From e5fdbcc9da3855f5301f62d2d7ba39ad039ce7d4 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Tue, 21 Nov 2017 14:20:37 -0500
Subject: IWYU: Add more mappings for std::__decay_and_strip

IWYU incorrectly classifies this internal STL type as not internal, and
suggests including `<type_traits>` for it.  Work around the problem by
mapping the offending names to a file that we always include.

See include-what-you-use issue 434.
---
 Utilities/IWYU/mapping.imp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Utilities/IWYU/mapping.imp b/Utilities/IWYU/mapping.imp
index 3240edf..6477d59 100644
--- a/Utilities/IWYU/mapping.imp
+++ b/Utilities/IWYU/mapping.imp
@@ -52,11 +52,13 @@
   # __decay_and_strip is used internally in the C++11 standard library.
   # IWYU does not classify it as internal and suggests to add <type_traits>.
   # To ignore it, we simply map it to a file that is included anyway.
+  # Use '-Xiwyu -v7' to see the fully qualified names that need this.
   # TODO: Can this be simplified with an @-expression?
   #{ symbol: [ "@std::__decay_and_strip<.*>::__type", private, "\"cmConfigure.h\"", public ] },
   { symbol: [ "std::__decay_and_strip<cmCommand *&>::__type", private, "\"cmConfigure.h\"", public ] },
   { symbol: [ "std::__decay_and_strip<cmGeneratorTarget *&>::__type", private, "\"cmConfigure.h\"", public ] },
   { symbol: [ "std::__decay_and_strip<cmFindCommon::PathLabel &>::__type", private, "\"cmConfigure.h\"", public ] },
+  { symbol: [ "std::__decay_and_strip<cmSearchPath>::__type", private, "\"cmConfigure.h\"", public ] },
   { symbol: [ "std::__decay_and_strip<std::basic_string<char> &>::__type", private, "\"cmConfigure.h\"", public ] },
   { symbol: [ "std::__decay_and_strip<const std::basic_string<char> &>::__type", private, "\"cmConfigure.h\"", public ] },
   { symbol: [ "std::__decay_and_strip<cmFindPackageCommand::PathLabel &>::__type", private, "\"cmConfigure.h\"", public ] },
-- 
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