Add 'immer' package (#104)

* Initial commit

* Add example

* Try first compile

* First working test.

* Fix docu

* Add pull request number

* Fix docu

* Fix docu

cmake/configs/default.cmake

@@ -77,6 +77,7 @@ hunter_default_version(HastyNoise VERSION 0.8.3)
 hunter_default_version(ICU VERSION 63.1-p5)
 hunter_default_version(IF97 VERSION 2.1.2)
 hunter_default_version(Igloo VERSION 1.1.1-hunter)
+hunter_default_version(Immer VERSION 0.6.2-cf44615)
 hunter_default_version(Jpeg VERSION 9c-p0)
 hunter_default_version(JsonSpirit VERSION 0.0.4-hunter)
 hunter_default_version(LAPACK VERSION 3.7.1)

cmake/projects/Immer/hunter.cmake

@@ -0,0 +1,24 @@
+# !!! DO NOT PLACE HEADER GUARDS HERE !!!
+
+include(hunter_add_version)
+include(hunter_cacheable)
+include(hunter_download)
+include(hunter_pick_scheme)
+
+hunter_add_version(
+    PACKAGE_NAME
+    Immer
+    VERSION
+    0.6.2-cf44615
+    URL
+    "https://github.com/arximboldi/immer/archive/cf446157834335887c2f89418e5dad3d00abfb85.zip"
+    SHA1
+    ec88a3d4757c931697f0f9e2aac70e1b50961cf0
+)
+
+hunter_pick_scheme(DEFAULT url_sha1_cmake)
+hunter_cacheable(Immer)
+hunter_download(
+    PACKAGE_NAME Immer
+    PACKAGE_INTERNAL_DEPS_ID "1"
+)

docs/packages/pkg/Immer.rst

@@ -0,0 +1,20 @@
+.. spelling::
+
+    Immer
+
+.. index::
+  single: unsorted ; Immer
+
+.. _pkg.Immer:
+
+Immer
+=====
+
+-  `Official <https://github.com/arximboldi/immer>`__
+-  `Example <https://github.com/cpp-pm/hunter/blob/master/examples/Immer/CMakeLists.txt>`__
+-  Added by `Joerg-Christian Boehme <https://github.com/Bjoe>`__ (`pr-104 <https://github.com/cpp-pm/hunter/pull/104>`__)
+
+.. literalinclude:: /../examples/Immer/CMakeLists.txt
+  :language: cmake
+  :start-after: # DOCUMENTATION_START {
+  :end-before: # DOCUMENTATION_END }

examples/Immer/CMakeLists.txt

@@ -0,0 +1,18 @@
+# Copyright (c) 2016-2018, Ruslan Baratov
+# All rights reserved.
+
+cmake_minimum_required(VERSION 3.2)
+
+# Emulate HunterGate:
+# * https://github.com/hunter-packages/gate
+include("../common.cmake")
+
+project(immer)
+
+# DOCUMENTATION_START {
+hunter_add_package(Immer)
+find_package(Immer CONFIG REQUIRED)
+
+add_executable(boo boo.cpp)
+target_link_libraries(boo PUBLIC immer)
+# DOCUMENTATION_END }

examples/Immer/boo.cpp

@@ -0,0 +1,14 @@
+#include <immer/box.hpp>
+#include <cassert>
+#include <string>
+
+int main()
+{
+    auto v1 = immer::box<std::string>{"hello"};
+    auto v2 = v1.update([&] (auto l) {
+        return l + ", world!";
+    });
+
+    assert((v1 == immer::box<std::string>{"hello"}));
+    assert((v2 == immer::box<std::string>{"hello, world!"}));
+}