call.c (convert_arg_to_ellipsis): Correct comment about passing by reference.

	* call.c (convert_arg_to_ellipsis): Correct comment about passing
	by reference.

From-SVN: r253410

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index cd0433c..0d20ea5 100644 (file)
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,8 @@
+2017-10-04  Nathan Sidwell  <nathan@acm.org>
+
+       * call.c (convert_arg_to_ellipsis): Correct comment about passing
+       by reference.
+
 2017-10-02  Richard Sandiford  <richard.sandiford@linaro.org>
 
        * constexpr.c (cxx_eval_store_expression): Use wi::to_widest

diff --git a/gcc/cp/call.c b/gcc/cp/call.c
index 05dc8bb..bfd9288 100644 (file)
--- a/gcc/cp/call.c
+++ b/gcc/cp/call.c
@@ -7178,8 +7178,9 @@ convert_arg_to_ellipsis (tree arg, tsubst_flags_t complain)
         with no corresponding parameter is conditionally-supported, with
         implementation-defined semantics.
 
-        We support it as pass-by-invisible-reference, just like a normal
-        value parameter.
+        We support it as pass-by-invisible-reference to the caller's
+        object.  That's different to named by-value parameters, which
+        construct a copy and pass a reference to that.
 
         If the call appears in the context of a sizeof expression,
         it is not potentially-evaluated.  */