EmitLdtoken() public method

Emit 'ldtoken' instruction with specified arguments.
public EmitLdtoken ( System target ) : void
target System as target.
return void
TracingILGenerator Class Documentation
Esempio n. 1
0
		private static void EmitNilImplicationForPrimitive( TracingILGenerator il, SerializingMember member, LocalBuilder value, Label endOfDeserialization )
		{
			var endIf = il.DefineLabel( "END_IF_NULL" );
			EmitCompareNull( il, value, endIf );

			switch ( member.Contract.NilImplication )
			{
				case NilImplication.MemberDefault:
				{
					/*
					 * if( value == null )
					 * {
					 *		// Skip current.
					 *		goto END_OF_DESERIALIZATION;
					 * }
					 */
					il.EmitBr( endOfDeserialization );
					break;
				}
				case NilImplication.Null:
				{
					// Throw exception for non-nullable value type.
					// Nop for nullables.
					if ( member.Member.GetMemberValueType().GetIsValueType()
						&& Nullable.GetUnderlyingType( member.Member.GetMemberValueType() ) == null )
					{
						/*
						 * if( value == null )
						 * {
						 *		throw SerializationEceptions.NewValueTypeCannotBeNull( "...", typeof( MEMBER ), typeof( TYPE ) );
						 * }
						 */
						il.EmitLdstr( member.Contract.Name );
						il.EmitLdtoken( member.Member.GetMemberValueType() );
						il.EmitAnyCall( Metadata._Type.GetTypeFromHandle );
						il.EmitLdtoken( member.Member.DeclaringType );
						il.EmitAnyCall( Metadata._Type.GetTypeFromHandle );
						il.EmitAnyCall( SerializationExceptions.NewValueTypeCannotBeNull3Method );
						il.EmitThrow();
					}

					break;
				}
				case NilImplication.Prohibit:
				{
					/*
					 * if( value == null )
					 * {
					 *		throw SerializationEceptions.NewProhibitNullException( "..." );
					 * }
					 */
					il.EmitLdstr( member.Contract.Name );
					il.EmitAnyCall( SerializationExceptions.NewNullIsProhibitedMethod );
					il.EmitThrow();
					break;
				}
			}

			il.MarkLabel( endIf );
		}