Charles Li
1a88adbb27
Lit C++11 Compatibility Patch #8
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24 tests have been updated for C++11 compatibility.
llvm-svn: 266387
2016-04-14 23:47:07 +00:00
Aaron Ballman
409af50858
Volatile reads are side-effecting operations, but in the general case of access through a volatile-qualified type, we're not certain of the underlying object's side-effects on access.
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Treat volatile accesses as "maybe" instead of "definite" side effects for the purposes of warning on evaluations in an unevaluated context. No longer diagnose on idiomatic code like:
int * volatile v;
(void)sizeof(*v);
llvm-svn: 225116
2015-01-03 17:00:12 +00:00
Aaron Ballman
6c93b3e29c
Adding a -Wunused-value warning for expressions with side effects used in an unevaluated expression context, such as sizeof(), or decltype(). Also adds a similar warning when the expression passed to typeid() *is* evaluated, since it is equally likely that the user would expect the expression operand to be unevaluated in that case.
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llvm-svn: 224465
2014-12-17 21:57:17 +00:00
Benjamin Kramer
35e6fee3e9
Sema: Reject templates in all extern "C" contexts.
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Otherwise we'd accept them if the LinkageDecl was not the direct
parent DeclContext. PR17968.
llvm-svn: 200641
2014-02-02 16:35:43 +00:00
Lubos Lunak
1f490f3aea
report unused-value warning also for warn_unused types
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llvm-svn: 186793
2013-07-21 13:15:58 +00:00
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>.
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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
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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.
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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
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voids in sub-expressions. Patch by Mike M!
Fixes PR4806.
llvm-svn: 98335
2010-03-12 07:11:26 +00:00