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X3: Warn about future C++17 requirement

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I plan to keep the warning for two releases before starting to utilize C++17 features.

Since Boost 1.81 (scheduled to November 2022) supported compilers will be:
* Clang 4 (currently 3.6)
* GCC 7 (currently 5)
* VS 2017 (currently 2015)
This commit is contained in:
Nikita Kniazev
2022-01-06 02:23:31 +03:00
parent 166e71ae36
commit 9168be80dd
6 changed files with 54 additions and 2 deletions
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1
.appveyor.yml
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@@ -35,6 +35,7 @@ init:
- set B2_ARGS=link=shared threading=multi variant=release
address-model=%ADDRMDL% toolset=%TOOLSET%
define=BOOST_ALL_NO_LIB
define=BOOST_SPIRIT_X3_HIDE_CXX17_WARNING
before_build:
- set PATH=%BOOST_ROOT%;C:\Python36-x64\Scripts;%PATH%

2
.github/workflows/ci.yml vendored
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@@ -437,6 +437,6 @@ jobs:
echo '==================================> SCRIPT'
b2 link=shared threading=multi variant=release,sanitize toolset=$TRAVIS_COMPILER cxxstd=$STD $STDLIB warnings=extra warnings-as-errors=on
b2 link=shared threading=multi variant=release,sanitize toolset=$TRAVIS_COMPILER cxxstd=$STD $STDLIB warnings=extra warnings-as-errors=on define=BOOST_SPIRIT_X3_HIDE_CXX17_WARNING
fi

1
.travis.yml
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@@ -152,3 +152,4 @@ script:
- b2 link=shared threading=multi variant=release,sanitize
toolset=$TRAVIS_COMPILER cxxstd=$STD $STDLIB
warnings=extra warnings-as-errors=on
define=BOOST_SPIRIT_X3_HIDE_CXX17_WARNING

9
README.md
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@@ -14,7 +14,14 @@ executable.
The newest Spirit shines faster compile times. Currently only a parser framework.
Requires C++14 compiler (GCC 5, Clang 3.6, VS 2015 Update 3).
*WARNING*: C++14 compilers support will be dropped soon.
Spirit X3 in Boost 1.81 (scheduled to November 2022) will use C++17 features.
Supported compilers will be:
* Clang 4 (currently 3.6)
* GCC 7 (currently 5)
* VS 2017 v15.8 (currently 2015 U3)
### Spirit V2 (2nd generation)

9
doc/x3/spirit_x3.qbk
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@@ -208,6 +208,15 @@
This is the documentation of the newest version of __spirit__ (currently,
__version__).
*WARNING*: C++14 compilers support will be dropped soon.
Spirit X3 in Boost 1.81 (scheduled to November 2022) will use C++17 features.
Supported compilers will be:
* Clang 4 (currently 3.6)
* GCC 7 (currently 5)
* VS 2017 v15.8 (currently 2015 U3)
[include preface.qbk]
[include introduction.qbk]
[include include.qbk]s

34
include/boost/spirit/home/x3.hpp
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@@ -11,6 +11,40 @@
#pragma once
#endif
#if !defined BOOST_SPIRIT_X3_HIDE_CXX17_WARNING && !( true \
&& defined __cpp_if_constexpr && __cpp_if_constexpr >= 201606 \
&& defined __cpp_inline_variables && __cpp_inline_variables >= 201606 \
&& defined __cpp_fold_expressions && __cpp_fold_expressions >= 201603 \
&& defined __cpp_variadic_using && __cpp_variadic_using >= 201611 \
&& (defined __cpp_template_auto && __cpp_template_auto >= 201606 \
|| defined __cpp_nontype_template_parameter_auto && __cpp_nontype_template_parameter_auto >= 201606) \
&& defined __cpp_nontype_template_args && __cpp_nontype_template_args >= 201411 \
)
# define BOOST_SPIRIT_X3_STRINGIZE_IMPL(x) #x
# define BOOST_SPIRIT_X3_STRINGIZE(x) BOOST_SPIRIT_X3_STRINGIZE_IMPL(x)
# if defined __GNUC__ || defined __clang__
# warning "Spirit X3 will soon use C++17 features which your compiler does not support"
# warning "Minimal supported compiler versions: Clang 4 / GCC 7 / MSC 1915 (VS 2017 v15.8)"
# if defined __clang__
# pragma message "This compiler seems to be Clang " BOOST_SPIRIT_X3_STRINGIZE(__clang_major__)
# else
# pragma message "This compiler seems to be GCC " BOOST_SPIRIT_X3_STRINGIZE(__GNUC__)
# endif
# warning "Define BOOST_SPIRIT_X3_HIDE_CXX17_WARNING to hide the warning"
# elif defined _MSC_VER
# pragma message (__FILE__ "(" BOOST_SPIRIT_X3_STRINGIZE(__LINE__) "): warning: Spirit X3 will soon use C++17 features which your compiler does not support" )
# pragma message (__FILE__ "(" BOOST_SPIRIT_X3_STRINGIZE(__LINE__) "): warning: Minimal supported compiler versions: Clang 4 / GCC 7 / MSC 1915 (VS 2017 v15.8)" )
# pragma message (__FILE__ "(" BOOST_SPIRIT_X3_STRINGIZE(__LINE__) "): warning: This compiler seems to be MSC " BOOST_SPIRIT_X3_STRINGIZE(_MSC_VER) )
# pragma message (__FILE__ "(" BOOST_SPIRIT_X3_STRINGIZE(__LINE__) "): warning: Define BOOST_SPIRIT_X3_HIDE_CXX17_WARNING to hide the warning" )
# else
# pragma message "warning: Spirit X3 will soon use C++17 features which your compiler does not support"
# pragma message "warning: Minimal supported compiler versions: Clang 4 / GCC 7 / MSC 1915 (VS 2017 v15.8)"
# pragma message "warning: Define BOOST_SPIRIT_X3_HIDE_CXX17_WARNING to hide the warning"
# endif
# undef BOOST_SPIRIT_X3_STRINGIZE
# undef BOOST_SPIRIT_X3_STRINGIZE_IMPL
#endif
#include <boost/spirit/home/x3/auxiliary.hpp>
#include <boost/spirit/home/x3/char.hpp>
#include <boost/spirit/home/x3/directive.hpp>