http://llvm.org/bugs/show_bug.cgi?id=20312
Bug ID: 20312
Summary: wrong tokenization around invalid UCNs
Product: clang
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
Consider:
#define X(a) y##a
#define yx Q(
#define Q(x)
X(x\u200e))
This code is ill-formed: it contains the identifier token 'x\u200e' which
contains the UCN '\u200e' which is not permitted in an identifier.
Clang treats this as two tokens instead, and as a result accepts the above
ill-formed code. This similar case is correctly rejected:
X(x\u0065))
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