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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - The partial comment produced by deleting splice is accepted by Clang"
href="https://bugs.llvm.org/show_bug.cgi?id=51844">51844</a>
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<th>Summary</th>
<td>The partial comment produced by deleting splice is accepted by Clang
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>trunk
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>enhancement
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>C++2a
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>xmh970252187@gmail.com
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<th>CC</th>
<td>blitzrakete@gmail.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<p>
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<pre>Given the source file:
````
int main(){
}
//\
````
According to [lex.phases] p2
<span class="quote">> Each sequence of a backslash character (\) immediately followed by zero or more whitespace characters other than new-line followed by a new-line character is deleted, splicing physical source lines to form logical source lines.</span >
That means the source file will end with `/`, after the above phase. "//"
starts a comment and the comment is terminated by a new-line as per
[lex.comment] p1
<span class="quote">> The characters // start a comment, which terminates immediately before the next new-line character. </span >
According to [lex.phases] p3
<span class="quote">> A source file shall not end in a partial preprocessing token or in a partial comment.</span >
Since there is no new-line to terminate the comment, hence it is a partial
comment and the source file ends with that partial comment, the program should
be ill-formed.</pre>
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