From 2a1cd4fda8a4a8e649910d16b4dfa1ce7ae63543 Mon Sep 17 00:00:00 2001
From: chai <215380520@qq.com>
Date: Fri, 12 May 2023 09:24:40 +0800
Subject: *misc

---
 .../Expressions/PrimitiveRecordCreator.cs          | 49 ++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 ThirdParty/CsvHelper-master/src/CsvHelper/Expressions/PrimitiveRecordCreator.cs

(limited to 'ThirdParty/CsvHelper-master/src/CsvHelper/Expressions/PrimitiveRecordCreator.cs')

diff --git a/ThirdParty/CsvHelper-master/src/CsvHelper/Expressions/PrimitiveRecordCreator.cs b/ThirdParty/CsvHelper-master/src/CsvHelper/Expressions/PrimitiveRecordCreator.cs
new file mode 100644
index 0000000..3e1cfd0
--- /dev/null
+++ b/ThirdParty/CsvHelper-master/src/CsvHelper/Expressions/PrimitiveRecordCreator.cs
@@ -0,0 +1,49 @@
+// Copyright 2009-2022 Josh Close
+// This file is a part of CsvHelper and is dual licensed under MS-PL and Apache 2.0.
+// See LICENSE.txt for details or visit http://www.opensource.org/licenses/ms-pl.html for MS-PL and http://opensource.org/licenses/Apache-2.0 for Apache 2.0.
+// https://github.com/JoshClose/CsvHelper
+using CsvHelper.Configuration;
+using CsvHelper.TypeConversion;
+using System;
+using System.Linq.Expressions;
+
+namespace CsvHelper.Expressions
+{
+	/// <summary>
+	/// Creates primitive records.
+	/// </summary>
+	public class PrimitiveRecordCreator : RecordCreator
+	{
+		/// <summary>
+		/// Initializes a new instance using the given reader.
+		/// </summary>
+		/// <param name="reader">The reader.</param>
+		public PrimitiveRecordCreator(CsvReader reader) : base(reader) { }
+
+		/// <summary>
+		/// Creates a <see cref="Delegate"/> of type <see cref="Func{T}"/>
+		/// that will create a record of the given type using the current
+		/// reader row.
+		/// </summary>
+		/// <param name="recordType">The record type.</param>
+		protected override Delegate CreateCreateRecordDelegate(Type recordType)
+		{
+			var method = typeof(IReaderRow).GetProperty("Item", typeof(string), new[] { typeof(int) }).GetGetMethod();
+			Expression fieldExpression = Expression.Call(Expression.Constant(Reader), method, Expression.Constant(0, typeof(int)));
+
+			var memberMapData = new MemberMapData(null)
+			{
+				Index = 0,
+				TypeConverter = Reader.Context.TypeConverterCache.GetConverter(recordType)
+			};
+			memberMapData.TypeConverterOptions = TypeConverterOptions.Merge(new TypeConverterOptions { CultureInfo = Reader.Configuration.CultureInfo }, Reader.Context.TypeConverterOptionsCache.GetOptions(recordType));
+
+			fieldExpression = Expression.Call(Expression.Constant(memberMapData.TypeConverter), "ConvertFromString", null, fieldExpression, Expression.Constant(Reader), Expression.Constant(memberMapData));
+			fieldExpression = Expression.Convert(fieldExpression, recordType);
+
+			var funcType = typeof(Func<>).MakeGenericType(recordType);
+
+			return Expression.Lambda(funcType, fieldExpression).Compile();
+		}
+	}
+}
-- 
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