chore(3p/immer): Remove vendored copy of immer r/2029

We ended up dropping the use of this library again.

Change-Id: I2c44cd22a6128d23f87a582402bf5fb84991d608
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2292
Tested-by: BuildkiteCI
Reviewed-by: Profpatsch <mail@profpatsch.de>

22 files changed, 0 insertions, 712 deletions

diff --git a/third_party/immer/benchmark/set/access.hpp b/third_party/immer/benchmark/set/access.hpp
deleted file mode 100644
index 8605c0ff453c..000000000000
--- a/third_party/immer/benchmark/set/access.hpp
+++ /dev/null
@@ -1,175 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#pragma once
-
-#include "benchmark/config.hpp"
-
-#include <immer/set.hpp>
-#include <hash_trie.hpp> // Phil Nash
-#include <boost/container/flat_set.hpp>
-#include <set>
-#include <unordered_set>
-
-namespace {
-
-template <typename T=unsigned>
-auto make_generator_ranged(std::size_t runs)
-{
-    assert(runs > 0);
-    auto engine = std::default_random_engine{13};
-    auto dist = std::uniform_int_distribution<T>{0, (T)runs-1};
-    auto r = std::vector<T>(runs);
-    std::generate_n(r.begin(), runs, std::bind(dist, engine));
-    return r;
-}
-
-template <typename Generator, typename Set>
-auto benchmark_access_std()
-{
-    return [] (nonius::chronometer meter)
-    {
-        auto n  = meter.param<N>();
-        auto g1 = Generator{}(n);
-        auto g2 = make_generator_ranged(n);
-
-        auto v = Set{};
-        for (auto i = 0u; i < n; ++i)
-            v.insert(g1[i]);
-
-        measure(meter, [&] {
-            auto c = 0u;
-            for (auto i = 0u; i < n; ++i)
-                c += v.count(g1[g2[i]]);
-            volatile auto r = c;
-            return r;
-        });
-    };
-}
-
-template <typename Generator, typename Set>
-auto benchmark_access_hamt()
-{
-    return [] (nonius::chronometer meter)
-    {
-        auto n = meter.param<N>();
-        auto g1 = Generator{}(n);
-        auto g2 = make_generator_ranged(n);
-
-        auto v = Set{};
-        for (auto i = 0u; i < n; ++i)
-            v.insert(g1[i]);
-
-        measure(meter, [&] {
-            auto c = 0u;
-            for (auto i = 0u; i < n; ++i) {
-                auto& x = g1[g2[i]];
-                auto leaf = v.find(x).leaf();
-                c += !!(leaf && leaf->find(x));
-            }
-            volatile auto r = c;
-            return r;
-        });
-    };
-}
-
-
-template <typename Generator, typename Set>
-auto benchmark_access()
-{
-    return [] (nonius::chronometer meter)
-    {
-        auto n = meter.param<N>();
-        auto g1 = Generator{}(n);
-        auto g2 = make_generator_ranged(n);
-
-        auto v = Set{};
-        for (auto i = 0u; i < n; ++i)
-            v = v.insert(g1[i]);
-
-        measure(meter, [&] {
-            auto c = 0u;
-            for (auto i = 0u; i < n; ++i)
-                c += v.count(g1[g2[i]]);
-            volatile auto r = c;
-            return r;
-        });
-    };
-}
-
-template <typename Generator, typename Set>
-auto benchmark_bad_access_std()
-{
-    return [] (nonius::chronometer meter)
-    {
-        auto n = meter.param<N>();
-        auto g1 = Generator{}(n*2);
-
-        auto v = Set{};
-        for (auto i = 0u; i < n; ++i)
-            v.insert(g1[i]);
-
-        measure(meter, [&] {
-            auto c = 0u;
-            for (auto i = 0u; i < n; ++i)
-                c += v.count(g1[n+i]);
-            volatile auto r = c;
-            return r;
-        });
-    };
-}
-
-template <typename Generator, typename Set>
-auto benchmark_bad_access_hamt()
-{
-    return [] (nonius::chronometer meter)
-    {
-        auto n = meter.param<N>();
-        auto g1 = Generator{}(n*2);
-
-        auto v = Set{};
-        for (auto i = 0u; i < n; ++i)
-            v.insert(g1[i]);
-
-        measure(meter, [&] {
-            auto c = 0u;
-            for (auto i = 0u; i < n; ++i) {
-                auto& x = g1[n+i];
-                auto leaf = v.find(x).leaf();
-                c += !!(leaf && leaf->find(x));
-            }
-            volatile auto r = c;
-            return r;
-        });
-    };
-}
-
-
-template <typename Generator, typename Set>
-auto benchmark_bad_access()
-{
-    return [] (nonius::chronometer meter)
-    {
-        auto n = meter.param<N>();
-        auto g1 = Generator{}(n*2);
-
-        auto v = Set{};
-        for (auto i = 0u; i < n; ++i)
-            v = v.insert(g1[i]);
-
-        measure(meter, [&] {
-            auto c = 0u;
-            for (auto i = 0u; i < n; ++i)
-                c += v.count(g1[n+i]);
-            volatile auto r = c;
-            return r;
-        });
-    };
-}
-
-} // namespace
diff --git a/third_party/immer/benchmark/set/access.ipp b/third_party/immer/benchmark/set/access.ipp
deleted file mode 100644
index f026d9cfa736..000000000000
--- a/third_party/immer/benchmark/set/access.ipp
+++ /dev/null
@@ -1,30 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#include "access.hpp"
-
-#ifndef GENERATOR_T
-#error "you must define a GENERATOR_T"
-#endif
-
-using generator__ = GENERATOR_T;
-using t__ = typename decltype(generator__{}(0))::value_type;
-
-NONIUS_BENCHMARK("std::set", benchmark_access_std<generator__, std::set<t__>>())
-NONIUS_BENCHMARK("std::unordered_set", benchmark_access_std<generator__, std::unordered_set<t__>>())
-NONIUS_BENCHMARK("boost::flat_set", benchmark_access_std<generator__, boost::container::flat_set<t__>>())
-NONIUS_BENCHMARK("hamt::hash_trie", benchmark_access_hamt<generator__, hamt::hash_trie<t__>>())
-NONIUS_BENCHMARK("immer::set/5B", benchmark_access<generator__, immer::set<t__, std::hash<t__>,std::equal_to<t__>,def_memory,5>>())
-NONIUS_BENCHMARK("immer::set/4B", benchmark_access<generator__, immer::set<t__, std::hash<t__>,std::equal_to<t__>,def_memory,4>>())
-
-NONIUS_BENCHMARK("bad/std::set", benchmark_bad_access_std<generator__, std::set<t__>>())
-NONIUS_BENCHMARK("bad/std::unordered_set", benchmark_bad_access_std<generator__, std::unordered_set<t__>>())
-NONIUS_BENCHMARK("bad/boost::flat_set", benchmark_bad_access_std<generator__, boost::container::flat_set<t__>>())
-NONIUS_BENCHMARK("bad/hamt::hash_trie", benchmark_bad_access_hamt<generator__, hamt::hash_trie<t__>>())
-NONIUS_BENCHMARK("bad/immer::set/5B", benchmark_bad_access<generator__, immer::set<t__, std::hash<t__>,std::equal_to<t__>,def_memory,5>>())
-NONIUS_BENCHMARK("bad/immer::set/4B", benchmark_bad_access<generator__, immer::set<t__, std::hash<t__>,std::equal_to<t__>,def_memory,4>>())
diff --git a/third_party/immer/benchmark/set/insert.hpp b/third_party/immer/benchmark/set/insert.hpp
deleted file mode 100644
index be679b4de342..000000000000
--- a/third_party/immer/benchmark/set/insert.hpp
+++ /dev/null
@@ -1,55 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#pragma once
-
-#include "benchmark/config.hpp"
-
-#include <immer/set.hpp>
-#include <hash_trie.hpp> // Phil Nash
-#include <boost/container/flat_set.hpp>
-#include <set>
-#include <unordered_set>
-
-namespace {
-
-template <typename Generator, typename Set>
-auto benchmark_insert_mut_std()
-{
-    return [] (nonius::chronometer meter)
-    {
-        auto n = meter.param<N>();
-        auto g = Generator{}(n);
-
-        measure(meter, [&] {
-            auto v = Set{};
-            for (auto i = 0u; i < n; ++i)
-                v.insert(g[i]);
-            return v;
-        });
-    };
-}
-
-template <typename Generator, typename Set>
-auto benchmark_insert()
-{
-    return [] (nonius::chronometer meter)
-    {
-        auto n = meter.param<N>();
-        auto g = Generator{}(n);
-
-        measure(meter, [&] {
-            auto v = Set{};
-            for (auto i = 0u; i < n; ++i)
-                v = v.insert(g[i]);
-            return v;
-        });
-    };
-}
-
-} // namespace
diff --git a/third_party/immer/benchmark/set/insert.ipp b/third_party/immer/benchmark/set/insert.ipp
deleted file mode 100644
index 6717ccd57ea7..000000000000
--- a/third_party/immer/benchmark/set/insert.ipp
+++ /dev/null
@@ -1,28 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#include "insert.hpp"
-
-#ifndef GENERATOR_T
-#error "you must define a GENERATOR_T"
-#endif
-
-using generator__ = GENERATOR_T;
-using t__ = typename decltype(generator__{}(0))::value_type;
-
-NONIUS_BENCHMARK("std::set", benchmark_insert_mut_std<generator__, std::set<t__>>())
-NONIUS_BENCHMARK("std::unordered_set", benchmark_insert_mut_std<generator__, std::unordered_set<t__>>())
-NONIUS_BENCHMARK("boost::flat_set", benchmark_insert_mut_std<generator__, boost::container::flat_set<t__>>())
-NONIUS_BENCHMARK("hamt::hash_trie", benchmark_insert_mut_std<generator__, hamt::hash_trie<t__>>())
-
-NONIUS_BENCHMARK("immer::set/5B", benchmark_insert<generator__, immer::set<t__, std::hash<t__>,std::equal_to<t__>,def_memory,5>>())
-NONIUS_BENCHMARK("immer::set/4B", benchmark_insert<generator__, immer::set<t__, std::hash<t__>,std::equal_to<t__>,def_memory,4>>())
-#ifndef DISABLE_GC_BENCHMARKS
-NONIUS_BENCHMARK("immer::set/GC", benchmark_insert<generator__, immer::set<t__, std::hash<t__>,std::equal_to<t__>,gc_memory,5>>())
-#endif
-NONIUS_BENCHMARK("immer::set/UN", benchmark_insert<generator__, immer::set<t__, std::hash<t__>,std::equal_to<t__>,unsafe_memory,5>>())
diff --git a/third_party/immer/benchmark/set/iter.hpp b/third_party/immer/benchmark/set/iter.hpp
deleted file mode 100644
index 91dd48644367..000000000000
--- a/third_party/immer/benchmark/set/iter.hpp
+++ /dev/null
@@ -1,111 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#pragma once
-
-#include "benchmark/config.hpp"
-
-#include <immer/set.hpp>
-#include <immer/box.hpp>
-#include <immer/algorithm.hpp>
-#include <hash_trie.hpp> // Phil Nash
-#include <boost/container/flat_set.hpp>
-#include <set>
-#include <unordered_set>
-#include <numeric>
-
-namespace {
-
-template <typename T>
-struct iter_step
-{
-    unsigned operator() (unsigned x, const T& y) const
-    {
-        return x + y;
-    }
-};
-
-template <>
-struct iter_step<std::string>
-{
-    unsigned operator() (unsigned x, const std::string& y) const
-    {
-        return x + (unsigned) y.size();
-    }
-};
-
-template <>
-struct iter_step<immer::box<std::string>>
-{
-    unsigned operator() (unsigned x, const immer::box<std::string>& y) const
-    {
-        return x + (unsigned) y->size();
-    }
-};
-
-template <typename Generator, typename Set>
-auto benchmark_access_std_iter()
-{
-    return [] (nonius::chronometer meter)
-    {
-        auto n  = meter.param<N>();
-        auto g1 = Generator{}(n);
-
-        auto v = Set{};
-        for (auto i = 0u; i < n; ++i)
-            v.insert(g1[i]);
-
-        using step_t = iter_step<typename decltype(g1)::value_type>;
-        measure(meter, [&] {
-            volatile auto c = std::accumulate(v.begin(), v.end(), 0u, step_t{});
-            return c;
-        });
-    };
-}
-
-template <typename Generator, typename Set>
-auto benchmark_access_reduce()
-{
-    return [] (nonius::chronometer meter)
-    {
-        auto n = meter.param<N>();
-        auto g1 = Generator{}(n);
-
-        auto v = Set{};
-        for (auto i = 0u; i < n; ++i)
-            v = v.insert(g1[i]);
-
-        using step_t = iter_step<typename decltype(g1)::value_type>;
-        measure(meter, [&] {
-            volatile auto c = immer::accumulate(v, 0u, step_t{});
-            return c;
-        });
-    };
-}
-
-template <typename Generator, typename Set>
-auto benchmark_access_iter()
-{
-    return [] (nonius::chronometer meter)
-    {
-        auto n = meter.param<N>();
-        auto g1 = Generator{}(n);
-
-        auto v = Set{};
-        for (auto i = 0u; i < n; ++i)
-            v = v.insert(g1[i]);
-
-        using step_t = iter_step<typename decltype(g1)::value_type>;
-        measure(meter, [&] {
-            volatile auto c = std::accumulate(v.begin(), v.end(), 0u, step_t{});
-            return c;
-        });
-    };
-}
-
-} // namespace
diff --git a/third_party/immer/benchmark/set/iter.ipp b/third_party/immer/benchmark/set/iter.ipp
deleted file mode 100644
index f8c3cb9695cd..000000000000
--- a/third_party/immer/benchmark/set/iter.ipp
+++ /dev/null
@@ -1,25 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#include "iter.hpp"
-
-#ifndef GENERATOR_T
-#error "you must define a GENERATOR_T"
-#endif
-
-using generator__ = GENERATOR_T;
-using t__ = typename decltype(generator__{}(0))::value_type;
-
-NONIUS_BENCHMARK("iter/std::set", benchmark_access_std_iter<generator__, std::set<t__>>())
-NONIUS_BENCHMARK("iter/std::unordered_set", benchmark_access_std_iter<generator__, std::unordered_set<t__>>())
-NONIUS_BENCHMARK("iter/boost::flat_set", benchmark_access_std_iter<generator__, boost::container::flat_set<t__>>())
-NONIUS_BENCHMARK("iter/hamt::hash_trie", benchmark_access_std_iter<generator__, hamt::hash_trie<t__>>())
-NONIUS_BENCHMARK("iter/immer::set/5B", benchmark_access_iter<generator__, immer::set<t__, std::hash<t__>,std::equal_to<t__>,def_memory,5>>())
-NONIUS_BENCHMARK("iter/immer::set/4B", benchmark_access_iter<generator__, immer::set<t__, std::hash<t__>,std::equal_to<t__>,def_memory,4>>())
-NONIUS_BENCHMARK("reduce/immer::set/5B", benchmark_access_reduce<generator__, immer::set<t__, std::hash<t__>,std::equal_to<t__>,def_memory,5>>())
-NONIUS_BENCHMARK("reduce/immer::set/4B", benchmark_access_reduce<generator__, immer::set<t__, std::hash<t__>,std::equal_to<t__>,def_memory,4>>())
diff --git a/third_party/immer/benchmark/set/string-box/access.cpp b/third_party/immer/benchmark/set/string-box/access.cpp
deleted file mode 100644
index c3deffbb0636..000000000000
--- a/third_party/immer/benchmark/set/string-box/access.cpp
+++ /dev/null
@@ -1,10 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#include "generator.ipp"
-#include "../access.ipp"
diff --git a/third_party/immer/benchmark/set/string-box/generator.ipp b/third_party/immer/benchmark/set/string-box/generator.ipp
deleted file mode 100644
index 9adc82e0bdc0..000000000000
--- a/third_party/immer/benchmark/set/string-box/generator.ipp
+++ /dev/null
@@ -1,46 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#include <immer/box.hpp>
-
-#include <random>
-#include <vector>
-#include <cassert>
-#include <functional>
-#include <algorithm>
-
-#define GENERATOR_T generate_unsigned
-
-namespace {
-
-struct GENERATOR_T
-{
-    static constexpr auto char_set   = "_-0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
-    static constexpr auto max_length = 64;
-    static constexpr auto min_length = 8;
-
-    auto operator() (std::size_t runs) const
-    {
-        assert(runs > 0);
-        auto engine = std::default_random_engine{42};
-        auto dist = std::uniform_int_distribution<unsigned>{};
-        auto gen = std::bind(dist, engine);
-        auto r = std::vector<immer::box<std::string>>(runs);
-        std::generate_n(r.begin(), runs, [&] {
-            auto len = gen() % (max_length - min_length) + min_length;
-            auto str = std::string(len, ' ');
-            std::generate_n(str.begin(), len, [&] {
-                return char_set[gen() % sizeof(char_set)];
-            });
-            return str;
-        });
-        return r;
-    }
-};
-
-} // namespace
diff --git a/third_party/immer/benchmark/set/string-box/insert.cpp b/third_party/immer/benchmark/set/string-box/insert.cpp
deleted file mode 100644
index c5762498c23c..000000000000
--- a/third_party/immer/benchmark/set/string-box/insert.cpp
+++ /dev/null
@@ -1,11 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#define DISABLE_GC_BENCHMARKS
-#include "generator.ipp"
-#include "../insert.ipp"
diff --git a/third_party/immer/benchmark/set/string-box/iter.cpp b/third_party/immer/benchmark/set/string-box/iter.cpp
deleted file mode 100644
index 83e57e7845d3..000000000000
--- a/third_party/immer/benchmark/set/string-box/iter.cpp
+++ /dev/null
@@ -1,10 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#include "generator.ipp"
-#include "../iter.ipp"
diff --git a/third_party/immer/benchmark/set/string-long/access.cpp b/third_party/immer/benchmark/set/string-long/access.cpp
deleted file mode 100644
index c3deffbb0636..000000000000
--- a/third_party/immer/benchmark/set/string-long/access.cpp
+++ /dev/null
@@ -1,10 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#include "generator.ipp"
-#include "../access.ipp"
diff --git a/third_party/immer/benchmark/set/string-long/generator.ipp b/third_party/immer/benchmark/set/string-long/generator.ipp
deleted file mode 100644
index 386364cc96fe..000000000000
--- a/third_party/immer/benchmark/set/string-long/generator.ipp
+++ /dev/null
@@ -1,44 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#include <random>
-#include <vector>
-#include <cassert>
-#include <functional>
-#include <algorithm>
-
-#define GENERATOR_T generate_unsigned
-
-namespace {
-
-struct GENERATOR_T
-{
-    static constexpr auto char_set   = "_-0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
-    static constexpr auto max_length = 256;
-    static constexpr auto min_length = 32;
-
-    auto operator() (std::size_t runs) const
-    {
-        assert(runs > 0);
-        auto engine = std::default_random_engine{42};
-        auto dist = std::uniform_int_distribution<unsigned>{};
-        auto gen = std::bind(dist, engine);
-        auto r = std::vector<std::string>(runs);
-        std::generate_n(r.begin(), runs, [&] {
-            auto len = gen() % (max_length - min_length) + min_length;
-            auto str = std::string(len, ' ');
-            std::generate_n(str.begin(), len, [&] {
-                return char_set[gen() % sizeof(char_set)];
-            });
-            return str;
-        });
-        return r;
-    }
-};
-
-} // namespace
diff --git a/third_party/immer/benchmark/set/string-long/insert.cpp b/third_party/immer/benchmark/set/string-long/insert.cpp
deleted file mode 100644
index c5762498c23c..000000000000
--- a/third_party/immer/benchmark/set/string-long/insert.cpp
+++ /dev/null
@@ -1,11 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#define DISABLE_GC_BENCHMARKS
-#include "generator.ipp"
-#include "../insert.ipp"
diff --git a/third_party/immer/benchmark/set/string-long/iter.cpp b/third_party/immer/benchmark/set/string-long/iter.cpp
deleted file mode 100644
index 83e57e7845d3..000000000000
--- a/third_party/immer/benchmark/set/string-long/iter.cpp
+++ /dev/null
@@ -1,10 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#include "generator.ipp"
-#include "../iter.ipp"
diff --git a/third_party/immer/benchmark/set/string-short/access.cpp b/third_party/immer/benchmark/set/string-short/access.cpp
deleted file mode 100644
index c3deffbb0636..000000000000
--- a/third_party/immer/benchmark/set/string-short/access.cpp
+++ /dev/null
@@ -1,10 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#include "generator.ipp"
-#include "../access.ipp"
diff --git a/third_party/immer/benchmark/set/string-short/generator.ipp b/third_party/immer/benchmark/set/string-short/generator.ipp
deleted file mode 100644
index bd40d2d639a8..000000000000
--- a/third_party/immer/benchmark/set/string-short/generator.ipp
+++ /dev/null
@@ -1,44 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#include <random>
-#include <vector>
-#include <cassert>
-#include <functional>
-#include <algorithm>
-
-#define GENERATOR_T generate_unsigned
-
-namespace {
-
-struct GENERATOR_T
-{
-    static constexpr auto char_set   = "_-0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
-    static constexpr auto max_length = 15;
-    static constexpr auto min_length = 4;
-
-    auto operator() (std::size_t runs) const
-    {
-        assert(runs > 0);
-        auto engine = std::default_random_engine{42};
-        auto dist = std::uniform_int_distribution<unsigned>{};
-        auto gen = std::bind(dist, engine);
-        auto r = std::vector<std::string>(runs);
-        std::generate_n(r.begin(), runs, [&] {
-            auto len = gen() % (max_length - min_length) + min_length;
-            auto str = std::string(len, ' ');
-            std::generate_n(str.begin(), len, [&] {
-                return char_set[gen() % sizeof(char_set)];
-            });
-            return str;
-        });
-        return r;
-    }
-};
-
-} // namespace
diff --git a/third_party/immer/benchmark/set/string-short/insert.cpp b/third_party/immer/benchmark/set/string-short/insert.cpp
deleted file mode 100644
index 26dfbce29204..000000000000
--- a/third_party/immer/benchmark/set/string-short/insert.cpp
+++ /dev/null
@@ -1,10 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#include "generator.ipp"
-#include "../insert.ipp"
diff --git a/third_party/immer/benchmark/set/string-short/iter.cpp b/third_party/immer/benchmark/set/string-short/iter.cpp
deleted file mode 100644
index 83e57e7845d3..000000000000
--- a/third_party/immer/benchmark/set/string-short/iter.cpp
+++ /dev/null
@@ -1,10 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#include "generator.ipp"
-#include "../iter.ipp"
diff --git a/third_party/immer/benchmark/set/unsigned/access.cpp b/third_party/immer/benchmark/set/unsigned/access.cpp
deleted file mode 100644
index c3deffbb0636..000000000000
--- a/third_party/immer/benchmark/set/unsigned/access.cpp
+++ /dev/null
@@ -1,10 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#include "generator.ipp"
-#include "../access.ipp"
diff --git a/third_party/immer/benchmark/set/unsigned/generator.ipp b/third_party/immer/benchmark/set/unsigned/generator.ipp
deleted file mode 100644
index 2a2a2a0fb627..000000000000
--- a/third_party/immer/benchmark/set/unsigned/generator.ipp
+++ /dev/null
@@ -1,32 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#include <random>
-#include <vector>
-#include <cassert>
-#include <functional>
-#include <algorithm>
-
-#define GENERATOR_T generate_unsigned
-
-namespace {
-
-struct GENERATOR_T
-{
-    auto operator() (std::size_t runs) const
-    {
-        assert(runs > 0);
-        auto engine = std::default_random_engine{42};
-        auto dist = std::uniform_int_distribution<unsigned>{};
-        auto r = std::vector<unsigned>(runs);
-        std::generate_n(r.begin(), runs, std::bind(dist, engine));
-        return r;
-    }
-};
-
-} // namespace
diff --git a/third_party/immer/benchmark/set/unsigned/insert.cpp b/third_party/immer/benchmark/set/unsigned/insert.cpp
deleted file mode 100644
index 26dfbce29204..000000000000
--- a/third_party/immer/benchmark/set/unsigned/insert.cpp
+++ /dev/null
@@ -1,10 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#include "generator.ipp"
-#include "../insert.ipp"
diff --git a/third_party/immer/benchmark/set/unsigned/iter.cpp b/third_party/immer/benchmark/set/unsigned/iter.cpp
deleted file mode 100644
index 83e57e7845d3..000000000000
--- a/third_party/immer/benchmark/set/unsigned/iter.cpp
+++ /dev/null
@@ -1,10 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#include "generator.ipp"
-#include "../iter.ipp"