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PR c++/80935 - wrong C++17 error with lambda 

* decl.c (check_for_uninitialized_const_var): Check
	is_instantiation_of_constexpr.

From-SVN: r252943
This commit is contained in:
Jason Merrill 2017-09-18 14:36:59 -04:00 committed by Jason Merrill
parent 3ef1cd3d1e
commit 5de2272480
3 changed files with 23 additions and 3 deletions
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4
gcc/cp/ChangeLog
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@ -1,5 +1,9 @@
2017-09-18 Jason Merrill <jason@redhat.com>
PR c++/80935 - wrong C++17 error with lambda
* decl.c (check_for_uninitialized_const_var): Check
is_instantiation_of_constexpr.
PR c++/81671 - nullptr_t template parameter
* pt.c (convert_nontype_argument): Fix nullptr_t check.

7
gcc/cp/decl.c
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@ -5579,9 +5579,10 @@ check_for_uninitialized_const_var (tree decl)
"uninitialized const %qD", decl);
else
{
error_at (DECL_SOURCE_LOCATION (decl),
"uninitialized variable %qD in %<constexpr%> function",
decl);
if (!is_instantiation_of_constexpr (current_function_decl))
error_at (DECL_SOURCE_LOCATION (decl),
"uninitialized variable %qD in %<constexpr%> function",
decl);
cp_function_chain->invalid_constexpr = true;
}

15
gcc/testsuite/g++.dg/cpp1z/constexpr-lambda16.C Normal file
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@ -0,0 +1,15 @@
// PR c++/80642
// { dg-do compile { target c++14 } }
int main()
{
[](auto i)
{
if (i)
{
int j;
return i + j;
}
return i;
}(0);
}