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Редактировал(а) Alexandr Fokin 2025/05/13 13:04
От версии 2.10
отредактировано Alexandr Fokin
на 2025/05/13 13:01
на 2025/05/13 13:01
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К версии 2.12
отредактировано Alexandr Fokin
на 2025/05/13 13:04
на 2025/05/13 13:04
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... ... @@ -34,46 +34,48 @@ 34 34 public static ConstructorDelegate GetConstructorWithArgsDelegate( 35 35 ConstructorInfo constructorInfo) 36 36 { 37 -ParameterExpression constructorParameters = Expression.Parameter(typeof(object?[])); 38 - 39 -Expression[] parameterExpressions; 40 -{ 41 - ParameterInfo[] parametersInfos = constructorInfo.GetParameters(); 42 - parameterExpressions = new Expression[parametersInfos.Length]; 43 - 44 - for (int i = 0; i < parametersInfos.Length; i++) 45 - { 46 - ConstantExpression ithIndex = Expression.Constant(i); 47 - BinaryExpression ithParameter = Expression.ArrayIndex( 48 - constructorParameters, 49 - ithIndex); 50 - UnaryExpression unboxedIthParameter = Expression.Convert( 51 - ithParameter, 52 - parametersInfos[i].ParameterType 53 - ); 54 - parameterExpressions[i] = unboxedIthParameter; 55 - } 56 -} 57 - 58 -NewExpression constructorCallExp = Expression.New( 59 - constructorInfo, 60 - parameterExpressions); 61 - 62 -var convertResultExp = Expression.Convert( 63 - constructorCallExp, 64 - typeof(object) 37 + ParameterExpression constructorParameters = Expression.Parameter(typeof(object?[])); 38 + 39 + Expression[] parameterExpressions; 40 + { 41 + ParameterInfo[] parametersInfos = constructorInfo.GetParameters(); 42 + parameterExpressions = new Expression[parametersInfos.Length]; 43 + 44 + for (int i = 0; i < parametersInfos.Length; i++) 45 + { 46 + ConstantExpression ithIndex = Expression.Constant(i); 47 + BinaryExpression ithParameter = Expression.ArrayIndex( 48 + constructorParameters, 49 + ithIndex); 50 + UnaryExpression unboxedIthParameter = Expression.Convert( 51 + ithParameter, 52 + parametersInfos[i].ParameterType 65 65 ); 66 - 67 -var constructorHandler = Expression 68 - .Lambda<ConstructorDelegate>( 69 - convertResultExp, 70 - constructorParameters 71 - ) 72 - .Compile(); 73 - 74 -return constructorHandler; 75 -}{{/code}}|C# Expression tree: object array to Expression.New() parameters 54 + parameterExpressions[i] = unboxedIthParameter; 55 + } 56 + } 57 + 58 + NewExpression constructorCallExp = Expression.New( 59 + constructorInfo, 60 + parameterExpressions); 61 + 62 + var convertResultExp = Expression.Convert( 63 + constructorCallExp, 64 + typeof(object) 65 + ); 66 + 67 + var constructorHandler = Expression 68 + .Lambda<ConstructorDelegate>( 69 + convertResultExp, 70 + constructorParameters 71 + ) 72 + .Compile(); 73 + 74 + return constructorHandler; 75 +}{{/code}}|{{code language="c#"}}object Func<object[]>{{/code}}((( 76 +C# Expression tree: object array to Expression.New() parameters 76 76 [[https:~~/~~/stackoverflow.com/questions/67968927/c-sharp-expression-tree-object-array-to-expression-new-parameters>>https://stackoverflow.com/questions/67968927/c-sharp-expression-tree-object-array-to-expression-new-parameters]] 78 +))) 77 77 |{{code language="c#"}}public delegate object? MethodDelegate(object instance, object[]? Args); 78 78 79 79 public static MethodDelegate GetMethodWithArgsDelegate( ... ... @@ -80,53 +80,53 @@ 80 80 MethodInfo methodInfo, 81 81 Type instanceType) 82 82 { 83 -ParameterExpression instanceParameter = Expression.Parameter(typeof(object)); 84 -ParameterExpression methodParameters = Expression.Parameter(typeof(object?[])); 85 - 86 -Expression instanceExp; 87 -Expression[] parameterExpressions; 88 -{ 89 - instanceExp = Expression.Convert(instanceParameter, p.instanceType); 90 - 91 - ParameterInfo[] parametersInfos = p.methodInfo.GetParameters(); 92 - parameterExpressions = new Expression[parametersInfos.Length]; 93 - 94 - for (int i = 0; i < parametersInfos.Length; i++) 95 - { 96 - ConstantExpression ithIndex = Expression.Constant(i); 97 - BinaryExpression ithParameter = Expression.ArrayIndex( 98 - methodParameters, 99 - ithIndex); 100 - UnaryExpression unboxedIthParameter = Expression.Convert( 101 - ithParameter, 102 - parametersInfos[i].ParameterType 103 - ); 104 - parameterExpressions[i] = unboxedIthParameter; 105 - } 106 -} 107 - 108 -var callExpression = Expression.Call( 109 - instanceExp, 110 - p.methodInfo, 111 - parameterExpressions 85 + ParameterExpression instanceParameter = Expression.Parameter(typeof(object)); 86 + ParameterExpression methodParameters = Expression.Parameter(typeof(object?[])); 87 + 88 + Expression instanceExp; 89 + Expression[] parameterExpressions; 90 + { 91 + instanceExp = Expression.Convert(instanceParameter, instanceType); 92 + 93 + ParameterInfo[] parametersInfos = methodInfo.GetParameters(); 94 + parameterExpressions = new Expression[parametersInfos.Length]; 95 + 96 + for (int i = 0; i < parametersInfos.Length; i++) 97 + { 98 + ConstantExpression ithIndex = Expression.Constant(i); 99 + BinaryExpression ithParameter = Expression.ArrayIndex( 100 + methodParameters, 101 + ithIndex); 102 + UnaryExpression unboxedIthParameter = Expression.Convert( 103 + ithParameter, 104 + parametersInfos[i].ParameterType 112 112 ); 106 + parameterExpressions[i] = unboxedIthParameter; 107 + } 108 + } 109 + 110 + var callExpression = Expression.Call( 111 + instanceExp, 112 + methodInfo, 113 + parameterExpressions 114 + ); 115 + 116 + var convertResultExp = Expression.Convert( 117 + callExpression, 118 + typeof(object) 119 + ); 120 + 121 + var callHandler = Expression 122 + .Lambda<MethodDelegate>( 123 + convertResultExp, 124 + instanceParameter, 125 + methodParameters 126 + ) 127 + .Compile(); 128 + 129 + return callHandler; 130 +}{{/code}}|{{code language="c#"}}object? Func<object, object[]>{{/code}} 113 113 114 -var convertResultExp = Expression.Convert( 115 - callExpression, 116 - typeof(object) 117 - ); 118 - 119 -var callHandler = Expression 120 - .Lambda<MethodDelegate>( 121 - convertResultExp, 122 - instanceParameter, 123 - methodParameters 124 - ) 125 - .Compile(); 126 - 127 -return callHandler; 128 -}{{/code}}| 129 - 130 130 131 131 ))) 132 132 |(% style="width:394px" %)[[Generic enum to int>>doc:.Generic enum to int.WebHome]]|(% style="width:1090px" %)