Mercurial > projects > orange
annotate orange/util/Use.d @ 1:11a31bd929f9
Removed dependency on private library
| author | Jacob Carlborg <doob@me.com> |
|---|---|
| date | Mon, 31 May 2010 16:06:36 +0200 |
| parents | f7b078e85f7f |
| children | 78e5fef4bbf2 |
| rev | line source |
|---|---|
| 0 | 1 /** |
| 2 * Copyright: Copyright (c) 2010 Jacob Carlborg. | |
| 3 * Authors: Jacob Carlborg | |
| 4 * Version: Initial created: Jan 29, 2010 | |
| 5 * License: $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost Software License 1.0) | |
| 6 */ | |
| 7 module orange.util.Use; | |
| 8 | |
| 9 version (Tango) | |
| 10 { | |
| 11 import tango.core.Tuple; | |
| 12 import tango.core.Traits; | |
| 13 } | |
| 14 | |
| 15 else | |
| 16 { | |
| 17 import std.typetuple; | |
| 18 import std.traits; | |
| 19 | |
| 20 alias ReturnType ReturnTypeOf; | |
| 21 alias ParameterTypeTuple ParameterTupleOf; | |
| 22 } | |
| 23 | |
| 24 struct OpInStruct (ARGS...) | |
| 25 { | |
| 26 static assert (ARGS.length > 0); | |
| 27 | |
| 28 private | |
| 29 { | |
| 30 alias ReturnTypeOf!(ARGS[0]) ReturnType; | |
| 31 | |
| 32 static if (ARGS.length >= 2) | |
| 33 alias Tuple!(ReturnType delegate (ARGS), ARGS[1 .. $]) NEW_ARGS; | |
| 34 | |
| 35 else | |
| 36 alias Tuple!(ReturnType delegate (ARGS)) NEW_ARGS; | |
| 37 } | |
| 38 | |
| 39 NEW_ARGS args; | |
| 40 | |
| 41 ReturnType opIn (ARGS[0] dg) | |
| 42 { | |
| 43 assert(args[0]); | |
| 44 | |
| 45 static if (NEW_ARGS.length == 1) | |
| 46 return args[0](dg); | |
| 47 | |
| 48 else | |
| 49 return args[0](dg, args[1 .. $]); | |
| 50 } | |
| 51 } | |
| 52 | |
| 53 struct RestoreStruct (U, T) | |
| 54 { | |
| 55 U delegate(U delegate (), ref T) dg; | |
| 56 T* value; | |
| 57 | |
| 58 U opIn (U delegate () deleg) | |
| 59 { | |
| 60 return dg(deleg, *value); | |
| 61 } | |
| 62 } | |
|
1
11a31bd929f9
Removed dependency on private library
Jacob Carlborg <doob@me.com>
parents:
0
diff
changeset
|
63 |
| 0 | 64 RestoreStruct!(U, T) restore (U = void, T) (ref T val) |
| 65 { | |
| 66 RestoreStruct!(U, T) restoreStruct; | |
| 67 | |
| 68 restoreStruct.dg = (U delegate () dg, ref T value){ | |
| 69 T t = value; | |
| 70 | |
| 71 static if (is(U == void)) | |
| 72 { | |
| 73 dg(); | |
| 74 value = t; | |
| 75 } | |
| 76 | |
| 77 else | |
| 78 { | |
| 79 auto result = dg(); | |
| 80 value = t; | |
| 81 | |
| 82 return result; | |
| 83 } | |
| 84 }; | |
| 85 | |
| 86 restoreStruct.value = &val; | |
| 87 | |
| 88 return restoreStruct; | |
| 89 } |