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author | Zancanaro; Carlo <czan8762@plang3.cs.usyd.edu.au> | 2012-09-24 09:58:17 +1000 |
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committer | Zancanaro; Carlo <czan8762@plang3.cs.usyd.edu.au> | 2012-09-24 09:58:17 +1000 |
commit | 222e2a7620e6520ffaf4fc4e69d79c18da31542e (patch) | |
tree | 7bfbc05bfa3b41c8f9d2e56d53a0bc3e310df239 /clang/test/SemaCXX/warn-self-assign.cpp | |
parent | 3d206f03985b50beacae843d880bccdc91a9f424 (diff) |
Add the clang library to the repo (with some of my changes, too).
Diffstat (limited to 'clang/test/SemaCXX/warn-self-assign.cpp')
-rw-r--r-- | clang/test/SemaCXX/warn-self-assign.cpp | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/clang/test/SemaCXX/warn-self-assign.cpp b/clang/test/SemaCXX/warn-self-assign.cpp new file mode 100644 index 0000000..fcdb2ab --- /dev/null +++ b/clang/test/SemaCXX/warn-self-assign.cpp @@ -0,0 +1,47 @@ +// RUN: %clang_cc1 -fsyntax-only -Wself-assign -verify %s + +void f() { + int a = 42, b = 42; + a = a; // expected-warning{{explicitly assigning}} + b = b; // expected-warning{{explicitly assigning}} + a = b; + b = a = b; + a = a = a; // expected-warning{{explicitly assigning}} + a = b = b = a; +} + +// Dummy type. +struct S {}; + +void false_positives() { +#define OP = +#define LHS a +#define RHS a + int a = 42; + // These shouldn't warn due to the use of the preprocessor. + a OP a; + LHS = a; + a = RHS; + LHS OP RHS; +#undef OP +#undef LHS +#undef RHS + + S s; + s = s; // Not a builtin assignment operator, no warning. + + // Volatile stores aren't side-effect free. + volatile int vol_a; + vol_a = vol_a; + volatile int &vol_a_ref = vol_a; + vol_a_ref = vol_a_ref; +} + +template <typename T> void g() { + T a; + a = a; // May or may not be a builtin assignment operator, no warning. +} +void instantiate() { + g<int>(); + g<S>(); +} |