Merge commit '1a57d96edd156958b12782e8c8b6a374142a7248'

2 files changed, 137 insertions, 0 deletions

diff --git a/nixpkgs/pkgs/development/libraries/range-v3/default.nix b/nixpkgs/pkgs/development/libraries/range-v3/default.nix
index a583239b52e0..3799ccbb59c6 100644
--- a/nixpkgs/pkgs/development/libraries/range-v3/default.nix
+++ b/nixpkgs/pkgs/development/libraries/range-v3/default.nix
@@ -11,6 +11,10 @@ stdenv.mkDerivation rec {
     sha256 = "18230bg4rq9pmm5f8f65j444jpq56rld4fhmpham8q3vr1c1bdjh";
   };
 
+  patches = [
+    ./gcc10.patch
+  ];
+
   nativeBuildInputs = [ cmake ];
 
   # Building the tests currently fails on AArch64 due to internal compiler
diff --git a/nixpkgs/pkgs/development/libraries/range-v3/gcc10.patch b/nixpkgs/pkgs/development/libraries/range-v3/gcc10.patch
new file mode 100644
index 000000000000..caebf0a63162
--- /dev/null
+++ b/nixpkgs/pkgs/development/libraries/range-v3/gcc10.patch
@@ -0,0 +1,133 @@
+From a91f0e1be27a31c446452a753001d4518ef83a6b Mon Sep 17 00:00:00 2001
+From: Eric Niebler <eniebler@boost.org>
+Date: Mon, 17 Aug 2020 17:48:09 -0700
+Subject: [PATCH] work around premature instantiation problem on gcc; fixes
+ #1545
+
+---
+ include/range/v3/view/chunk.hpp |  6 +++---
+ include/range/v3/view/split.hpp | 26 +++++++++++++-------------
+ 2 files changed, 16 insertions(+), 16 deletions(-)
+
+diff --git a/include/range/v3/view/chunk.hpp b/include/range/v3/view/chunk.hpp
+index 0c03cf1eb..b8df13303 100644
+--- a/include/range/v3/view/chunk.hpp
++++ b/include/range/v3/view/chunk.hpp
+@@ -313,8 +313,8 @@ namespace ranges
+ 
+             public:
+                 inner_view() = default;
+-                constexpr explicit inner_view(chunk_view_ & view) noexcept
+-                  : rng_{&view}
++                constexpr explicit inner_view(chunk_view_ * view) noexcept
++                  : rng_{view}
+                 {}
+                 CPP_auto_member
+                 constexpr auto CPP_fun(size)()(
+@@ -338,7 +338,7 @@ namespace ranges
+             constexpr inner_view read() const
+             {
+                 RANGES_EXPECT(!done());
+-                return inner_view{*rng_};
++                return inner_view{rng_};
+             }
+             constexpr bool done() const
+             {
+diff --git a/include/range/v3/view/split.hpp b/include/range/v3/view/split.hpp
+index facf1b37f..496220e4a 100644
+--- a/include/range/v3/view/split.hpp
++++ b/include/range/v3/view/split.hpp
+@@ -389,19 +389,19 @@ namespace ranges
+             split_outer_iterator() = default;
+ 
+             CPP_member
+-            constexpr explicit CPP_ctor(split_outer_iterator)(Parent & parent)(
++            constexpr explicit CPP_ctor(split_outer_iterator)(Parent * parent)(
+                 /// \pre
+                 requires (!forward_range<Base>))
+-              : parent_(&parent)
++              : parent_(parent)
+             {}
+ 
+             CPP_member
+-            constexpr CPP_ctor(split_outer_iterator)(Parent & parent,
++            constexpr CPP_ctor(split_outer_iterator)(Parent * parent,
+                                                      iterator_t<Base> current)(
+                 /// \pre
+                 requires forward_range<Base>)
+               : Current{std::move(current)}
+-              , parent_(&parent)
++              , parent_(parent)
+             {}
+ 
+             template(bool Other)(
+@@ -519,7 +519,7 @@ namespace ranges
+                                               ranges::equal_to> &&
+         (forward_range<V> || detail::tiny_range<Pattern>)
+ #endif
+-            struct RANGES_EMPTY_BASES split_view
++    struct RANGES_EMPTY_BASES split_view
+       : view_interface<split_view<V, Pattern>, is_finite<V>::value ? finite : unknown>
+       , private detail::split_view_base<iterator_t<V>>
+     {
+@@ -537,17 +537,17 @@ namespace ranges
+ #if RANGES_CXX_IF_CONSTEXPR < RANGES_CXX_IF_CONSTEXPR_17
+         outer_iterator<simple_view<V>()> begin_(std::true_type)
+         {
+-            return outer_iterator<simple_view<V>()>{*this, ranges::begin(base_)};
++            return outer_iterator<simple_view<V>()>{this, ranges::begin(base_)};
+         }
+         outer_iterator<false> begin_(std::false_type)
+         {
+             this->curr_ = ranges::begin(base_);
+-            return outer_iterator<false>{*this};
++            return outer_iterator<false>{this};
+         }
+ 
+         outer_iterator<simple_view<V>()> end_(std::true_type) const
+         {
+-            return outer_iterator<true>{*this, ranges::end(base_)};
++            return outer_iterator<true>{this, ranges::end(base_)};
+         }
+         default_sentinel_t end_(std::false_type) const
+         {
+@@ -580,11 +580,11 @@ namespace ranges
+         {
+ #if RANGES_CXX_IF_CONSTEXPR >= RANGES_CXX_IF_CONSTEXPR_17
+             if constexpr(forward_range<V>)
+-                return outer_iterator<simple_view<V>()>{*this, ranges::begin(base_)};
++                return outer_iterator<simple_view<V>()>{this, ranges::begin(base_)};
+             else
+             {
+                 this->curr_ = ranges::begin(base_);
+-                return outer_iterator<false>{*this};
++                return outer_iterator<false>{this};
+             }
+ #else
+             return begin_(meta::bool_<forward_range<V>>{});
+@@ -596,7 +596,7 @@ namespace ranges
+                 /// \pre
+                 requires forward_range<V> && forward_range<const V>)
+         {
+-            return {*this, ranges::begin(base_)};
++            return {this, ranges::begin(base_)};
+         }
+         CPP_member
+         constexpr auto end() //
+@@ -604,14 +604,14 @@ namespace ranges
+                 /// \pre
+                 requires forward_range<V> && common_range<V>)
+         {
+-            return outer_iterator<simple_view<V>()>{*this, ranges::end(base_)};
++            return outer_iterator<simple_view<V>()>{this, ranges::end(base_)};
+         }
+         constexpr auto end() const
+         {
+ #if RANGES_CXX_IF_CONSTEXPR >= RANGES_CXX_IF_CONSTEXPR_17
+             if constexpr(forward_range<V> && forward_range<const V> &&
+                          common_range<const V>)
+-                return outer_iterator<true>{*this, ranges::end(base_)};
++                return outer_iterator<true>{this, ranges::end(base_)};
+             else
+                 return default_sentinel;
+ #else