fix: #219

src/Gridify/Syntax/Lexer.cs

@@ -148,7 +148,7 @@ public SyntaxToken NextToken()
       {
          var start = _position;
 
-         while (char.IsLetterOrDigit(Current) || Current is '_' || Current is '.')
+         while (char.IsLetterOrDigit(Current) || Current is '_' || Current is '.' || Current is '-')
             Next();
 
          var length = _position - start;

test/Gridify.Tests/IssueTests/Issue219Tests.cs

@@ -0,0 +1,17 @@
+using System.Linq;
+using FluentAssertions;
+using Gridify.Syntax;
+using Xunit;
+
+namespace Gridify.Tests.IssueTests;
+
+public class Issue219Tests
+{
+   [Fact]
+   private void FieldNameWithDashShouldWork()
+   {
+      var syntaxTree = SyntaxTree.Parse("property-name = value");
+      syntaxTree.Diagnostics.Should().BeEmpty();
+      syntaxTree.Root.GetChildren().First().Should().BeOfType<FieldExpressionSyntax>();
+   }
+}