Add xtd::linq::from methods

src/xtd.core/CMakeLists.txt

@@ -794,6 +794,8 @@ add_sources(
   include/xtd/linq/enumerable
   include/xtd/linq/enumerable_collection.hpp
   include/xtd/linq/enumerable_collection
+  include/xtd/linq/from.hpp
+  include/xtd/linq/from
   include/xtd/media/system_sound.hpp
   include/xtd/media/system_sound
   include/xtd/media/system_sounds.hpp

src/xtd.core/include/xtd/linq/enumerable.hpp

@@ -1,5 +1,5 @@
 /// @file
-/// @brief Contains xtd::collections::generic::enumerable <type_t> class.
+/// @brief Contains xtd::linq::enumerable <type_t> class.
 /// @copyright Copyright (c) 2024 Gammasoft. All rights reserved.
 #pragma once
 #include "../collections/generic/helpers/allocator.hpp"
@@ -38,7 +38,7 @@ namespace xtd {
     /// ```
     /// @par Header
     /// ```cpp
-    /// #include <xtd/linq/enumerable
+    /// #include <xtd/linq/enumerable>
     /// ```
     /// @par Namespace
     /// xtd::linq
@@ -1239,3 +1239,4 @@ namespace xtd {
 }
 
 #include "../collections/generic/extensions/enumerable.hpp"
+#include "from.hpp"

src/xtd.core/include/xtd/linq/from

@@ -0,0 +1,2 @@
+#pragma once
+#include "from.hpp"

src/xtd.core/include/xtd/linq/from.hpp

@@ -0,0 +1,80 @@
+/// @file
+/// @brief Contains xtd::linq::from methods.
+/// @copyright Copyright (c) 2024 Gammasoft. All rights reserved.
+#pragma once
+#include "enumerable.hpp"
+
+/// @brief The xtd namespace contains all fundamental classes to access Hardware, Os, System, and more.
+namespace xtd {
+  /// @brief Provides classes and interfaces that support queries that use Language-Integrated Query (LINQ).
+  namespace linq {
+    /// @brief Returns the input typed as xtd::collection::generic::ienumerable <type_t>.
+    /// @param source A sequence of values.
+    /// @return The input sequence typed as xtd::collection::generic::ienumerable <type_t>.
+    /// @par Header
+    /// ```cpp
+    /// #include <xtd/linq/from>
+    /// ```
+    /// @par Namespace
+    /// xtd::linq
+    /// @par Library
+    /// xtd.core
+    /// @ingroup xtd_core linq
+    template <typename source_t>
+    const auto& from(const xtd::collections::generic::ienumerable<source_t>& source) {
+      return enumerable::as_enumerable(source);
+    }
+
+    /// @brief Returns the input typed as xtd::collection::generic::ienumerable <type_t>.
+    /// @param source A sequence of values.
+    /// @return The input sequence typed as xtd::collection::generic::ienumerable <type_t>.
+    /// @par Header
+    /// ```cpp
+    /// #include <xtd/linq/from>
+    /// ```
+    /// @par Namespace
+    /// xtd::linq
+    /// @par Library
+    /// xtd.core
+    /// @ingroup xtd_core linq
+    template <typename source_t>
+    const auto& from(const std::initializer_list<source_t>& source) {
+      return enumerable::as_enumerable(source);
+    }
+
+    /// @brief Returns the input typed as xtd::collection::generic::ienumerable <type_t>.
+    /// @param source A sequence of values.
+    /// @return The input sequence typed as xtd::collection::generic::ienumerable <type_t>.
+    /// @par Header
+    /// ```cpp
+    /// #include <xtd/linq/from>
+    /// ```
+    /// @par Namespace
+    /// xtd::linq
+    /// @par Library
+    /// xtd.core
+    /// @ingroup xtd_core linq
+    template <typename collection_t>
+    const auto& from(const collection_t& source) {
+      return enumerable::as_enumerable(source);
+    }
+
+    /// @brief Returns the input typed as xtd::collection::generic::ienumerable <type_t>.
+    /// @param first The first iterator.
+    /// @param last The last iterator.
+    /// @return The input sequence typed as xtd::collection::generic::ienumerable <type_t>.
+    /// @par Header
+    /// ```cpp
+    /// #include <xtd/linq/from>
+    /// ```
+    /// @par Namespace
+    /// xtd::linq
+    /// @par Library
+    /// xtd.core
+    /// @ingroup xtd_core linq
+    template <typename input_iterator_t>
+    const auto& from(input_iterator_t first, input_iterator_t last) {
+      return enumerable::as_enumerable(first, last);
+    }
+  }
+}