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| author | Eric Fiselier <eric@efcs.ca> | 2017-01-13 22:02:08 +0000 |
|---|---|---|
| committer | Eric Fiselier <eric@efcs.ca> | 2017-01-13 22:02:08 +0000 |
| commit | ebaf7dab14c3bf1c4f995d9ad1199b6c2784a8ca (patch) | |
| tree | f65c289da0bd7205d5042d29be1efd31a85b20d8 /docs | |
| parent | ccb58d0a2c539a5cec75a30f09243fd3064939a6 (diff) | |
Add _LIBCPP_DIAGNOSE_WARNING and _LIBCPP_DIAGNOSE_ERROR macros.
Clang recently added a `diagnose_if(cond, msg, type)` attribute
which can be used to generate diagnostics when `cond` is a constant
expression that evaluates to true. Otherwise no attribute has no
effect.
This patch adds _LIBCPP_DIAGNOSE_ERROR/WARNING macros which
use this new attribute. Additionally this patch implements
a diagnostic message when a non-const-callable comparator is
given to a container.
Note: For now the warning version of the diagnostic is useless
within libc++ since warning diagnostics are suppressed by the
system header pragma. I'm going to work on fixing this.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291961 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/UsingLibcxx.rst | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/docs/UsingLibcxx.rst b/docs/UsingLibcxx.rst index de87c9c15..6d910ca6f 100644 --- a/docs/UsingLibcxx.rst +++ b/docs/UsingLibcxx.rst @@ -173,3 +173,10 @@ thread safety annotations. return Tup{"hello world", 42}; // explicit constructor called. OK. } +**_LIBCPP_DISABLE_ADDITIONAL_DIAGNOSTICS**: + This macro disables the additional diagnostics generated by libc++ using the + `diagnose_if` attribute. These additional diagnostics include checks for: + + * Giving `set`, `map`, `multiset`, `multimap` a comparator which is not + const callable. + |