Refactor (#94)

CliFx.Analyzers/AnalyzerBase.cs

@@ -0,0 +1,40 @@
+using System.Collections.Immutable;
+using CliFx.Analyzers.Utils.Extensions;
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.Diagnostics;
+
+namespace CliFx.Analyzers
+{
+    public abstract class AnalyzerBase : DiagnosticAnalyzer
+    {
+        public DiagnosticDescriptor SupportedDiagnostic { get; }
+
+        public sealed override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics { get; }
+
+        protected AnalyzerBase(
+            string diagnosticTitle,
+            string diagnosticMessage,
+            DiagnosticSeverity diagnosticSeverity = DiagnosticSeverity.Error)
+        {
+            SupportedDiagnostic = new DiagnosticDescriptor(
+                "CliFx_" + GetType().Name.TrimEnd("Analyzer"),
+                diagnosticTitle,
+                diagnosticMessage,
+                "CliFx",
+                diagnosticSeverity,
+                true
+            );
+
+            SupportedDiagnostics = ImmutableArray.Create(SupportedDiagnostic);
+        }
+
+        protected Diagnostic CreateDiagnostic(Location location) =>
+            Diagnostic.Create(SupportedDiagnostic, location);
+
+        public override void Initialize(AnalysisContext context)
+        {
+            context.EnableConcurrentExecution();
+            context.ConfigureGeneratedCodeAnalysis(GeneratedCodeAnalysisFlags.None);
+        }
+    }
+}