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author | Carlo Zancanaro <carlo@pc-4w14-0.cs.usyd.edu.au> | 2012-10-15 17:10:06 +1100 |
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committer | Carlo Zancanaro <carlo@pc-4w14-0.cs.usyd.edu.au> | 2012-10-15 17:10:06 +1100 |
commit | be1de4be954c80875ad4108e0a33e8e131b2f2c0 (patch) | |
tree | 1fbbecf276bf7c7bdcbb4dd446099d6d90eaa516 /clang/test/SemaCXX/warn-unused-value.cpp | |
parent | c4626a62754862d20b41e8a46a3574264ea80e6d (diff) | |
parent | f1bd2e48c5324d3f7cda4090c87f8a5b6f463ce2 (diff) |
Merge branch 'master' of ssh://bitbucket.org/czan/honours
Diffstat (limited to 'clang/test/SemaCXX/warn-unused-value.cpp')
-rw-r--r-- | clang/test/SemaCXX/warn-unused-value.cpp | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/clang/test/SemaCXX/warn-unused-value.cpp b/clang/test/SemaCXX/warn-unused-value.cpp new file mode 100644 index 0000000..1c0263c --- /dev/null +++ b/clang/test/SemaCXX/warn-unused-value.cpp @@ -0,0 +1,51 @@ +// RUN: %clang_cc1 -fsyntax-only -verify -Wunused-value %s + +// PR4806 +namespace test0 { + class Box { + public: + int i; + volatile int j; + }; + + void doit() { + // pointer to volatile has side effect (thus no warning) + Box* box = new Box; + box->i; // expected-warning {{expression result unused}} + box->j; + } +} + +namespace test1 { +struct Foo { + int i; + bool operator==(const Foo& rhs) { + return i == rhs.i; + } +}; + +#define NOP(x) (x) +void b(Foo f1, Foo f2) { + NOP(f1 == f2); // expected-warning {{expression result unused}} +} +#undef NOP +} + +namespace test2 { + extern "C" { + namespace std { + template<typename T> struct basic_string { + struct X {}; + void method() const { + X* x; + &x[0]; // expected-warning {{expression result unused}} + } + }; + typedef basic_string<char> string; + void func(const std::string& str) { + str.method(); // expected-note {{in instantiation of member function}} + } + } + } +} + |