https://bugs.llvm.org/show_bug.cgi?id=49017
Bug ID: 49017
Summary: preprocessor fails to resolve directives in
keepComments mode
Product: clang
Version: 11.0
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: Frontend
Assignee: unassignedclangb...@nondot.org
Reporter: jqua...@web.de
CC: llvm-bugs@lists.llvm.org, neeil...@live.com,
richard-l...@metafoo.co.uk
When running clang preprocessor with -C option (keep comments), preprocessor
directives that come after a comment are not resolved.
Example:
/* xxx */ #define X 1
int z=X;
clang -E -C keeps the entire code as it is, while clang -E correctly produces:
int z=1;
I would expect the following result:
/* xxx */
int z=1;
As far as I could debug this issue, it seems that pp. directives are only
recognized when the # is the first token on a line. Comments are not considered
for this (first token) criterion - a comment is a token in -C mode - but should
be ignored.
The same behavior occurs in clang 10 and 11.
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