diff options
Diffstat (limited to 'source')
| -rw-r--r-- | source/tanya/meta/package.d | 17 | ||||
| -rw-r--r-- | source/tanya/meta/transform.d | 112 |
2 files changed, 129 insertions, 0 deletions
diff --git a/source/tanya/meta/package.d b/source/tanya/meta/package.d new file mode 100644 index 0000000..9520c4b --- /dev/null +++ b/source/tanya/meta/package.d @@ -0,0 +1,17 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/** + * Template metaprogramming. + * + * Copyright: Eugene Wissner 2017. + * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/, + * Mozilla Public License, v. 2.0). + * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner) + * Source: $(LINK2 https://github.com/caraus-ecms/tanya/blob/master/source/tanya/meta/package.d, + * tanya/meta/package.d) + */ +module tanya.meta; + +public import tanya.meta.transform; diff --git a/source/tanya/meta/transform.d b/source/tanya/meta/transform.d new file mode 100644 index 0000000..bec52c8 --- /dev/null +++ b/source/tanya/meta/transform.d @@ -0,0 +1,112 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/** + * Type transformations. + * + * Templates in this module applied to a type produce a transformed type. + * + * Copyright: Eugene Wissner 2017. + * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/, + * Mozilla Public License, v. 2.0). + * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner) + * Source: $(LINK2 https://github.com/caraus-ecms/tanya/blob/master/source/tanya/meta/transform.d, + * tanya/meta/transform.d) + */ +module tanya.meta.transform; + +/** + * Removes any type qualifiers from $(D_PARAM T). + * + * Removed qualifiers are: + * $(UL + * $(LI const) + * $(LI immutable) + * $(LI inout) + * $(LI shared) + * ) + * and combinations of these. + * + * If the type $(D_PARAM T) doesn't have any qualifieres, + * $(D_INLINECODE Unqual!T) becomes an alias for $(D_PARAM T). + * + * Params: + * T = A type. + */ +template Unqual(T) +{ + static if (is(T U == const U) + || is(T U == immutable U) + || is(T U == inout U) + || is(T U == inout const U) + || is(T U == shared U) + || is(T U == shared const U) + || is(T U == shared inout U) + || is(T U == shared inout const U)) + { + alias Unqual = U; + } + else + { + alias Unqual = T; + } +} + +/// +pure nothrow @safe @nogc unittest +{ + static assert(is(Unqual!bool == bool)); + static assert(is(Unqual!(immutable bool) == bool)); + static assert(is(Unqual!(inout bool) == bool)); + static assert(is(Unqual!(inout const bool) == bool)); + static assert(is(Unqual!(shared bool) == bool)); + static assert(is(Unqual!(shared const bool) == bool)); + static assert(is(Unqual!(shared inout const bool) == bool)); +} + +/** + * If $(D_PARAM T) is an $(D_KEYWORD enum), $(D_INLINECODE OriginalType!T) evaluates to the + * most base type of that $(D_KEYWORD enum) and to $(D_PARAM T) otherwise. + * + * Params: + * T = A type. + */ +template OriginalType(T) +{ + static if (is(T U == enum)) + { + alias OriginalType = OriginalType!U; + } + else + { + alias OriginalType = T; + } +} + +/// +pure nothrow @safe @nogc unittest +{ + enum E1 : const(int) + { + n = 0, + } + enum E2 : bool + { + t = true, + } + enum E3 : E2 + { + t = E2.t, + } + enum E4 : const(E2) + { + t = E2.t, + } + + static assert(is(OriginalType!E1 == const int)); + static assert(is(OriginalType!E2 == bool)); + static assert(is(OriginalType!E3 == bool)); + static assert(is(OriginalType!E4 == bool)); + static assert(is(OriginalType!(const E4) == bool)); +} |