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https://github.com/matrix-construct/construct
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ircd::json: Printer operator template type conveyance; minor cleanup.
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parent
04595054d8
commit
60b0a5eab3
1 changed files with 53 additions and 36 deletions
89
ircd/json.cc
89
ircd/json.cc
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@ -360,10 +360,17 @@ struct ircd::json::printer
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{
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template<class gen,
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class... attr>
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bool operator()(mutable_buffer &out, gen&&, attr&&...) const;
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bool operator()(std::nothrow_t, mutable_buffer &out, gen&&, attr&&...) const;
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template<class gen>
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bool operator()(mutable_buffer &out, gen&&) const;
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bool operator()(std::nothrow_t, mutable_buffer &out, gen&&) const;
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template<class gen,
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class... attr>
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void operator()(mutable_buffer &out, gen&&, attr&&...) const;
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template<class gen>
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void operator()(mutable_buffer &out, gen&&) const;
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template<class it_a,
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class it_b,
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@ -374,24 +381,14 @@ const ircd::json::printer;
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template<class gen,
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class... attr>
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bool
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inline void
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__attribute__((always_inline))
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ircd::json::printer::operator()(mutable_buffer &out,
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gen&& g,
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attr&&... a)
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const
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{
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const auto maxwidth
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{
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karma::maxwidth(size(out))
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};
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const auto gg
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{
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maxwidth[std::forward<gen>(g)]
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};
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const auto throws{[&out]
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{
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if(unlikely(!operator()(std::nothrow, out, std::forward<gen>(g), std::forward<attr>(a)...)))
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throw print_panic
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{
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"Failed to print attributes '%s' generator '%s' (%zd bytes in buffer)",
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@ -399,44 +396,63 @@ const
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demangle<decltype(g)>(),
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size(out)
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};
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}};
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return karma::generate(begin(out), gg | eps[throws], std::forward<attr>(a)...);
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}
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template<class gen>
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bool
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inline void
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__attribute__((always_inline))
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ircd::json::printer::operator()(mutable_buffer &out,
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gen&& g)
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const
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{
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const auto maxwidth
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{
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karma::maxwidth(size(out))
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};
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const auto gg
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{
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maxwidth[std::forward<gen>(g)]
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};
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const auto throws{[&out]
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{
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if(unlikely(!operator()(std::nothrow, out, std::forward<gen>(g))))
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throw print_panic
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{
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"Failed to print generator '%s' (%zd bytes in buffer)",
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demangle<decltype(g)>(),
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size(out)
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};
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}};
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}
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return karma::generate(begin(out), gg | eps[throws]);
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template<class gen,
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class... attr>
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inline bool
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__attribute__((always_inline))
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ircd::json::printer::operator()(std::nothrow_t,
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mutable_buffer &out,
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gen&& g,
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attr&&... a)
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const
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{
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const auto generator
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{
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karma::maxwidth(size(out))[std::forward<gen>(g)]
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};
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return karma::generate(begin(out), generator, std::forward<attr>(a)...);
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}
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template<class gen>
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inline bool
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__attribute__((always_inline))
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ircd::json::printer::operator()(std::nothrow_t,
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mutable_buffer &out,
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gen&& g)
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const
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{
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const auto generator
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{
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karma::maxwidth(size(out))[std::forward<gen>(g)]
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};
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return karma::generate(begin(out), generator);
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}
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template<class it_a,
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class it_b,
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class closure>
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void
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inline void
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__attribute__((always_inline))
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ircd::json::printer::list_protocol(mutable_buffer &buffer,
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it_a it,
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const it_b &end,
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@ -447,7 +463,8 @@ ircd::json::printer::list_protocol(mutable_buffer &buffer,
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lambda(buffer, *it);
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for(++it; it != end; ++it)
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{
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json::printer(buffer, json::printer.value_sep);
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static const auto &printer(json::printer);
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printer(buffer, printer.value_sep);
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lambda(buffer, *it);
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}
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}
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@ -1534,7 +1551,7 @@ ircd::json::stack::member::member(object &po,
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};
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mutable_buffer buf{tmp};
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if(!printer(buf, rule, name))
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if(!printer(std::nothrow, buf, rule, name))
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throw error
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{
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"member name overflow: max size is under %zu", sizeof(tmp)
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