http://llvm.org/bugs/show_bug.cgi?id=15539
Bug ID: 15539
Summary: __has_include seems to be broken under #ifdef
Product: clang
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: C++
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
#if FOO
#elif __has_include(<foo>)
#endif
compiles without error, however
#ifdef FOO
#elif __has_include(<foo>)
#endif
produces:
typeinfo.cpp:2:7: error: __has_include must be used within a preprocessing
directive
#elif __has_include(<foo>)
^
typeinfo.cpp:2:7: error: invalid token at start of a preprocessor expression
<scratch space>:2:1: note: expanded from here
0
^
2 errors generated.
(discovered in a change to libc++, r177297)
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