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Add test for NEED_CPP_DERIVED_TEMPLATE_OPERATORS.

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git-svn-id: svn://10.0.0.236/trunk@69763 18797224-902f-48f8-a5cc-f745e15eee43
This commit is contained in:
waterson%netscape.com 2000-05-15 07:18:54 +00:00
parent a4e9dab641
commit ebc5da3a0a
1 changed files with 21 additions and 0 deletions
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21
mozilla/configure.in
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@ -2428,6 +2428,27 @@ if test "$ac_cv_cpp_partial_specialization" = yes ; then
fi
dnl Some compilers have limited support for operators with templates;
dnl specifically, it is necessary to define derived operators when a base
dnl class's operator declaration should suffice.
AC_CACHE_CHECK(whether operators must be re-defined for templates derived from templates,
ac_cv_need_derived_template_operators,
[AC_TRY_COMPILE([template <class T> class Base { };
template <class T>
Base<T> operator+(const Base<T>& lhs, const Base<T>& rhs) { return lhs; }
template <class T> class Derived : public Base<T> { };],
[Derived<char> a, b;
Base<char> c = a + b;
return 0;],
ac_cv_need_derived_template_operators=no,
ac_cv_need_derived_template_operators=yes)])
if test "$ac_cv_need_derived_template_operators" = yes ; then
AC_DEFINE(NEED_CPP_DERIVED_TEMPLATE_OPERATORS)
fi
dnl
dnl We dont do exceptions on unix. The only reason this used to be here
dnl is that mozilla/xpcom/tests/TestCOMPtr.cpp has a test which uses