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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - typo correction leads to bogus "use 'template' keyword" diagnostic"
href="https://llvm.org/bugs/show_bug.cgi?id=24422">24422</a>
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<tr>
<th>Summary</th>
<td>typo correction leads to bogus "use 'template' keyword" diagnostic
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>C++
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>richard-llvm@metafoo.co.uk
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org, rikka@google.com
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Testcase:
struct S { template<typename T> void Allocate(int); };
void f(S Filename) { SM.getAllocator().Allocate<char>(Filename.length() + 1); }
produces this:
<stdin>:1:77: error: use of undeclared identifier 'SM'
struct S { template<typename T> void Allocate(int); }; void f(S Filename) {
SM.getAllocator().Allocate<char>(Filename.length() + 1); }
^
<stdin>:1:95: error: no template named 'Allocate'; did you mean 'S::Allocate'?
struct S { template<typename T> void Allocate(int); }; void f(S Filename) {
SM.getAllocator().Allocate<char>(Filename.length() + 1); }
^~~~~~~~
S::Allocate
<stdin>:1:38: note: 'S::Allocate' declared here
struct S { template<typename T> void Allocate(int); }; void f(S Filename) {
SM.getAllocator().Allocate<char>(Filename.length() + 1); }
^
<stdin>:1:119: error: no member named 'length' in 'S'
struct S { template<typename T> void Allocate(int); }; void f(S Filename) {
SM.getAllocator().Allocate<char>(Filename.length() + 1); }
~~~~~~~~ ^
The second error here is bogus. We shouldn't have even tried that lookup, since
the LHS expression "SM.getAllocator()" resulted in an error. My original
testcase produced this even worse error:
/usr/local/google/home/richardsmith/build/llvm-9/src/tools/clang/lib/Serialization/ASTReader.cpp:1950:27:
error: use 'template' keyword to treat 'Allocate' as a dependent template name
SM.getAllocator().Allocate<char>(Filename.length() + 1);
^
template
/usr/local/google/home/richardsmith/build/llvm-9/src/tools/clang/lib/Serialization/ASTReader.cpp:1950:9:
error: use of undeclared identifier 'SM'
SM.getAllocator().Allocate<char>(Filename.length() + 1);
^
/usr/local/google/home/richardsmith/build/llvm-9/src/tools/clang/lib/Serialization/ASTReader.cpp:1950:51:
error: no member named 'length' in 'llvm::StringRef'
SM.getAllocator().Allocate<char>(Filename.length() + 1);
~~~~~~~~ ^
... but I'm not sure what other pieces are needed to reproduce that error.
(Here, Filename is a StringRef and SM is undeclared. The enclosing context is
*not* a template, so the "dependent template name" diagnostic is completely
wrong.)</pre>
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