Reduce boost dependencies, no nuget import headers, bump to 1.86.0.

Makefile.am

@@ -33,7 +33,7 @@ doc_DATA = \
 #------------------------------------------------------------------------------
 lib_LTLIBRARIES = src/libbitcoin-network.la
 src_libbitcoin_network_la_CPPFLAGS = -I${srcdir}/include ${bitcoin_system_BUILD_CPPFLAGS}
-src_libbitcoin_network_la_LIBADD = ${boost_regex_LIBS} ${bitcoin_system_LIBS}
+src_libbitcoin_network_la_LIBADD = ${bitcoin_system_LIBS}
 src_libbitcoin_network_la_SOURCES = \
     src/error.cpp \
     src/memory.cpp \
@@ -122,7 +122,7 @@ TESTS = libbitcoin-network-test_runner.sh
 
 check_PROGRAMS = test/libbitcoin-network-test
 test_libbitcoin_network_test_CPPFLAGS = -I${srcdir}/include ${bitcoin_system_BUILD_CPPFLAGS}
-test_libbitcoin_network_test_LDADD = src/libbitcoin-network.la ${boost_unit_test_framework_LIBS} ${boost_regex_LIBS} ${bitcoin_system_LIBS}
+test_libbitcoin_network_test_LDADD = src/libbitcoin-network.la ${boost_unit_test_framework_LIBS} ${bitcoin_system_LIBS}
 test_libbitcoin_network_test_SOURCES = \
     test/error.cpp \
     test/main.cpp \

builds/cmake/CMakeLists.txt

@@ -140,11 +140,9 @@ endif()
 
 # Find boost
 #------------------------------------------------------------------------------
-find_package( Boost 1.76.0 REQUIRED COMPONENTS
-    regex
+find_package( Boost 1.86.0 REQUIRED COMPONENTS
     unit_test_framework )
 
-set( boost_regex_LIBS "-lboost_regex" )
 set( boost_unit_test_framework_LIBS "-lboost_unit_test_framework" )
 
 set( Boost_LIBRARY_DIR $<IF:$<BOOL:${enable-ndebug}>,"${Boost_LIBRARY_DIR_RELEASE}","${Boost_LIBRARY_DIR_DEBUG}">)
@@ -214,7 +212,6 @@ endif()
 # Define project common libraries.
 #------------------------------------------------------------------------------
 link_libraries(
-    ${Boost_REGEX_LIBRARY}
     ${bitcoin_system_FOR_BUILD_LIBRARIES} )
 
 # Define ${CANONICAL_LIB_NAME} project.
@@ -327,7 +324,6 @@ endif()
 # ${CANONICAL_LIB_NAME} project specific libraries/linker flags.
 #------------------------------------------------------------------------------
 target_link_libraries( ${CANONICAL_LIB_NAME}
-    ${Boost_REGEX_LIBRARY}
     ${bitcoin_system_FOR_BUILD_LIBRARIES} )
 
 # Define libbitcoin-network-test project.

builds/msvc/vs2022/libbitcoin-network-test/libbitcoin-network-test.props

@@ -12,7 +12,6 @@
   <ItemDefinitionGroup>
     <ClCompile>
       <EnablePREfast>false</EnablePREfast>
-      <!--<PreprocessorDefinitions Condition="'$(DefaultLinkage)' == 'dynamic'">BOOST_TEST_DYN_LINK;%(PreprocessorDefinitions)</PreprocessorDefinitions>-->
     </ClCompile>
     <PostBuildEvent Condition="'$(DebugOrRelease)' == 'release'">
       <Command>"$(TargetPath)" --log_level=warning --run_test=* --show_progress=no --build_info=yes</Command>

builds/msvc/vs2022/libbitcoin-network-test/libbitcoin-network-test.vcxproj

@@ -220,14 +220,9 @@
   <ImportGroup Label="ExtensionTargets" />
   <ImportGroup Label="ExtensionSettings">
     <Import Project="$(NuGetPackageRoot)boost.1.86.0\build\boost.targets" Condition="Exists('$(NuGetPackageRoot)boost.1.86.0\build\boost.targets')" />
-    <Import Project="$(NuGetPackageRoot)boost_regex-vc143.1.86.0\build\boost_regex-vc143.targets" Condition="Exists('$(NuGetPackageRoot)boost_regex-vc143.1.86.0\build\boost_regex-vc143.targets')" />
-    <Import Project="$(NuGetPackageRoot)boost_chrono-vc143.1.86.0\build\boost_chrono-vc143.targets" Condition="Exists('$(NuGetPackageRoot)boost_chrono-vc143.1.86.0\build\boost_chrono-vc143.targets')" />
-    <Import Project="$(NuGetPackageRoot)boost_container-vc143.1.86.0\build\boost_container-vc143.targets" Condition="Exists('$(NuGetPackageRoot)boost_container-vc143.1.86.0\build\boost_container-vc143.targets')" />
     <Import Project="$(NuGetPackageRoot)boost_iostreams-vc143.1.86.0\build\boost_iostreams-vc143.targets" Condition="Exists('$(NuGetPackageRoot)boost_iostreams-vc143.1.86.0\build\boost_iostreams-vc143.targets')" />
-    <Import Project="$(NuGetPackageRoot)boost_json-vc143.1.86.0\build\boost_json-vc143.targets" Condition="Exists('$(NuGetPackageRoot)boost_json-vc143.1.86.0\build\boost_json-vc143.targets')" />
     <Import Project="$(NuGetPackageRoot)boost_locale-vc143.1.86.0\build\boost_locale-vc143.targets" Condition="Exists('$(NuGetPackageRoot)boost_locale-vc143.1.86.0\build\boost_locale-vc143.targets')" />
     <Import Project="$(NuGetPackageRoot)boost_program_options-vc143.1.86.0\build\boost_program_options-vc143.targets" Condition="Exists('$(NuGetPackageRoot)boost_program_options-vc143.1.86.0\build\boost_program_options-vc143.targets')" />
-    <Import Project="$(NuGetPackageRoot)boost_system-vc143.1.86.0\build\boost_system-vc143.targets" Condition="Exists('$(NuGetPackageRoot)boost_system-vc143.1.86.0\build\boost_system-vc143.targets')" />
     <Import Project="$(NuGetPackageRoot)boost_thread-vc143.1.86.0\build\boost_thread-vc143.targets" Condition="Exists('$(NuGetPackageRoot)boost_thread-vc143.1.86.0\build\boost_thread-vc143.targets')" />
     <Import Project="$(NuGetPackageRoot)secp256k1_vc143.0.1.0.21\build\native\secp256k1_vc143.targets" Condition="Exists('$(NuGetPackageRoot)secp256k1_vc143.0.1.0.21\build\native\secp256k1_vc143.targets')" />
     <Import Project="$(NuGetPackageRoot)boost_unit_test_framework-vc143.1.86.0\build\boost_unit_test_framework-vc143.targets" Condition="Exists('$(NuGetPackageRoot)boost_unit_test_framework-vc143.1.86.0\build\boost_unit_test_framework-vc143.targets')" />
@@ -237,14 +232,9 @@
       <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
     </PropertyGroup>
     <Error Condition="!Exists('$(NuGetPackageRoot)boost.1.86.0\build\boost.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost.1.86.0\build\boost.targets'))" />
-    <Error Condition="!Exists('$(NuGetPackageRoot)boost_regex-vc143.1.86.0\build\boost_regex-vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost_regex-vc143.1.86.0\build\boost_regex-vc143.targets'))" />
-    <Error Condition="!Exists('$(NuGetPackageRoot)boost_chrono-vc143.1.86.0\build\boost_chrono-vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost_chrono-vc143.1.86.0\build\boost_chrono-vc143.targets'))" />
-    <Error Condition="!Exists('$(NuGetPackageRoot)boost_container-vc143.1.86.0\build\boost_container-vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost_container-vc143.1.86.0\build\boost_container-vc143.targets'))" />
     <Error Condition="!Exists('$(NuGetPackageRoot)boost_iostreams-vc143.1.86.0\build\boost_iostreams-vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost_iostreams-vc143.1.86.0\build\boost_iostreams-vc143.targets'))" />
-    <Error Condition="!Exists('$(NuGetPackageRoot)boost_json-vc143.1.86.0\build\boost_json-vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost_json-vc143.1.86.0\build\boost_json-vc143.targets'))" />
     <Error Condition="!Exists('$(NuGetPackageRoot)boost_locale-vc143.1.86.0\build\boost_locale-vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost_locale-vc143.1.86.0\build\boost_locale-vc143.targets'))" />
     <Error Condition="!Exists('$(NuGetPackageRoot)boost_program_options-vc143.1.86.0\build\boost_program_options-vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost_program_options-vc143.1.86.0\build\boost_program_options-vc143.targets'))" />
-    <Error Condition="!Exists('$(NuGetPackageRoot)boost_system-vc143.1.86.0\build\boost_system-vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost_system-vc143.1.86.0\build\boost_system-vc143.targets'))" />
     <Error Condition="!Exists('$(NuGetPackageRoot)boost_thread-vc143.1.86.0\build\boost_thread-vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost_thread-vc143.1.86.0\build\boost_thread-vc143.targets'))" />
     <Error Condition="!Exists('$(NuGetPackageRoot)secp256k1_vc143.0.1.0.21\build\native\secp256k1_vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)secp256k1_vc143.0.1.0.21\build\native\secp256k1_vc143.targets'))" />
     <Error Condition="!Exists('$(NuGetPackageRoot)boost_unit_test_framework-vc143.1.86.0\build\boost_unit_test_framework-vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost_unit_test_framework-vc143.1.86.0\build\boost_unit_test_framework-vc143.targets'))" />

builds/msvc/vs2022/libbitcoin-network-test/packages.config

@@ -7,14 +7,9 @@
  -->
 <packages>
   <package id="boost" version="1.86.0" targetFramework="Native" />
-  <package id="boost_regex-vc143" version="1.86.0" targetFramework="Native" />
-  <package id="boost_chrono-vc143" version="1.86.0" targetFramework="Native" />
-  <package id="boost_container-vc143" version="1.86.0" targetFramework="Native" />
   <package id="boost_iostreams-vc143" version="1.86.0" targetFramework="Native" />
-  <package id="boost_json-vc143" version="1.86.0" targetFramework="Native" />
   <package id="boost_locale-vc143" version="1.86.0" targetFramework="Native" />
   <package id="boost_program_options-vc143" version="1.86.0" targetFramework="Native" />
-  <package id="boost_system-vc143" version="1.86.0" targetFramework="Native" />
   <package id="boost_thread-vc143" version="1.86.0" targetFramework="Native" />
   <package id="secp256k1_vc143" version="0.1.0.21" targetFramework="Native" />
   <package id="boost_unit_test_framework-vc143" version="1.86.0" targetFramework="Native" />

builds/msvc/vs2022/libbitcoin-network/libbitcoin-network.vcxproj

@@ -330,14 +330,9 @@
   <ImportGroup Label="ExtensionTargets" />
   <ImportGroup Label="ExtensionSettings">
     <Import Project="$(NuGetPackageRoot)boost.1.86.0\build\boost.targets" Condition="Exists('$(NuGetPackageRoot)boost.1.86.0\build\boost.targets')" />
-    <Import Project="$(NuGetPackageRoot)boost_regex-vc143.1.86.0\build\boost_regex-vc143.targets" Condition="Exists('$(NuGetPackageRoot)boost_regex-vc143.1.86.0\build\boost_regex-vc143.targets')" />
-    <Import Project="$(NuGetPackageRoot)boost_chrono-vc143.1.86.0\build\boost_chrono-vc143.targets" Condition="Exists('$(NuGetPackageRoot)boost_chrono-vc143.1.86.0\build\boost_chrono-vc143.targets')" />
-    <Import Project="$(NuGetPackageRoot)boost_container-vc143.1.86.0\build\boost_container-vc143.targets" Condition="Exists('$(NuGetPackageRoot)boost_container-vc143.1.86.0\build\boost_container-vc143.targets')" />
     <Import Project="$(NuGetPackageRoot)boost_iostreams-vc143.1.86.0\build\boost_iostreams-vc143.targets" Condition="Exists('$(NuGetPackageRoot)boost_iostreams-vc143.1.86.0\build\boost_iostreams-vc143.targets')" />
-    <Import Project="$(NuGetPackageRoot)boost_json-vc143.1.86.0\build\boost_json-vc143.targets" Condition="Exists('$(NuGetPackageRoot)boost_json-vc143.1.86.0\build\boost_json-vc143.targets')" />
     <Import Project="$(NuGetPackageRoot)boost_locale-vc143.1.86.0\build\boost_locale-vc143.targets" Condition="Exists('$(NuGetPackageRoot)boost_locale-vc143.1.86.0\build\boost_locale-vc143.targets')" />
     <Import Project="$(NuGetPackageRoot)boost_program_options-vc143.1.86.0\build\boost_program_options-vc143.targets" Condition="Exists('$(NuGetPackageRoot)boost_program_options-vc143.1.86.0\build\boost_program_options-vc143.targets')" />
-    <Import Project="$(NuGetPackageRoot)boost_system-vc143.1.86.0\build\boost_system-vc143.targets" Condition="Exists('$(NuGetPackageRoot)boost_system-vc143.1.86.0\build\boost_system-vc143.targets')" />
     <Import Project="$(NuGetPackageRoot)boost_thread-vc143.1.86.0\build\boost_thread-vc143.targets" Condition="Exists('$(NuGetPackageRoot)boost_thread-vc143.1.86.0\build\boost_thread-vc143.targets')" />
     <Import Project="$(NuGetPackageRoot)secp256k1_vc143.0.1.0.21\build\native\secp256k1_vc143.targets" Condition="Exists('$(NuGetPackageRoot)secp256k1_vc143.0.1.0.21\build\native\secp256k1_vc143.targets')" />
   </ImportGroup>
@@ -346,14 +341,9 @@
       <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
     </PropertyGroup>
     <Error Condition="!Exists('$(NuGetPackageRoot)boost.1.86.0\build\boost.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost.1.86.0\build\boost.targets'))" />
-    <Error Condition="!Exists('$(NuGetPackageRoot)boost_regex-vc143.1.86.0\build\boost_regex-vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost_regex-vc143.1.86.0\build\boost_regex-vc143.targets'))" />
-    <Error Condition="!Exists('$(NuGetPackageRoot)boost_chrono-vc143.1.86.0\build\boost_chrono-vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost_chrono-vc143.1.86.0\build\boost_chrono-vc143.targets'))" />
-    <Error Condition="!Exists('$(NuGetPackageRoot)boost_container-vc143.1.86.0\build\boost_container-vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost_container-vc143.1.86.0\build\boost_container-vc143.targets'))" />
     <Error Condition="!Exists('$(NuGetPackageRoot)boost_iostreams-vc143.1.86.0\build\boost_iostreams-vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost_iostreams-vc143.1.86.0\build\boost_iostreams-vc143.targets'))" />
-    <Error Condition="!Exists('$(NuGetPackageRoot)boost_json-vc143.1.86.0\build\boost_json-vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost_json-vc143.1.86.0\build\boost_json-vc143.targets'))" />
     <Error Condition="!Exists('$(NuGetPackageRoot)boost_locale-vc143.1.86.0\build\boost_locale-vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost_locale-vc143.1.86.0\build\boost_locale-vc143.targets'))" />
     <Error Condition="!Exists('$(NuGetPackageRoot)boost_program_options-vc143.1.86.0\build\boost_program_options-vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost_program_options-vc143.1.86.0\build\boost_program_options-vc143.targets'))" />
-    <Error Condition="!Exists('$(NuGetPackageRoot)boost_system-vc143.1.86.0\build\boost_system-vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost_system-vc143.1.86.0\build\boost_system-vc143.targets'))" />
     <Error Condition="!Exists('$(NuGetPackageRoot)boost_thread-vc143.1.86.0\build\boost_thread-vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost_thread-vc143.1.86.0\build\boost_thread-vc143.targets'))" />
     <Error Condition="!Exists('$(NuGetPackageRoot)secp256k1_vc143.0.1.0.21\build\native\secp256k1_vc143.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)secp256k1_vc143.0.1.0.21\build\native\secp256k1_vc143.targets'))" />
   </Target>

builds/msvc/vs2022/libbitcoin-network/packages.config

@@ -7,14 +7,9 @@
  -->
 <packages>
   <package id="boost" version="1.86.0" targetFramework="Native" />
-  <package id="boost_regex-vc143" version="1.86.0" targetFramework="Native" />
-  <package id="boost_chrono-vc143" version="1.86.0" targetFramework="Native" />
-  <package id="boost_container-vc143" version="1.86.0" targetFramework="Native" />
   <package id="boost_iostreams-vc143" version="1.86.0" targetFramework="Native" />
-  <package id="boost_json-vc143" version="1.86.0" targetFramework="Native" />
   <package id="boost_locale-vc143" version="1.86.0" targetFramework="Native" />
   <package id="boost_program_options-vc143" version="1.86.0" targetFramework="Native" />
-  <package id="boost_system-vc143" version="1.86.0" targetFramework="Native" />
   <package id="boost_thread-vc143" version="1.86.0" targetFramework="Native" />
   <package id="secp256k1_vc143" version="0.1.0.21" targetFramework="Native" />
 </packages>

builds/msvc/vs2022/libbitcoin-system.import.props

@@ -50,6 +50,8 @@
       <!-- NOMINMAX enables use of std::min/max without conflict. -->
       <!-- WIN32_LEAN_AND_MEAN avoids inclusion of certain headers, winsock.h conflicts with boost and protocol use of winsock2.h. -->
       <PreprocessorDefinitions>WITH_ICU;WIN32_LEAN_AND_MEAN;NOMINMAX;_WIN32_WINNT=0x0600;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <!-- Disable auto-linking for all boost-json and its dependency boost-container so they can be header only. -->
+      <PreprocessorDefinitions>BOOST_JSON_NO_LIB;BOOST_CONTAINER_NO_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <PreprocessorDefinitions Condition="'$(Linkage-libbitcoin-system)' == 'static' Or '$(Linkage-libbitcoin-system)' == 'ltcg'">BC_STATIC;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <PreprocessorDefinitions Condition="$(Configuration.IndexOf('Debug')) != -1">_CRTDBG_MAP_ALLOC;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <!-- Enable use of CPU intrinsics. -->

configure.ac

@@ -213,28 +213,24 @@ AS_CASE([${CC}], [*],
 
 # Check dependencies.
 #==============================================================================
-# Require Boost of at least version 1.76.0 and output ${boost_CPPFLAGS/LDFLAGS}.
+# Require Boost of at least version 1.86.0 and output ${boost_CPPFLAGS/LDFLAGS}.
 #------------------------------------------------------------------------------
 AS_CASE([${CC}], [*],
-    [AX_BOOST_BASE([1.76.0],
+    [AX_BOOST_BASE([1.86.0],
         [AC_SUBST([boost_CPPFLAGS], [${BOOST_CPPFLAGS}])
          AC_SUBST([boost_ISYS_CPPFLAGS], [`echo ${BOOST_CPPFLAGS} | $SED s/^-I/-isystem/g | $SED s/' -I'/' -isystem'/g`])
          AC_SUBST([boost_LDFLAGS], [${BOOST_LDFLAGS}])
          AC_MSG_NOTICE([boost_CPPFLAGS : ${boost_CPPFLAGS}])
          AC_MSG_NOTICE([boost_ISYS_CPPFLAGS : ${boost_ISYS_CPPFLAGS}])
          AC_MSG_NOTICE([boost_LDFLAGS : ${boost_LDFLAGS}])],
-        [AC_MSG_ERROR([Boost 1.76.0 or later is required but was not found.])])])
+        [AC_MSG_ERROR([Boost 1.86.0 or later is required but was not found.])])])
 
 AS_CASE([${enable_isystem}],[yes],
     [AC_SUBST([boost_BUILD_CPPFLAGS], [${boost_ISYS_CPPFLAGS}])],
     [AC_SUBST([boost_BUILD_CPPFLAGS], [${boost_CPPFLAGS}])])
 
 AC_MSG_NOTICE([boost_BUILD_CPPFLAGS : ${boost_BUILD_CPPFLAGS}])
 
-AX_BOOST_REGEX
-AC_SUBST([boost_regex_LIBS], [${BOOST_REGEX_LIB}])
-AC_MSG_NOTICE([boost_regex_LIBS : ${boost_regex_LIBS}])
-
 AS_CASE([${with_tests}], [yes],
     [AX_BOOST_UNIT_TEST_FRAMEWORK
      AC_SUBST([boost_unit_test_framework_LIBS], [${BOOST_UNIT_TEST_FRAMEWORK_LIB}])

include/bitcoin/network/boost.hpp

@@ -21,29 +21,14 @@
 
 #include <bitcoin/network/version.hpp>
 
-// "By default, enable_current_exception and enable_error_info are integrated
-// directly in the throw_exception function. Defining BOOST_EXCEPTION_DISABLE
-// disables this integration."
-// www.boost.org/doc/libs/1_78_0/libs/exception/doc/configuration_macros.html
-// This does not prevent interfaces that are documented to throw from doing so.
-// It only prevents boost from internally wrapping the exception object with
-// another class (in boost/throw_exception.hpp). Nearly all instances of the
-// internal boost exceptions affecting this library occur in streambuf and are
-// caught and presumed discarded in std::istream (standards allow propagation).
-// See more comments in streamers.hpp on streams that may throw exceptions.
-// Must be set on the command line to ensure it is captured by all includes.
-////#define BOOST_EXCEPTION_DISABLE
-
 // Avoid namespace conflict between boost::placeholders and std::placeholders.
 // This arises when including <functional>, which declares std::placeholders.
 // www.boost.org/doc/libs/1_78_0/boost/bind.hpp
 #define BOOST_BIND_NO_PLACEHOLDERS
 
-// Include boost in cpp files only from here, so placeholders exclusion works.
-// Avoid use in header includes due to warning repetition (boost/format.hpp).
+// Include boost only from here, so placeholders exclusion works.
 #include <boost/asio.hpp>
 #include <boost/circular_buffer.hpp>
-#include <boost/regex.hpp>
 #include <boost/system/error_code.hpp>
 
 #endif