使用boost::fusion::iterator_range的示例程序(C/C++)

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本文介绍了一个C/C++示例程序,展示了如何利用boost::fusion::iterator_range处理Fusion序列的子序列。首先,程序引入了boost::fusion的相关头文件,接着创建了一个包含int、float和std::string的Fusion向量。通过boost::fusion::make_iterator_range创建了从第二个到第三个元素的iterator_range,并用for循环遍历并打印这些元素。boost::fusion::iterator_range提供了一种高效访问和操作Fusion序列子集的方法。

使用boost::fusion::iterator_range的示例程序(C/C++)

#include <iostream>
#include <boost/fusion/include/iterator_range.hpp>
#include <boost/fusion/include/vector.hpp>
#include <boost/fusion/include/at.hpp>

int main() {
    // 创建一个Fusion向量
    boost::fusion::vector<int, float, std::string> fusionVector(42, 3.14, "Hello");

    // 创建一个iterator_range,指向Fusion向量的第二个和第三个元素
    auto range = boost::fusion::make_iterator_range(
        boost::fusion::next(boost::fusion::begin(fusionVector)),
        boost::fusion::end(fusionVector)
    );

    // 遍历iterator_range并打印元素值
    for (auto it = boost::fusion::begin(range); it != boost::fusion::end(range); ++it) {
        std::cout << *it << std::endl;
    }

    return 0;
}

在这个示例程序中,我

/work/pcl-cross-compile/src/boost$ ls /work/pcl-cross-compile/install/boost/include/ algorithm dynamic_bitset.hpp make_unique.hpp qvm throw_exception.hpp align enable_shared_from_this.hpp math qvm.hpp timer aligned_storage.hpp exception math_fwd.hpp qvm_lite.hpp timer.hpp align.hpp exception_ptr.hpp move random token_functions.hpp archive foreach_fwd.hpp mpi random.hpp token_iterator.hpp asio foreach.hpp mpi.hpp range tokenizer.hpp asio.hpp format mpl range.hpp tti assign format.hpp multi_array rational.hpp tuple assign.hpp functional multi_array.hpp redis type_erasure call_traits.hpp functional.hpp multi_index redis.hpp type_index cerrno.hpp fusion multi_index_container_fwd.hpp regex type_index.hpp charconv geometry multi_index_container.hpp regex_fwd.hpp typeof charconv.hpp geometry.hpp multiprecision regex.h type_traits circular_buffer gil nondet_random.hpp regex.hpp type_traits.hpp circular_buffer_fwd.hpp gil.hpp none.hpp safe_numerics units circular_buffer.hpp graph none_t.hpp scoped_array.hpp unordered cobalt heap nowide scoped_ptr.hpp unordered_map.hpp cobalt.hpp histogram numeric scope_exit.hpp unordered_set.hpp compressed_pair.hpp histogram.hpp operators.hpp serialization url concept hof operators_v1.hpp shared_array.hpp url.hpp concept_archetype.hpp hof.hpp optional shared_ptr.hpp utility concept_check icl optional.hpp signals2 utility.hpp concept_check.hpp interprocess parameter signals2.hpp uuid config intrusive pending smart_ptr uuid.hpp config.hpp intrusive_ptr.hpp phoenix smart_ptr.hpp variant container io phoenix.hpp sort variant2 context io_fwd.hpp pointer_cast.hpp spirit variant2.hpp convert json pointer_to_other.hpp spirit.hpp variant.hpp convert.hpp json.hpp polygon stacktrace version.hpp cregex.hpp leaf pool stacktrace.hpp vmd cstdfloat.hpp leaf.hpp predef statechart wave cstdint.hpp limits.hpp predef.h static_assert.hpp wave.hpp cxx11_char_types.hpp locale program_options static_string weak_ptr.hpp date_time locale.hpp program_options.hpp static_string.hpp winapi date_time.hpp local_function progress.hpp stl_interfaces xpressive describe local_function.hpp property_map system yap describe.hpp lockfree proto system.hpp detail logic ptr_container test dynamic_bitset make_default.hpp python thread dynamic_bitset_fwd.hpp make_shared.hpp python.hpp thread.hpp uidq8326@hzh27145u:/work/pcl-cross-compile/src/boost$ ./b2 install toolset=gcc architecture=arm address-model=64 \--prefix=/work/pcl-cross-compile/install/boost -j$(nproc) Performing configuration checks - default address-model : 64-bit [1] - default architecture : arm [1] - symlinks supported : yes error: Unable to find file or target named error: '/boost/headers' error: referred to from project at error: 'libs/date_time/build'
08-19
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