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https://github.com/boostorg/spirit.git
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47945d1e81
`rule` now resolves the parse function using concepts, providing
significantly faster compile time & better errors.
`core/error_handler_types.hpp`: New header to separate enum
definition.
`annotate_on_success`: Modernized.
`on_error` and `on_success` now only accepts const iterators.
This is a breaking change, but we should apply this immediately
due to the reasons described below.
Historically, Spirit has passed mutable lvalue references of the
*internal* iterators to the `on_success`/`on_error` handlers. This
behavior was semantically a mistake, because:
(1) `on_success`/`on_error` mechanism was designed to be
grammar-agnostic, and
(2) it does not make sense to modify the grammar-specific
iterator on the grammar-agnostic callback.
Furthermore, any modification to X3's internal iterator variables
may invoke undefined behavior, since we had never provided any
kind of guarantee on how those variables are processed in X3's
implementation details.
In other words, I consider the old behavior as a serious BUG
that involves undefined behavior which may even lead to
security issues.
`BOOST_SPIRIT_DECLARE`: Deprecated regarding compile-time slowness
of `BOOST_PP_SEQ_FOR_EACH`.
`BOOST_SPIRIT_DEFINE`: Ditto.
`BOOST_SPIRIT_INSTANTIATE`: Deprecated because the name was not
correctly prefixed with `X3_`.
`BOOST_SPIRIT_X3_DECLARE`: New macro with correctly prefixed name.
`BOOST_SPIRIT_X3_DEFINE`: Ditto.
`BOOST_SPIRIT_X3_INSTANTIATE`: Ditto.
132 lines
4.2 KiB
C++
132 lines
4.2 KiB
C++
/*=============================================================================
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Copyright (c) 2001-2014 Joel de Guzman
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Copyright (c) 2025 Nana Sakisaka
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#include "test.hpp"
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#include <boost/spirit/home/x3.hpp>
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#include <boost/fusion/include/std_pair.hpp>
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#include <boost/variant.hpp>
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#include <iostream>
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#include <string>
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using boost::spirit::x3::rule;
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rule<class direct_rule, int> direct_rule = "direct_rule";
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rule<class indirect_rule, int> indirect_rule = "indirect_rule";
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auto const direct_rule_def = boost::spirit::x3::int_;
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auto const indirect_rule_def = direct_rule;
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BOOST_SPIRIT_X3_DEFINE(direct_rule)
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BOOST_SPIRIT_X3_DEFINE(indirect_rule)
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int main()
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{
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using spirit_test::test;
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using spirit_test::test_attr;
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using namespace boost::spirit::x3::ascii;
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using boost::spirit::x3::raw;
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using boost::spirit::x3::eps;
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using boost::spirit::x3::lit;
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using boost::spirit::x3::_attr;
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using boost::spirit::x3::parse;
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using boost::spirit::x3::int_;
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using boost::spirit::x3::char_;
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BOOST_SPIRIT_ASSERT_CONSTEXPR_CTORS(raw['x']);
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{
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boost::iterator_range<char const*> range;
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std::string str;
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BOOST_TEST((test_attr("spirit_test_123", raw[alpha >> *(alnum | '_')], range)));
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BOOST_TEST((std::string(range.begin(), range.end()) == "spirit_test_123"));
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BOOST_TEST((test_attr(" spirit", raw[*alpha], range, space)));
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BOOST_TEST((range.size() == 6));
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}
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{
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std::string str;
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BOOST_TEST((test_attr("spirit_test_123", raw[alpha >> *(alnum | '_')], str)));
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BOOST_TEST((str == "spirit_test_123"));
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str.clear();
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BOOST_TEST((test_attr("x123", alpha >> raw[+alnum], str)))
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&& BOOST_TEST_EQ(str, "x123");
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}
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{
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boost::iterator_range<char const*> range;
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BOOST_TEST((test("x", raw[alpha])));
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BOOST_TEST((test_attr("x", raw[alpha], range)));
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BOOST_TEST((test_attr("x", raw[alpha] >> eps, range)));
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}
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{
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boost::iterator_range<char const*> range;
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BOOST_TEST((test("x", raw[alpha][ ([&](auto& ctx){ range = _attr(ctx); }) ])));
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BOOST_TEST(range.size() == 1 && *range.begin() == 'x');
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}
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{
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boost::iterator_range<char const*> range;
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BOOST_TEST((test("x123x", lit('x') >> raw[+digit] >> lit('x'))));
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BOOST_TEST((test_attr("x123x", lit('x') >> raw[+digit] >> lit('x'), range)));
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BOOST_TEST((std::string(range.begin(), range.end()) == "123"));
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}
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{
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using range = boost::iterator_range<std::string::iterator>;
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boost::variant<int, range> attr;
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std::string str("test");
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(void)parse(str.begin(), str.end(), (int_ | raw[*char_]), attr);
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auto rng = boost::get<range>(attr);
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BOOST_TEST(std::string(rng.begin(), rng.end()) == "test");
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}
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{
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std::vector<boost::iterator_range<std::string::iterator>> attr;
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std::string str("123abcd");
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(void)parse(str.begin(), str.end()
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, (raw[int_] >> raw[*char_])
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, attr
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);
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BOOST_TEST(attr.size() == 2);
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BOOST_TEST(std::string(attr[0].begin(), attr[0].end()) == "123");
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BOOST_TEST(std::string(attr[1].begin(), attr[1].end()) == "abcd");
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}
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{
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std::pair<int, boost::iterator_range<std::string::iterator>> attr;
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std::string str("123abcd");
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(void)parse(str.begin(), str.end()
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, (int_ >> raw[*char_])
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, attr
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);
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BOOST_TEST(attr.first == 123);
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BOOST_TEST(std::string(attr.second.begin(), attr.second.end()) == "abcd");
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}
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{
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// test with simple rule
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boost::iterator_range<char const*> range;
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BOOST_TEST((test_attr("123", raw[direct_rule], range)));
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BOOST_TEST((std::string(range.begin(), range.end()) == "123"));
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}
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{
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// test with complex rule
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boost::iterator_range<char const*> range;
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BOOST_TEST((test_attr("123", raw[indirect_rule], range)));
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BOOST_TEST((std::string(range.begin(), range.end()) == "123"));
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}
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return boost::report_errors();
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}
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