[PATCH 3/4] c++: better silencing of warnings

[Theophile Ranquet]

* tests/c++.at (C++ GLR parser identifier shadowing): Don't name unused
arguments, this is legal in C++.
---
 tests/c++.at | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/tests/c++.at b/tests/c++.at
index ad08b8a..0bebe8a 100644
--- a/tests/c++.at
+++ b/tests/c++.at
@@ -781,14 +781,15 @@ exp: ZERO
 
 int yylex (yy::parser::semantic_type *yylval)
 {
-  (void) *yylval;
+  // Note: this argument is unused, but named on purpose.  There used to be a
+  // bug with a macro that erroneously expanded this identifier to
+  // yystackp->yyval.
+  YYUSE (yylval);
   return yy::parser::token::ZERO;
 }
 
-void yy::parser::error (std::string const& msg)
-{
-  (void) msg;
-}
+void yy::parser::error (std::string const&)
+{}
 
 int main()
 {}
-- 
1.8.1.1