port from perforce

intromat/Intromat/Nodes/Code/StringLiteralValue.cs

@@ -0,0 +1,21 @@
+using System.Diagnostics;
+using System.Text;
+using Intromat.Model.Compiler;
+
+namespace Intromat.Nodes.Code
+{
+    public class StringLiteralValue : LiteralValueBase<string?>
+    {
+        public override string? PreviewValue => Value;
+
+        public override void Compile(CompilerContext context, StringBuilder sb)
+        {
+            sb.Append($"\"{Value}\"");
+        }
+
+        public override string Evaluate()
+        {
+            return Value ?? string.Empty;
+        }
+    }
+}