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Refactored; added static assertions against the specification of a default implementation

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[SVN r16414]
This commit is contained in:
Dave Abrahams
2002-11-25 22:03:42 +00:00
parent 087e2d6e35
commit 7609a1c7c6
1 changed files with 52 additions and 60 deletions
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112
include/boost/python/def.hpp
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@@ -18,15 +18,25 @@ namespace boost { namespace python {
namespace detail
{
template <class Fn, class A1>
void
dispatch_def(
void const*,
char const* name,
Fn fn,
A1 const& a1)
namespace error
{
def_helper<A1> helper(a1);
// Compile-time error messages
template <bool> struct multiple_functions_passed_to_def;
template <> struct multiple_functions_passed_to_def<false> { typedef char type; };
}
//
// def_from_helper --
//
// Use a def_helper to define a regular wrapped function in the current scope.
template <class F, class Helper>
void def_from_helper(
char const* name, F const& fn, Helper const& helper)
{
// Must not try to use default implementations except with method definitions.
typedef typename error::multiple_functions_passed_to_def<
Helper::has_default_implementation
>::type assertion;
detail::scope_setattr_doc(
name, boost::python::make_function(
@@ -35,41 +45,37 @@ namespace detail
, helper.keywords())
, helper.doc()
);
}
}
template <class Fn, class A1, class A2>
void dispatch_def(
void const*,
char const* name,
Fn fn,
A1 const& a1,
A2 const& a2)
{
def_helper<A1,A2> helper(a1,a2);
//
// These two overloads discriminate between def() as applied to
// regular functions and def() as applied to the result of
// BOOST_PYTHON_FUNCTION_OVERLOADS(). The final argument is used to
// discriminate.
//
template <class Fn, class A1>
void
def_maybe_overloads(
char const* name
, Fn fn
, A1 const& a1
, ...)
{
detail::def_from_helper(name, fn, def_helper<A1>(a1));
}
detail::scope_setattr_doc(
name, python::make_function(
fn
, helper.policies()
, helper.keywords())
, helper.doc()
);
}
template <class StubsT, class SigT>
void dispatch_def(
detail::overloads_base const*,
char const* name,
SigT sig,
StubsT const& stubs)
{
// convert sig to a type_list (see detail::get_signature in signature.hpp)
// before calling detail::define_with_defaults.
scope current;
detail::define_with_defaults(
name, stubs, current, detail::get_signature(sig));
}
template <class StubsT, class SigT>
void def_maybe_overloads(
char const* name
, SigT sig
, StubsT const& stubs
, detail::overloads_base const*)
{
scope current;
detail::define_with_defaults(
name, stubs, current, detail::get_signature(sig));
}
}
template <class Fn>
@@ -81,33 +87,19 @@ void def(char const* name, Fn fn)
template <class Arg1T, class Arg2T>
void def(char const* name, Arg1T arg1, Arg2T const& arg2)
{
// The arguments may be:
// def(name, function)
// def(name, function, policy)
// def(name, function, doc_string)
// def(name, signature, stubs)
detail::dispatch_def(&arg2, name, arg1, arg2);
detail::def_maybe_overloads(name, arg1, arg2, &arg2);
}
template <class Arg1T, class Arg2T, class Arg3T>
void def(char const* name, Arg1T arg1, Arg2T const& arg2, Arg3T const& arg3)
template <class F, class A1, class A2>
void def(char const* name, F f, A1 const& a1, A2 const& a2)
{
detail::dispatch_def(&arg2, name, arg1, arg2, arg3);
detail::def_from_helper(name, f, detail::def_helper<A1,A2>(a1,a2));
}
template <class F, class A1, class A2, class A3>
void def(char const* name, F f, A1 const& a1, A2 const& a2, A3 const& a3)
{
detail::def_helper<A1,A2,A3> helper(a1,a2,a3);
detail::scope_setattr_doc(
name, python::make_function(
f
, helper.policies()
, helper.keywords())
, helper.doc()
);
detail::def_from_helper(name, f, detail::def_helper<A1,A2,A3>(a1,a2,a3));
}
}} // namespace boost::python