Bug 74098 - [clover] adaptor.hpp:47:16: error: function cannot return function type 'std::vector<unsigned long, std::allocator<unsigned long> > (unsigned long, unsigned long)'
Summary: [clover] adaptor.hpp:47:16: error: function cannot return function type 'std:...
Status: RESOLVED NOTOURBUG
Alias: None
Product: Mesa
Classification: Unclassified
Component: Other (show other bugs)
Version: unspecified
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: mesa-dev
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Reported: 2014-01-27 00:52 UTC by Vinson Lee
Modified: 2014-01-28 17:54 UTC (History)
1 user (show)

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Attachments
clover_workaround_clang_function_argument_deduction.patch (948 bytes, patch)
2014-01-28 15:32 UTC, Francisco Jerez 		Details | Splinter Review
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Description Vinson Lee 2014-01-27 00:52:10 UTC 
mesa: 07149f0252c52b4ac58b6df4e307fd786b49b490 (master)

clang build error

  CXX      core/libclover_la-kernel.lo
In file included from core/kernel.cpp:23:
In file included from ./core/kernel.hpp:28:
In file included from ./core/object.hpp:33:
In file included from ./core/property.hpp:28:
In file included from ./util/range.hpp:29:
./util/adaptor.hpp:47:16: error: function cannot return function type 'std::vector<unsigned long, std::allocator<unsigned long> > (unsigned long, unsigned long)'
               F(typename std::iterator_traits<Is>::reference...)
               ^
Comment 1 Tom Stellard 2014-01-27 13:52:20 UTC 
Which version of clang were you using?
Comment 2 Vinson Lee 2014-01-27 18:56:51 UTC 
(In reply to comment #1)
> Which version of clang were you using?

$ clang++ --version
Ubuntu clang version 3.4-1ubuntu2 (tags/RELEASE_34/final) (based on LLVM 3.4)
Target: x86_64-pc-linux-gnu
Thread model: posix
Comment 3 Francisco Jerez 2014-01-28 15:32:41 UTC 
Created attachment 92932 [details] [review]
clover_workaround_clang_function_argument_deduction.patch

I suspect this is a clang bug.  In the function call to "map(F &&f, ...)" in "util/factor.hpp:115" it deduces the template argument "F" as a function type instead of an lvalue-reference to function type, as it should be because the provided argument is an lvalue.

Would you mind bringing this to the LLVM bug tracker?  For the meantime you can use the attached work-around to get it to build with clang.

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