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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - preprocessor fails to resolve directives in keepComments mode"
href="https://bugs.llvm.org/show_bug.cgi?id=49017">49017</a>
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<th>Summary</th>
<td>preprocessor fails to resolve directives in keepComments mode
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>11.0
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>Windows NT
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Frontend
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>jquante@web.de
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<pre>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.</pre>
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