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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [Codeview] Omitted class member function declaration for lambda."
href="https://bugs.llvm.org/show_bug.cgi?id=46361">46361</a>
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<th>Summary</th>
<td>[Codeview] Omitted class member function declaration for lambda.
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</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>All
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>DebugInfo
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>international.phantom@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>jdevlieghere@apple.com, keith.walker@arm.com, llvm-bugs@lists.llvm.org, paul_robinson@playstation.sony.com
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<pre>Given the following test case:
//------------------------------------------------------------
int test() {
auto myLambdaFunction = [&](auto Param) {
return Param;
};
return myLambdaFunction(1);
}
//------------------------------------------------------------
Using the command line to generate debug info CodeView:
clang -c -g -O0 lambda.cpp -o lambda-cv.o -gcodeview --target=x86_64-windows
The output generated by llvm-pdbutil, shows the definition for a member
function (operator ()), but it does not include its declaration in the class
associated with the lambda:
0 | S_GPROC32_ID `test`
0 | S_LOCAL `myLambdaFunction`
type=0x1005 (test::<unnamed-tag>)
0 | S_PROC_ID_END
** Class associated with lambda **
----------------------------------
0x1005 | LF_CLASS [size = 76] `test::<unnamed-tag>`
unique name: `.?AV<lambda_0>@?0??test@@YAHXZ@`
field list: 0x1004
0x1004 | LF_FIELDLIST <--- Empty field list
** operator() definition **
---------------------------
0 | S_LPROC32_ID `test::<unnamed-tag>::operator()<int>`
type = `0x100C (operator())`
0 | S_LOCAL `this`
type=0x100D (const test::<unnamed-tag>*), flags = param
0 | S_LOCAL [size = 16] `Param`
type=0x0074 (int), flags = param
0 | S_PROC_ID_END
0x100C | LF_MFUNC_ID
name = operator(), type = 0x100B, class type = 0x1003
0x100B | LF_MFUNCTION
return type = <no type>, # args = 1, param list = 0x100A
class type = 0x1003, this type = 0x1009
0x100A | LF_ARGLIST
0x0074 (int): `int`
0x1003 | LF_CLASS `test::<unnamed-tag>`
options: forward ref
Using MSVC on the same test, the output looks like:
0 | S_GPROC32_ID `test`
type = `0x1015 (test)`
original type = 0x100F
0 | S_BPREL32 `myLambdaFunction`
type = 0x100F
0 | S_PROC_ID_END
0x100F | LF_CLASS `test::__l2::<lambda_5684e4bda96652f15ead82ba8f8a98f2>`
unique name:
`.?AV<lambda_5684e4bda96652f15ead82ba8f8a98f2>@@`28ae9b9a`
field list: 0x100E
0x100E | LF_FIELDLIST
- LF_METHOD .....
- LF_ONEMETHOD ....</pre>
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