regex_iterator_example
+    regex_match_example
+    regex_merge_example
+    regex_replace_example
+    regex_search_example
+    regex_split_example_1
+    regex_split_example_2
+    regex_token_iterator_eg_1
+    regex_token_iterator_eg_2
+)
+
+foreach( example IN LISTS examples )
+    add_executable( boost_regex_ex_${example} ${example}.cpp )
+    target_link_libraries( boost_regex_ex_${example} Boost::regex )
+endforeach()