https://llvm.org/bugs/show_bug.cgi?id=30588
Bug ID: 30588
Summary: Clang-cl: Preprocessor concatenate strings failure
with colons
Product: clang
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: C++
Assignee: unassignedclangb...@nondot.org
Reporter: jva...@gmail.com
CC: dgre...@apple.com, llvm-bugs@lists.llvm.org
Classification: Unclassified
Created attachment 17393
--> https://llvm.org/bugs/attachment.cgi?id=17393&action=edit
Reproduction
While trying to compile our MSVC code base with clang-cl, we found a
preprocessor error in string-concatenations.
If we define our concatenate the following way: (See attachment for full
reproduction)
#define M(O,P) #O ## "::" ## #P
it cannot be called with M(A::B, C)
Instead it gives errors:
error: pasting formed '"A::B""::"', an invalid preprocessing token
[-Winvalid-token-paste]
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