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| author | Jason Merrill <jason@redhat.com> | 2016-11-13 01:52:43 -0500 |
|---|---|---|
| committer | Jason Merrill <jason@gcc.gnu.org> | 2016-11-13 01:52:43 -0500 |
| commit | 559f2bbc362f311ab424232e72bb4f9f601b54eb (patch) | |
| tree | 56a3e898f32738bfb23ec8dbec54270080af2307 /gcc | |
| parent | dc8d2d00c52e29a4d68576cecdcc161484123195 (diff) | |
| download | gcc-559f2bbc362f311ab424232e72bb4f9f601b54eb.zip gcc-559f2bbc362f311ab424232e72bb4f9f601b54eb.tar.gz gcc-559f2bbc362f311ab424232e72bb4f9f601b54eb.tar.bz2 | |
CWG 2233 - default arg and parameter pack
* typeck.c (convert_arguments): Handle default arg followed by none.
From-SVN: r242350
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/cp/ChangeLog | 3 | ||||
| -rw-r--r-- | gcc/cp/typeck.c | 9 | ||||
| -rw-r--r-- | gcc/testsuite/g++.dg/cpp0x/variadic169.C | 9 |
3 files changed, 19 insertions, 2 deletions
diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog index b2195e4..8683744 100644 --- a/gcc/cp/ChangeLog +++ b/gcc/cp/ChangeLog @@ -1,5 +1,8 @@ 2016-11-12 Jason Merrill <jason@redhat.com> + CWG 2233 + * typeck.c (convert_arguments): Handle default arg followed by none. + * constexpr.c (potential_constant_expression_1): REALPART_EXPR and IMAGPART_EXPR can be lvalues. diff --git a/gcc/cp/typeck.c b/gcc/cp/typeck.c index 211696c..24ca1b5 100644 --- a/gcc/cp/typeck.c +++ b/gcc/cp/typeck.c @@ -3835,6 +3835,10 @@ convert_arguments (tree typelist, vec<tree, va_gc> **values, tree fndecl, { for (; typetail != void_list_node; ++i) { + /* After DR777, with explicit template args we can end up with a + default argument followed by no default argument. */ + if (!TREE_PURPOSE (typetail)) + break; tree parmval = convert_default_arg (TREE_VALUE (typetail), TREE_PURPOSE (typetail), @@ -3850,9 +3854,10 @@ convert_arguments (tree typelist, vec<tree, va_gc> **values, tree fndecl, break; } } - else + + if (typetail && typetail != void_list_node) { - if (complain & tf_error) + if (complain & tf_error) error_args_num (input_location, fndecl, /*too_many_p=*/false); return -1; } diff --git a/gcc/testsuite/g++.dg/cpp0x/variadic169.C b/gcc/testsuite/g++.dg/cpp0x/variadic169.C new file mode 100644 index 0000000..6858973 --- /dev/null +++ b/gcc/testsuite/g++.dg/cpp0x/variadic169.C @@ -0,0 +1,9 @@ +// DR 2233 +// { dg-do compile { target c++11 } } + +template<typename ...T> void f(int n = 0, T ...t); + +int main() +{ + f<int>(); // { dg-error "too few arguments" } +} |