about summary refs log tree commit diff
path: root/third_party/immer/example/set/intro.cpp
diff options
context:
space:
mode:
authorVincent Ambo <mail@tazj.in>2020-07-15T07·20+0100
committerVincent Ambo <mail@tazj.in>2020-07-15T07·23+0100
commit1213b086a1015a662ab7ebd658f784534fd3116a (patch)
treed3bc8f3b7f40b8b60f0ef6fbd649cf765f4fdfb6 /third_party/immer/example/set/intro.cpp
parent1390827b9ea1e04bc9863e48930bfd16db3b716e (diff)
parent7f19d641647ac4ef313ed88d6b5c140983ce5436 (diff)
merge(3p/immer): Subtree merge at 'ad3e3556d' as 'third_party/immer' r/1299
Change-Id: I9636a41ad44b4218293833fd3e9456d9b07c731b
Diffstat (limited to 'third_party/immer/example/set/intro.cpp')
-rw-r--r--third_party/immer/example/set/intro.cpp22
1 files changed, 22 insertions, 0 deletions
diff --git a/third_party/immer/example/set/intro.cpp b/third_party/immer/example/set/intro.cpp
new file mode 100644
index 000000000000..be932ce65475
--- /dev/null
+++ b/third_party/immer/example/set/intro.cpp
@@ -0,0 +1,22 @@
+//
+// 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:intro/start
+#include <immer/set.hpp>
+int main()
+{
+    const auto v0 = immer::set<int>{};
+    const auto v1 = v0.insert(42);
+    assert(v0.count(42) == 0);
+    assert(v1.count(42) == 1);
+
+    const auto v2 = v1.erase(42);
+    assert(v1.count(42) == 1);
+    assert(v2.count(42) == 0);
+}
+// include:intro/end