(conan-io#12964) eternal: add recipe

* eternal: add recipe

* remove comment

* add limits header

* remove apply_conandata_patches

Co-authored-by: Chris Mc <prince.chrismc@gmail.com>

* fix msvc version number

Co-authored-by: Chris Mc <prince.chrismc@gmail.com>

recipes/eternal/all/conandata.yml

@@ -0,0 +1,4 @@
+sources:
+  "1.0.1":
+    url: "https://github.com/mapbox/eternal/archive/refs/tags/v1.0.1.tar.gz"
+    sha256: "7d799381b3786d0bd987eea75df2a81f581a64ee962e922a2f7a7d3d0c3d0421"

recipes/eternal/all/conanfile.py

@@ -0,0 +1,69 @@
+from conan import ConanFile
+from conan.errors import ConanInvalidConfiguration
+from conan.tools.files import get, copy
+from conan.tools.build import check_min_cppstd
+from conan.tools.scm import Version
+from conan.tools.layout import basic_layout
+import os
+
+
+required_conan_version = ">=1.51.3"
+
+
+class EternalConan(ConanFile):
+    name = "eternal"
+    description = "A C++14 compile-time/constexpr map and hash map with minimal binary footprint"
+    license = "ISC"
+    url = "https://github.com/conan-io/conan-center-index"
+    homepage = "https://github.com/mapbox/eternal"
+    topics = ("hashing", "map", "constexpr", "header-only")
+    settings = "os", "arch", "compiler", "build_type"
+    no_copy_source = True
+
+    @property
+    def _minimum_cpp_standard(self):
+        return 14
+
+    @property
+    def _compilers_minimum_version(self):
+        return {
+            "Visual Studio": "15",
+            "msvc": "191",
+            "gcc": "5",
+            "clang": "4",
+            "apple-clang": "10",
+        }
+
+    def export_sources(self):
+        for p in self.conan_data.get("patches", {}).get(self.version, []):
+            copy(self, p["patch_file"], self.recipe_folder, self.export_sources_folder)
+
+    def layout(self):
+        basic_layout(self, src_folder="src")
+
+    def package_id(self):
+        self.info.clear()
+
+    def validate(self):
+        if self.settings.get_safe("compiler.cppstd"):
+            check_min_cppstd(self, self._minimum_cpp_standard)
+        minimum_version = self._compilers_minimum_version.get(str(self.settings.compiler), False)
+        if minimum_version and Version(self.settings.get_safe("compiler.version")) < minimum_version:
+            raise ConanInvalidConfiguration(f"{self.ref} requires C++{self._minimum_cpp_standard}, which your compiler does not support.")
+
+    def source(self):
+        get(self, **self.conan_data["sources"][self.version],
+            destination=self.source_folder, strip_root=True)
+
+    def build(self):
+        pass
+
+    def package(self):
+        copy(self, pattern="LICENSE.md", dst=os.path.join(self.package_folder, "licenses"), src=self.source_folder)
+        copy(self, pattern="*.hpp", dst=os.path.join(self.package_folder, "include"), src=os.path.join(self.source_folder, "include"))
+
+    def package_info(self):
+        self.cpp_info.bindirs = []
+        self.cpp_info.frameworkdirs = []
+        self.cpp_info.libdirs = []
+        self.cpp_info.resdirs = []

recipes/eternal/all/test_package/CMakeLists.txt

@@ -0,0 +1,9 @@
+cmake_minimum_required(VERSION 3.8)
+
+project(test_package CXX)
+
+find_package(eternal REQUIRED CONFIG)
+
+add_executable(${PROJECT_NAME} test_package.cpp)
+target_link_libraries(${PROJECT_NAME} PRIVATE eternal::eternal)
+target_compile_features(${PROJECT_NAME} PRIVATE cxx_std_14)

recipes/eternal/all/test_package/conanfile.py

@@ -0,0 +1,26 @@
+from conan import ConanFile
+from conan.tools.build import can_run
+from conan.tools.cmake import cmake_layout, CMake
+import os
+
+
+class TestPackageConan(ConanFile):
+    settings = "os", "arch", "compiler", "build_type"
+    generators = "CMakeDeps", "CMakeToolchain", "VirtualRunEnv"
+    test_type = "explicit"
+
+    def requirements(self):
+        self.requires(self.tested_reference_str)
+
+    def layout(self):
+        cmake_layout(self)
+
+    def build(self):
+        cmake = CMake(self)
+        cmake.configure()
+        cmake.build()
+
+    def test(self):
+        if can_run(self):
+            bin_path = os.path.join(self.cpp.build.bindirs[0], "test_package")
+            self.run(bin_path, env="conanrun")

recipes/eternal/all/test_package/test_package.cpp

@@ -0,0 +1,41 @@
+#include <iostream>
+#include <cmath>
+#include <limits>
+
+#include "mapbox/eternal.hpp"
+
+struct Color {
+    constexpr inline Color() {
+    }
+    constexpr inline Color(unsigned char r_, unsigned char g_, unsigned char b_, float a_)
+        : r(r_), g(g_), b(b_), a(a_ > 1 ? 1 : a_ < 0 ? 0 : a_) {
+    }
+    unsigned char r = 0, g = 0, b = 0;
+    float a = 1.0f;
+
+    constexpr bool operator==(const Color& rhs) const {
+        return r == rhs.r && g == rhs.g && b == rhs.b &&
+               (a >= rhs.a ? a - rhs.a : rhs.a - a) < std::numeric_limits<float>::epsilon();
+    }
+};
+
+MAPBOX_ETERNAL_CONSTEXPR const auto multi_colors = mapbox::eternal::map<mapbox::eternal::string, Color>({
+    { "red", { 255, 0, 0, 1 } },
+    { "yellow", { 255, 255, 0, 1 } },
+    { "white", { 255, 255, 255, 1 } }, // comes before yellow!
+    { "yellow", { 255, 220, 0, 1 } },  // a darker yellow
+});
+
+int main(void) {
+    static_assert(!multi_colors.unique(), "multi_colors are not unique");
+    static_assert(multi_colors.find("yellow") != multi_colors.end(), "colors contains yellow");
+    static_assert(multi_colors.find("yellow")->second == Color(255, 255, 0, 1), "yellow returns the correct color");
+    static_assert((++multi_colors.find("yellow"))->second == Color(255, 220, 0, 1), "yellow returns the correct color");
+    static_assert(multi_colors.equal_range("white").first == multi_colors.find("white"), "white range returns the correct begin");
+    static_assert(multi_colors.equal_range("white").second == multi_colors.find("yellow"), "white range end is the next color");
+    static_assert(multi_colors.equal_range("yellow").first == multi_colors.find("yellow"), "yellow range returns the correct begin");
+    static_assert(multi_colors.equal_range("yellow").second == multi_colors.end(), "yellow range end returns end");
+    static_assert(multi_colors.count("yellow") == 2, "has 2 yellows");
+
+    return EXIT_SUCCESS;
+}

recipes/eternal/all/test_v1_package/CMakeLists.txt

@@ -0,0 +1,12 @@
+cmake_minimum_required(VERSION 3.8)
+
+project(test_package CXX)
+
+include(${CMAKE_BINARY_DIR}/conanbuildinfo.cmake)
+conan_basic_setup(TARGETS)
+
+find_package(eternal REQUIRED CONFIG)
+
+add_executable(${PROJECT_NAME} ../test_package/test_package.cpp)
+target_link_libraries(${PROJECT_NAME} PRIVATE eternal::eternal)
+target_compile_features(${PROJECT_NAME} PRIVATE cxx_std_14)

recipes/eternal/all/test_v1_package/conanfile.py

@@ -0,0 +1,18 @@
+from conans import ConanFile, CMake
+from conan.tools.build import cross_building
+import os
+
+
+class TestPackageV1Conan(ConanFile):
+    settings = "os", "arch", "compiler", "build_type"
+    generators = "cmake", "cmake_find_package_multi"
+
+    def build(self):
+        cmake = CMake(self)
+        cmake.configure()
+        cmake.build()
+
+    def test(self):
+        if not cross_building(self):
+            bin_path = os.path.join("bin", "test_package")
+            self.run(bin_path, run_environment=True)

recipes/eternal/config.yml

@@ -0,0 +1,3 @@
+versions:
+  "1.0.1":
+    folder: all