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Workaround for GCC bug 61321

This commit is contained in:
Gunnar Beutner 2017-12-19 08:42:24 +01:00
parent 10a188d395
commit 02dc3a9507
4 changed files with 91 additions and 69 deletions
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97
lib/base/functionwrapper.hpp
View File

@ -23,6 +23,9 @@
#include "base/i2-base.hpp"
#include "base/value.hpp"
#include <vector>
#include <boost/function_types/function_type.hpp>
#include <boost/function_types/parameter_types.hpp>
#include <boost/function_types/result_type.hpp>
#include <boost/function_types/function_arity.hpp>
#include <type_traits>
@ -31,7 +34,14 @@ using namespace std::placeholders;
namespace icinga
{
inline std::function<Value (const std::vector<Value>&)> WrapFunction(const std::function<Value(const std::vector<Value>&)>& function)
template<typename FuncType>
typename std::enable_if<
std::is_class<FuncType>::value &&
std::is_same<typename boost::function_types::result_type<decltype(&FuncType::operator())>::type, Value>::value &&
std::is_same<typename boost::mpl::at_c<boost::function_types::parameter_types<decltype(&FuncType::operator())>, 1>::type, const std::vector<Value>&>::value &&
boost::function_types::function_arity<decltype(&FuncType::operator())>::value == 2,
std::function<Value (const std::vector<Value>&)>>::type
WrapFunction(FuncType function)
{
return function;
}
@ -43,12 +53,11 @@ inline std::function<Value (const std::vector<Value>&)> WrapFunction(void (*func
return Empty;
};
}
template<typename Return>
std::function<Value (const std::vector<Value>&)> WrapFunction(Return (*function)(const std::vector<Value>&))
{
return [function](const std::vector<Value>& arguments) {
return static_cast<Value>(function(arguments));
};
return std::bind(function, _1);
}
template <std::size_t... Indices>
@ -69,52 +78,51 @@ struct build_indices<0> {
template <std::size_t N>
using BuildIndices = typename build_indices<N>::type;
struct unpack_caller
struct UnpackCaller
{
private:
template <typename FuncType, size_t... I>
auto call(FuncType f, const std::vector<Value>& args, indices<I...>) -> decltype(f(args[I]...))
auto Invoke(FuncType f, const std::vector<Value>& args, indices<I...>) -> decltype(f(args[I]...))
{
return f(args[I]...);
}
public:
template <typename FuncType>
template <typename FuncType, int Arity>
auto operator() (FuncType f, const std::vector<Value>& args)
-> decltype(call(f, args, BuildIndices<boost::function_types::function_arity<typename boost::remove_pointer<FuncType>::type>::value>{}))
-> decltype(Invoke(f, args, BuildIndices<Arity>{}))
{
return call(f, args, BuildIndices<boost::function_types::function_arity<typename boost::remove_pointer<FuncType>::type>::value>{});
return Invoke(f, args, BuildIndices<Arity>{});
}
};
enum class enabler_t {};
template<bool T>
using EnableIf = typename std::enable_if<T, enabler_t>::type;
template<typename FuncType>
std::function<Value (const std::vector<Value>&)> WrapFunction(FuncType function,
EnableIf<std::is_same<decltype(unpack_caller()(FuncType(), std::vector<Value>())), void>::value>* = 0)
template<typename FuncType, int Arity, typename ReturnType>
struct FunctionWrapper
{
return [function](const std::vector<Value>& arguments) {
constexpr int arity = boost::function_types::function_arity<typename boost::remove_pointer<FuncType>::type>::value;
static Value Invoke(FuncType function, const std::vector<Value>& arguments)
{
return UnpackCaller().operator()<FuncType, Arity>(function, arguments);
}
};
if (arguments.size() < arity)
BOOST_THROW_EXCEPTION(std::invalid_argument("Too few arguments for function."));
else if (arguments.size() > arity)
BOOST_THROW_EXCEPTION(std::invalid_argument("Too many arguments for function."));
unpack_caller()(function, arguments);
template<typename FuncType, int Arity>
struct FunctionWrapper<FuncType, Arity, void>
{
static Value Invoke(FuncType function, const std::vector<Value>& arguments)
{
UnpackCaller().operator()<FuncType, Arity>(function, arguments);
return Empty;
};
}
};
template<typename FuncType>
std::function<Value (const std::vector<Value>&)> WrapFunction(FuncType function,
EnableIf<!std::is_same<decltype(unpack_caller()(FuncType(), std::vector<Value>())), void>::value>* = 0)
typename std::enable_if<
std::is_function<typename std::remove_pointer<FuncType>::type>::value && !std::is_same<FuncType, Value(*)(const std::vector<Value>&)>::value,
std::function<Value (const std::vector<Value>&)>>::type
WrapFunction(FuncType function)
{
return [function](const std::vector<Value>& arguments) {
constexpr int arity = boost::function_types::function_arity<typename boost::remove_pointer<FuncType>::type>::value;
constexpr size_t arity = boost::function_types::function_arity<typename std::remove_pointer<FuncType>::type>::value;
if (arity > 0) {
if (arguments.size() < arity)
@ -123,7 +131,36 @@ std::function<Value (const std::vector<Value>&)> WrapFunction(FuncType function,
BOOST_THROW_EXCEPTION(std::invalid_argument("Too many arguments for function."));
}
return unpack_caller()(function, arguments);
using ReturnType = decltype(UnpackCaller().operator()<FuncType, arity>(*static_cast<FuncType *>(nullptr), std::vector<Value>()));
return FunctionWrapper<FuncType, arity, ReturnType>::Invoke(function, arguments);
};
}
template<typename FuncType>
typename std::enable_if<
std::is_class<FuncType>::value &&
!(std::is_same<typename boost::function_types::result_type<decltype(&FuncType::operator())>::type, Value>::value &&
std::is_same<typename boost::mpl::at_c<boost::function_types::parameter_types<decltype(&FuncType::operator())>, 1>::type, const std::vector<Value>&>::value &&
boost::function_types::function_arity<decltype(&FuncType::operator())>::value == 2),
std::function<Value (const std::vector<Value>&)>>::type
WrapFunction(FuncType function)
{
using FuncTypeInvoker = decltype(&FuncType::operator());
return [function](const std::vector<Value>& arguments) {
constexpr size_t arity = boost::function_types::function_arity<FuncTypeInvoker>::value - 1;
if (arity > 0) {
if (arguments.size() < arity)
BOOST_THROW_EXCEPTION(std::invalid_argument("Too few arguments for function."));
else if (arguments.size() > arity)
BOOST_THROW_EXCEPTION(std::invalid_argument("Too many arguments for function."));
}
using ReturnType = decltype(UnpackCaller().operator()<FuncType, arity>(*static_cast<FuncType *>(nullptr), std::vector<Value>()));
return FunctionWrapper<FuncType, arity, ReturnType>::Invoke(function, arguments);
};
}

2
lib/config/vmops.hpp
View File

@ -113,7 +113,7 @@ public:
{
auto evaluatedClosedVars = EvaluateClosedVars(frame, closedVars);
auto wrapper = [argNames, evaluatedClosedVars, expression](const std::vector<Value>& arguments) {
auto wrapper = [argNames, evaluatedClosedVars, expression](const std::vector<Value>& arguments) -> Value {
if (arguments.size() < argNames.size())
BOOST_THROW_EXCEPTION(std::invalid_argument("Too few arguments for function"));

51
lib/icinga/macroprocessor.cpp
View File

@ -180,30 +180,6 @@ bool MacroProcessor::ResolveMacro(const String& macro, const ResolverList& resol
return false;
}
Value MacroProcessor::InternalResolveMacrosShim(const std::vector<Value>& args, const ResolverList& resolvers,
const CheckResult::Ptr& cr, const MacroProcessor::EscapeCallback& escapeFn, const Dictionary::Ptr& resolvedMacros,
bool useResolvedMacros, int recursionLevel)
{
if (args.size() < 1)
BOOST_THROW_EXCEPTION(std::invalid_argument("Too few arguments for function"));
String missingMacro;
return MacroProcessor::InternalResolveMacros(args[0], resolvers, cr, &missingMacro, escapeFn,
resolvedMacros, useResolvedMacros, recursionLevel);
}
Value MacroProcessor::InternalResolveArgumentsShim(const std::vector<Value>& args, const ResolverList& resolvers,
const CheckResult::Ptr& cr, const Dictionary::Ptr& resolvedMacros,
bool useResolvedMacros, int recursionLevel)
{
if (args.size() < 2)
BOOST_THROW_EXCEPTION(std::invalid_argument("Too few arguments for function"));
return MacroProcessor::ResolveArguments(args[0], args[1], resolvers, cr,
resolvedMacros, useResolvedMacros, recursionLevel);
}
Value MacroProcessor::EvaluateFunction(const Function::Ptr& func, const ResolverList& resolvers,
const CheckResult::Ptr& cr, const MacroProcessor::EscapeCallback& escapeFn,
const Dictionary::Ptr& resolvedMacros, bool useResolvedMacros, int recursionLevel)
@ -214,12 +190,27 @@ Value MacroProcessor::EvaluateFunction(const Function::Ptr& func, const Resolver
resolvers_this->Set(resolver.first, resolver.second);
}
resolvers_this->Set("macro", new Function("macro (temporary)", std::bind(&MacroProcessor::InternalResolveMacrosShim,
_1, std::cref(resolvers), cr, MacroProcessor::EscapeCallback(), resolvedMacros, useResolvedMacros,
recursionLevel + 1), { "str" }));
resolvers_this->Set("resolve_arguments", new Function("resolve_arguments (temporary)", std::bind(&MacroProcessor::InternalResolveArgumentsShim,
_1, std::cref(resolvers), cr, resolvedMacros, useResolvedMacros,
recursionLevel + 1)));
auto internalResolveMacrosShim = [resolvers, cr, resolvedMacros, useResolvedMacros, recursionLevel](const std::vector<Value>& args) {
if (args.size() < 1)
BOOST_THROW_EXCEPTION(std::invalid_argument("Too few arguments for function"));
String missingMacro;
return MacroProcessor::InternalResolveMacros(args[0], resolvers, cr, &missingMacro, MacroProcessor::EscapeCallback(),
resolvedMacros, useResolvedMacros, recursionLevel);
};
resolvers_this->Set("macro", new Function("macro (temporary)", internalResolveMacrosShim, { "str" }));
auto internalResolveArgumentsShim = [resolvers, cr, resolvedMacros, useResolvedMacros, recursionLevel](const std::vector<Value>& args) {
if (args.size() < 2)
BOOST_THROW_EXCEPTION(std::invalid_argument("Too few arguments for function"));
return MacroProcessor::ResolveArguments(args[0], args[1], resolvers, cr,
resolvedMacros, useResolvedMacros, recursionLevel + 1);
};
resolvers_this->Set("resolve_arguments", new Function("resolve_arguments (temporary)", internalResolveArgumentsShim, { "command", "args" }));
return func->InvokeThis(resolvers_this);
}

6
lib/icinga/macroprocessor.hpp
View File

@ -63,12 +63,6 @@ private:
String *missingMacro, const EscapeCallback& escapeFn,
const Dictionary::Ptr& resolvedMacros, bool useResolvedMacros,
int recursionLevel = 0);
static Value InternalResolveMacrosShim(const std::vector<Value>& args, const ResolverList& resolvers,
const CheckResult::Ptr& cr, const MacroProcessor::EscapeCallback& escapeFn,
const Dictionary::Ptr& resolvedMacros, bool useResolvedMacros, int recursionLevel);
static Value InternalResolveArgumentsShim(const std::vector<Value>& args, const ResolverList& resolvers,
const CheckResult::Ptr& cr, const Dictionary::Ptr& resolvedMacros,
bool useResolvedMacros, int recursionLevel);
static Value EvaluateFunction(const Function::Ptr& func, const ResolverList& resolvers,
const CheckResult::Ptr& cr, const MacroProcessor::EscapeCallback& escapeFn,
const Dictionary::Ptr& resolvedMacros, bool useResolvedMacros, int recursionLevel);