...

src/compiler/Nub.Lang/Program.cs

@@ -1,4 +1,6 @@
-using Nub.Lang.Backend;
+using System.Diagnostics.CodeAnalysis;
+using Nub.Lang.Backend;
+using Nub.Lang.Frontend;
 using Nub.Lang.Frontend.Diagnostics;
 using Nub.Lang.Frontend.Lexing;
 using Nub.Lang.Frontend.Parsing;
@@ -42,22 +44,7 @@ internal static class Program
             return 1;
         }
 
-        List<ModuleNode> modules;
+        if (TryRunFrontend(input, out var definitions))
-        try
-        {
-            modules = RunFrontend(input);
-        }
-        catch (Exception)
-        {
-            return 1;
-        }
-
-        var definitions = modules.SelectMany(f => f.Definitions).ToList();
-
-        var typeChecker = new TypeChecker(definitions);
-        var typeCheckResult = typeChecker.TypeCheck();
-        typeCheckResult.PrintAllDiagnostics();
-        if (typeCheckResult.HasErrors)
         {
             return 1;
         }
@@ -69,15 +56,22 @@ internal static class Program
         return 0;
     }
 
-    private static List<ModuleNode> RunFrontend(string rootFilePath)
+    private static bool TryRunFrontend(string rootFilePath, out List<DefinitionNode> definitions)
     {
         List<ModuleNode> modules = [];
-        RunFrontend(rootFilePath, modules);
+        var error = TryRunFrontend(rootFilePath, modules);
-        return modules;
+        definitions = modules.SelectMany(f => f.Definitions).ToList();
+        
+        var typeChecker = new TypeChecker(definitions);
+        var typeCheckResult = typeChecker.TypeCheck();
+        typeCheckResult.PrintAllDiagnostics();
+        error = error || typeCheckResult.HasErrors;
+        return error;
     }
 
-    private static void RunFrontend(string rootFilePath, List<ModuleNode> modules)
+    private static bool TryRunFrontend(string rootFilePath, List<ModuleNode> modules)
     {
+        var error = false;
         var filePaths = Directory.EnumerateFiles(rootFilePath, "*.nub", SearchOption.TopDirectoryOnly);
 
         List<Token> tokens = [];
@@ -89,10 +83,6 @@ internal static class Program
 
         var parseResult = Parser.ParseModule(tokens, rootFilePath);
         parseResult.PrintAllDiagnostics();
-        if (parseResult.HasErrors)
-        {
-            throw new Exception();
-        }
 
         modules.Add(parseResult.Value);
 
@@ -101,8 +91,13 @@ internal static class Program
             var importPath = Path.GetFullPath(import, parseResult.Value.Path);
             if (modules.All(m => m.Path != importPath))
             {
-                RunFrontend(importPath, modules);
+                if (!TryRunFrontend(importPath, modules))
+                {
+                    error = true;
+                }
             }
         }
+
+        return error;
     }
 }