EmitNewarr() public method

Emit array initialization code with initializer. Post condition is evaluation stack will no be modified as previous state. Note that initialized array is not placed on the top of evaluation stack.
public EmitNewarr ( Action arrayLoadingEmitter, Action arrayStoringEmitter, Type elementType ) : void
arrayLoadingEmitter Action /// Delegate to emittion of array loading instruction. /// 1st argument is this instance. /// Post condition is that exactly one target array will be added on the top of stack and element type is . ///
arrayStoringEmitter Action /// Delegate to emittion of array storing instruction. /// 1st argument is this instance. /// Pre condition is that the top of evaluation stack is array type and its element type is . /// Post condition is that exactly one target array will be removed from the top of stack. ///
elementType Type of array element. This can be generaic parameter.
return void
TracingILGenerator Class Documentation
Ejemplo n.º 1
0
		public static void EmitConstruction( TracingILGenerator il, LocalBuilder target, Action<TracingILGenerator> initialCountLoadingEmitter )
		{
			Contract.Requires( il != null );
			Contract.Requires( target != null );
			Contract.Requires( initialCountLoadingEmitter != null );

			// TODO: For collection, supports .ctor(IEnumerable<> other)

			if ( target.LocalType.IsArray )
			{
				initialCountLoadingEmitter( il );
				il.EmitNewarr( target.LocalType.GetElementType() );
				il.EmitAnyStloc( target );
				return;
			}

			ConstructorInfo ctor = target.LocalType.GetConstructor( _ctor_Int32_ParameterTypes );
			if ( ctor != null && initialCountLoadingEmitter != null && typeof( IEnumerable ).IsAssignableFrom( target.LocalType ) )
			{
				if ( target.LocalType.IsValueType )
				{
					// Same as general method call
					var capacity = il.DeclareLocal( typeof( int ), "capacity" );
					initialCountLoadingEmitter( il );
					il.EmitAnyStloc( capacity );
					il.EmitAnyLdloca( target );
					il.EmitAnyLdloc( capacity );
					il.EmitCallConstructor( ctor );
				}
				else
				{
					initialCountLoadingEmitter( il );
					il.EmitNewobj( ctor );
					il.EmitAnyStloc( target );
				}
				return;
			}

			if ( target.LocalType.IsValueType )
			{
				// ValueType instance has been initialized by the runtime.
				return;
			}

			ctor = target.LocalType.GetConstructor( Type.EmptyTypes );
			if ( ctor == null )
			{
				throw SerializationExceptions.NewTargetDoesNotHavePublicDefaultConstructorNorInitialCapacity( target.LocalType );
			}

			il.EmitNewobj( ctor );
			il.EmitAnyStloc( target );
		}