Add ExpressionMethod Generator

NuGet/PackLocal.cmd

@@ -1,4 +1,4 @@
-ECHO OFF
+@ECHO OFF
 
 SET VERSION=%1
 SET SNUPKG=%2

NuGet/linq2db.nuspec

@@ -33,8 +33,13 @@
 	</metadata>
 
 	<files>
+		<!-- Primary reference files -->
 		<file src="..\Source\LinqToDB\bin\Release\**\linq2db.pdb" target="lib\" />
 		<file src="..\Source\LinqToDB\bin\Release\**\linq2db.xml" target="lib\" />
 		<file src="..\Source\LinqToDB\bin\Release\**\linq2db.dll" target="lib\" />
+
+		<!-- Generators -->
+		<file src="..\Source\LinqToDB.Analyzers\bin\Release\netstandard2.0\linq2db.Analyzers.dll" 
+		      target="analyzers\dotnet\cs" />
 	</files>
 </package>

Source/LinqToDB.Analyzers/AnalyzerReleases.Shipped.md

@@ -0,0 +1,3 @@
+; Shipped analyzer releases
+; https://github.com/dotnet/roslyn-analyzers/blob/master/src/Microsoft.CodeAnalysis.Analyzers/ReleaseTrackingAnalyzers.Help.md
+

Source/LinqToDB.Analyzers/AnalyzerReleases.Unshipped.md

@@ -0,0 +1,11 @@
+; Unshipped analyzer release
+; https://github.com/dotnet/roslyn-analyzers/blob/master/src/Microsoft.CodeAnalysis.Analyzers/ReleaseTrackingAnalyzers.Help.md
+
+### New Rules
+Rule ID | Category | Severity | Notes
+--------|----------|----------|-------
+LDBGEN001 | LinqToDB.ExpressionMethodGenerator | Error | Diagnostics
+LDBGEN002 | LinqToDB.ExpressionMethodGenerator | Error | Diagnostics
+LDBGEN003 | LinqToDB.ExpressionMethodGenerator | Error | Diagnostics
+LDBGEN004 | LinqToDB.ExpressionMethodGenerator | Warning | Diagnostics
+LDBGEN005 | LinqToDB.ExpressionMethodGenerator | Warning | Diagnostics

Source/LinqToDB.Analyzers/Diagnostics.cs

@@ -0,0 +1,55 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using Microsoft.CodeAnalysis;
+
+namespace LinqToDB.Analyzers
+{
+	internal static class Diagnostics
+	{
+		internal static readonly DiagnosticDescriptor ClassIsNotPartialError =
+			new DiagnosticDescriptor(
+				id: "LDBGEN001",
+				title: "Containing class is not marked 'partial'",
+				messageFormat: "Class '{0}' must be marked partial",
+				category: "LinqToDB.ExpressionMethodGenerator",
+				DiagnosticSeverity.Error,
+				isEnabledByDefault: true);
+
+		internal static readonly DiagnosticDescriptor MethodReturnsVoidError =
+			new DiagnosticDescriptor(
+				id: "LDBGEN002",
+				title: "Method has incorrect return type",
+				messageFormat: "Method '{0}' must not return void",
+				category: "LinqToDB.ExpressionMethodGenerator",
+				DiagnosticSeverity.Error,
+				isEnabledByDefault: true);
+
+		internal static readonly DiagnosticDescriptor MethodHasIncorrectShapeError =
+			new DiagnosticDescriptor(
+				id: "LDBGEN003",
+				title: "Method has too many statements",
+				messageFormat: "Method '{0}' must consist of a single return statement",
+				category: "LinqToDB.ExpressionMethodGenerator",
+				DiagnosticSeverity.Error,
+				isEnabledByDefault: true);
+
+		internal static readonly DiagnosticDescriptor PropertyDoesNotHaveGetWarning =
+			new DiagnosticDescriptor(
+				id: "LDBGEN004",
+				title: "Property does not have a get accessor",
+				messageFormat: "GenerateExpressionMethod applied to property '{0}', but it does not have a get accessor. No expression method will be generated for this property.",
+				category: "LinqToDB.ExpressionMethodGenerator",
+				DiagnosticSeverity.Warning,
+				isEnabledByDefault: true);
+
+		internal static readonly DiagnosticDescriptor MethodNameIsInvalidError =
+			new DiagnosticDescriptor(
+				id: "LDBGEN005",
+				title: "GenerateExpressionMethod Argument 'MethodName' is invalid",
+				messageFormat: "The MethodName argument for the GenerateExpressionMethod attribute must be a simple string",
+				category: "LinqToDB.ExpressionMethodGenerator",
+				DiagnosticSeverity.Warning,
+				isEnabledByDefault: true);
+	}
+}