1 | #Region "Microsoft.VisualBasic::3b37d844a99d6529dd03c3d1f459dfe2, Microsoft.VisualBasic.Core\Extensions\Reflection\Methods.vb" |
2 | |
3 | ' Author: |
4 | ' |
5 | ' asuka (amethyst.asuka@gcmodeller.org) |
6 | ' xie (genetics@smrucc.org) |
7 | ' xieguigang (xie.guigang@live.com) |
8 | ' |
9 | ' Copyright (c) 2018 GPL3 Licensed |
10 | ' |
11 | ' |
12 | ' GNU GENERAL PUBLIC LICENSE (GPL3) |
13 | ' |
14 | ' |
15 | ' This program is free software: you can redistribute it and/or modify |
16 | ' it under the terms of the GNU General Public License as published by |
17 | ' the Free Software Foundation, either version 3 of the License, or |
18 | ' (at your option) any later version. |
19 | ' |
20 | ' This program is distributed in the hope that it will be useful, |
21 | ' but WITHOUT ANY WARRANTY; without even the implied warranty of |
22 | ' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
23 | ' GNU General Public License for more details. |
24 | ' |
25 | ' You should have received a copy of the GNU General Public License |
26 | ' along with this program. If not, see <http://www.gnu.org/licenses/>. |
27 | |
28 | |
29 | |
30 | ' /********************************************************************************/ |
31 | |
32 | ' Summaries: |
33 | |
34 | ' Module MethodsExtension |
35 | ' |
36 | ' Function: (+2 Overloads) AsLazy, (+2 Overloads) Invoke, (+2 Overloads) TryInvoke |
37 | ' |
38 | ' /********************************************************************************/ |
39 | |
40 | #End Region |
41 | |
42 | Imports System.Linq.Expressions |
43 | Imports System.Reflection |
44 | Imports System.Runtime.CompilerServices |
45 | |
46 | Public Module MethodsExtension |
47 | |
48 | ''' <summary> |
49 | ''' 尝试将目标对象放入到函数指针之中来运行,运行失败的时候回返回<paramref name="default"/>默认值 |
50 | ''' </summary> |
51 | ''' <typeparam name="T"></typeparam> |
52 | ''' <typeparam name="TOut"></typeparam> |
53 | ''' <param name="input"></param> |
54 | ''' <param name="proc"></param> |
55 | ''' <param name="[default]"></param> |
56 | ''' <returns></returns> |
57 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
58 | <Extension> Public Function TryInvoke(Of T, TOut)(proc As Func(Of T, TOut), input As T, Optional [default] As TOut = Nothing) As TOut |
59 | Return New Func(Of TOut)(Function() proc(input)).TryInvoke([default]) |
60 | End Function |
61 | |
62 | <Extension> Public Function TryInvoke(Of T)(proc As Func(Of T), Optional [default] As T = Nothing) As T |
63 | Try |
64 | Return proc() |
65 | Catch ex As Exception |
66 | Call App.LogException(ex) |
67 | Return [default] |
68 | End Try |
69 | End Function |
70 | |
71 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
72 | <Extension> |
73 | Public Function AsLazy(Of T)(factory As Func(Of T)) As Lazy(Of T) |
74 | Return New Lazy(Of T)(factory) |
75 | End Function |
76 | |
77 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
78 | <Extension> |
79 | Public Function AsLazy(Of T)(lambda As LambdaExpression) As Lazy(Of T) |
80 | Return DirectCast(lambda.Compile, Func(Of T)).AsLazy |
81 | End Function |
82 | |
83 | ''' <summary> |
84 | ''' Invoke a static method without parameters |
85 | ''' </summary> |
86 | ''' <typeparam name="T"></typeparam> |
87 | ''' <param name="method"></param> |
88 | ''' <returns></returns> |
89 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
90 | <Extension> |
91 | Public Function Invoke(Of T)(method As MethodInfo) As T |
92 | Return method.Invoke(Nothing, Nothing) |
93 | End Function |
94 | |
95 | ''' <summary> |
96 | ''' Invoke a static method without parameters |
97 | ''' </summary> |
98 | ''' <param name="method"></param> |
99 | ''' <returns></returns> |
100 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
101 | <Extension> |
102 | Public Function Invoke(method As MethodInfo) As Object |
103 | Return method.Invoke(Nothing, Nothing) |
104 | End Function |
105 | End Module |