[PATCH] Remove redundant const qualifliers from string_view

[PATCH] Remove redundant const qualifliers from string_view

[Jonathan Wakely]

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These return types cause "type qualifiers ignored on function return
type" warnings with -Wsystem-headers.

	* include/experimental/string_view (basic_string_view::_S_compare):
	Remove redundant const from return type.
	* include/std/string_view (basic_string_view:_S_compare): Likewise.

Tested powerpc64le-linux, committed to trunk.


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commit 18f41619e2e59ccbd0653f39bc1c983c225fe561
Author: redi <redi@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Tue Oct 11 10:33:24 2016 +0000

    Remove redundant const qualifliers from string_view
    
    	* include/experimental/string_view (basic_string_view::_S_compare):
    	Remove redundant const from return type.
    	* include/std/string_view (basic_string_view:_S_compare): Likewise.
    
    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@240981 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/libstdc++-v3/include/experimental/string_view b/libstdc++-v3/include/experimental/string_view
index 8cb8c1f..c1dfef0 100644
--- a/libstdc++-v3/include/experimental/string_view
+++ b/libstdc++-v3/include/experimental/string_view
@@ -420,7 +420,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
     private:
 
-      static constexpr const int
+      static constexpr int
       _S_compare(size_type __n1, size_type __n2) noexcept
       {
 	return difference_type{__n1 - __n2} > std::numeric_limits<int>::max()
diff --git a/libstdc++-v3/include/std/string_view b/libstdc++-v3/include/std/string_view
index 14bfcd0..b2d2a29 100644
--- a/libstdc++-v3/include/std/string_view
+++ b/libstdc++-v3/include/std/string_view
@@ -414,7 +414,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       
     private:
 
-      static constexpr const int
+      static constexpr int
       _S_compare(size_type __n1, size_type __n2) noexcept
       {
 	return difference_type{__n1 - __n2} > std::numeric_limits<int>::max()