58 lines
1.4 KiB
D
58 lines
1.4 KiB
D
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/**
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* Copyright: Eugene Wissner 2016.
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* License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
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* Mozilla Public License, v. 2.0).
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* Authors: $(LINK2 mailto:belka@caraus.de, Eugene Wissner)
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*/
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module tanya.traits;
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import std.traits;
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import std.meta;
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/**
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* Params:
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* T = Type.
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*
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* Returns: $(D_KEYWORD true) if $(D_PARAM T) is a reference type or a pointer,
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* $(D_KEYWORD false) otherwise.
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*/
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enum bool isReference(T) = isDynamicArray!T || isPointer!T
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|| is(T == class) || is(T == interface);
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/**
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* Initializer list.
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*
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* Generates a static array with elements from $(D_PARAM args). All elements
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* should have the same type. It can be used in constructors which accept a
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* list of the elements of the same type in the situations where variadic
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* functions and templates can't be used.
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*
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* Params:
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* Args = Argument type.
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* args = Arguments.
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*/
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static enum IL(Args...)(Args args)
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if (Args.length > 0)
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{
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alias BaseType = typeof(args[0]);
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BaseType[args.length] result;
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foreach (i, a; args)
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{
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static assert(isImplicitlyConvertible!(typeof(a), BaseType));
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result[i] = a;
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}
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return result;
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}
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///
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unittest
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{
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static assert(IL(1, 5, 8).length == 3);
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}
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