CodeExpressionStatement クラスとは何？わかりやすく解説 Weblio辞書

.NET Framework クラスライブラリリファレンス

索引トップ用語の索引ランキング

CodeExpressionStatement クラス

単一の式から成るステートメントを表します。

名前空間: System.CodeDom
アセンブリ: System (system.dll 内)
構文

Visual Basic (宣言)

<SerializableAttribute> _
<ComVisibleAttribute(True)> _
<ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch)> _
Public Class CodeExpressionStatement
    Inherits CodeStatement

Visual Basic (使用法)

Dim instance As CodeExpressionStatement

[SerializableAttribute] 
[ComVisibleAttribute(true)] 
[ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch)] 
public class CodeExpressionStatement : CodeStatement

C++

[SerializableAttribute] 
[ComVisibleAttribute(true)] 
[ClassInterfaceAttribute(ClassInterfaceType::AutoDispatch)] 
public ref class CodeExpressionStatement :
 public CodeStatement

/** @attribute SerializableAttribute() */ 
/** @attribute ComVisibleAttribute(true) */ 
/** @attribute ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch) */ 
public class CodeExpressionStatement extends
 CodeStatement

JScript

SerializableAttribute 
ComVisibleAttribute(true) 
ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch) 
public class CodeExpressionStatement extends
 CodeStatement

解説

CodeExpressionStatement は、単一の式から成るステートメントを表すことができます。

CodeExpressionStatement には単一の CodeExpression が格納されます。またこのクラスは、CodeStatementCollection に複数格納でき、複数の式をスタンドアロンのステートメントとして使用できます。たとえば、CodeExpressionStatement に格納されている CodeMethodInvokeExpression を使用して、戻り値のないメソッド呼び出しを表すことができます。

使用例

Visual Basic

' Creates a code expression for a CodeExpressionStatement to contain.
Dim invokeExpression = New CodeMethodInvokeExpression(
 _
    New CodeTypeReferenceExpression("Console"),
 "Write", _
    New CodePrimitiveExpression("Example string"))

' Creates a statement using a code expression.
Dim expressionStatement As CodeExpressionStatement
expressionStatement = New CodeExpressionStatement(invokeExpression)

' A C# code generator produces the following source code for the preceeding
 example code:
' Console.Write( "Example string" );

// Creates a code expression for a CodeExpressionStatement to contain.
CodeExpression invokeExpression = new CodeMethodInvokeExpression(
 
    new CodeTypeReferenceExpression("Console"), 
    "Write", new CodePrimitiveExpression("Example
 string") );

// Creates a statement using a code expression.
CodeExpressionStatement expressionStatement;
expressionStatement = new CodeExpressionStatement( invokeExpression
 );                        

// A C# code generator produces the following source code for the preceeding
 example code:

// Console.Write( "Example string" );

C++

// Creates a code expression for a CodeExpressionStatement to contain.
array<CodeExpression^>^ temp = {gcnew CodePrimitiveExpression( "Example
 string" )};
CodeExpression^ invokeExpression = gcnew CodeMethodInvokeExpression(
   gcnew CodeTypeReferenceExpression( "Console" ),"Write",temp
 );

// Creates a statement using a code expression.
CodeExpressionStatement^ expressionStatement;
expressionStatement = gcnew CodeExpressionStatement( invokeExpression );

// A C++ code generator produces the following source code for the preceeding
 example code:

// Console::Write( "Example string" );

// Creates a code expression for a CodeExpressionStatement to contain.
CodeExpression invokeExpression = new CodeMethodInvokeExpression(new
 
    CodeTypeReferenceExpression("Console"), "Write",
    new CodeExpression[] { new CodePrimitiveExpression(
    "Example string") });
// Creates a statement using a code expression.
CodeExpressionStatement expressionStatement;
expressionStatement = new CodeExpressionStatement(invokeExpression);
// A VJ# code generator produces the following source code for
// the preceeding example code:
// Console.Write( "Example String" );