55 lines
1.4 KiB
C++
55 lines
1.4 KiB
C++
#ifndef EOLIAN_CXX_LIST_HH
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#define EOLIAN_CXX_LIST_HH
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#include "grammar/generator.hpp"
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namespace efl { namespace eolian { namespace grammar {
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template <typename G, typename S>
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struct list_generator
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{
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list_generator(G g, S s)
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: g(g), s(s) {}
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template <typename OutputIterator, typename Attribute, typename Context>
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bool generate(OutputIterator sink, Attribute const& attribute, Context const& context) const
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{
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auto generator = as_generator(g);
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auto separator = as_generator(s);
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bool first = true;
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for(auto&& c : attribute)
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{
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if(!first)
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if(!separator.generate(sink, attributes::unused, context)) return false;
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if(!generator.generate(sink, c, context))
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return false;
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first = false;
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}
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return true;
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}
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G g;
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S s;
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};
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template <typename G, typename S>
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struct is_eager_generator<list_generator<G, S> > : std::true_type {};
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template <typename G, typename S>
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struct is_generator<list_generator<G, S> > : std::true_type {};
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namespace type_traits {
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template <typename G, typename S>
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struct attributes_needed<list_generator<G, S> > : std::integral_constant<int, 1> {};
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}
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template <typename G, typename S>
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typename std::enable_if<grammar::is_generator<G>::value && grammar::is_generator<S>::value, list_generator<G, S>>::type
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operator%(G g, S s)
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{
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return list_generator<G, S>{g, s};
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}
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} } }
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#endif
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