...

src/compiler/Nub.Lang/Program.cs

@@ -1,4 +1,5 @@
 using Nub.Lang.Backend;
+using Nub.Lang.Frontend.Diagnostics;
 using Nub.Lang.Frontend.Lexing;
 using Nub.Lang.Frontend.Parsing;
 using Nub.Lang.Frontend.Typing;
@@ -41,7 +42,20 @@ internal static class Program
             return 1;
         }
 
-        var modules = RunFrontend(input);
+        List<Diagnostic> diagnostics = [];
+        
+        var modules = RunFrontend(input, diagnostics);
+
+        foreach (var diagnostic in diagnostics)
+        {
+            Console.WriteLine(diagnostic.Format());
+        }
+
+        if (diagnostics.Any(d => d.Severity == DiagnosticSeverity.Error))
+        {
+            return 1;
+        }
+        
         var definitions = modules.SelectMany(f => f.Definitions).ToList();
 
         var typeChecker = new TypeChecker(definitions);
@@ -54,14 +68,14 @@ internal static class Program
         return 0;
     }
 
-    private static List<ModuleNode> RunFrontend(string rootFilePath)
+    private static List<ModuleNode> RunFrontend(string rootFilePath, List<Diagnostic> diagnostics)
     {
         List<ModuleNode> modules = [];
-        RunFrontend(rootFilePath, modules);
+        RunFrontend(rootFilePath, modules, diagnostics);
         return modules;
     }
 
-    private static void RunFrontend(string rootFilePath, List<ModuleNode> modules)
+    private static void RunFrontend(string rootFilePath, List<ModuleNode> modules, List<Diagnostic> diagnostics)
     {
         var filePaths = Directory.EnumerateFiles(rootFilePath, "*.nub", SearchOption.TopDirectoryOnly);
 
@@ -73,6 +87,7 @@ internal static class Program
         }
 
         var module = Parser.ParseModule(tokens, rootFilePath);
+        diagnostics.AddRange(Parser.Diagnostics);
         modules.Add(module);
 
         foreach (var import in module.Imports)
@@ -80,7 +95,7 @@ internal static class Program
             var importPath = Path.GetFullPath(import, module.Path);
             if (modules.All(m => m.Path != importPath))
             {
-                RunFrontend(importPath, modules);
+                RunFrontend(importPath, modules, diagnostics);
             }
         }
     }