llvm-project

Author	SHA1	Message	Date
Eli Friedman	c11535c248	Add a warning to diagnose statements in C++ like "(volatile int)x;". Conceptually, this is part of -Wunused-value, but I added a separate flag -Wunused-volatile-lvalue so it doesn't get turned off by accident with -Wno-unused-value. I also made a few minor improvements to existing unused value warnings in the process. <rdar://problem/11516811>. llvm-svn: 157362	2012-05-24 00:47:05 +00:00
Nick Lewycky	fcd5e7a160	When emitting a diagnostic about two-phase name lookup, don't do useless qualified name lookups into transparent contexts. llvm-svn: 152739	2012-03-14 20:41:00 +00:00
Matt Beaumont-Gay	dcaacaa190	Fix a QoI bug with overloaded operators inside macros. We were failing to set source locations and ranges in isUnusedResultAWarning for CXXOperatorCallExprs, leading to an "expression result unused" warning with absolutely no context if the expression was inside a macro. llvm-svn: 140036	2011-09-19 18:51:20 +00:00
John McCall	c493a73240	Improve the unused-value check to look into comma expressions and filter out voids in sub-expressions. Patch by Mike M! Fixes PR4806. llvm-svn: 98335	2010-03-12 07:11:26 +00:00