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| author | Richard Smith <richard-llvm@metafoo.co.uk> | 2014-08-11 23:30:23 +0000 |
|---|---|---|
| committer | Richard Smith <richard-llvm@metafoo.co.uk> | 2014-08-11 23:30:23 +0000 |
| commit | 444d8c4517ce4f74b52d64cf168bf1b7850ec7f7 (patch) | |
| tree | b6718fe27ee8dc632826ca9e10fa17a6d19f0d2f /lib/Sema/SemaTemplateVariadic.cpp | |
| parent | 2f361f76db11d874da12a2f8c2dedf0e81f62fe2 (diff) | |
Reject varargs '...' in function prototype if there are more parameters after
it. Diagnose with recovery if it appears after a function parameter that was
obviously supposed to be a parameter pack. Otherwise, warn if it immediately
follows a function parameter pack, because the user most likely didn't intend
to write a parameter pack followed by a C-style varargs ellipsis.
This warning can be syntactically disabled by using ", ..." instead of "...".
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@215408 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Sema/SemaTemplateVariadic.cpp')
| -rw-r--r-- | lib/Sema/SemaTemplateVariadic.cpp | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/lib/Sema/SemaTemplateVariadic.cpp b/lib/Sema/SemaTemplateVariadic.cpp index 8e4ce0d9da..6e317d573b 100644 --- a/lib/Sema/SemaTemplateVariadic.cpp +++ b/lib/Sema/SemaTemplateVariadic.cpp @@ -197,6 +197,20 @@ namespace { }; } +/// \brief Determine whether it's possible for an unexpanded parameter pack to +/// be valid in this location. This only happens when we're in a declaration +/// that is nested within an expression that could be expanded, such as a +/// lambda-expression within a function call. +/// +/// This is conservatively correct, but may claim that some unexpanded packs are +/// permitted when they are not. +bool Sema::isUnexpandedParameterPackPermitted() { + for (auto *SI : FunctionScopes) + if (isa<sema::LambdaScopeInfo>(SI)) + return true; + return false; +} + /// \brief Diagnose all of the unexpanded parameter packs in the given /// vector. bool |