compiler/Generator.cs

@@ -1,7 +1,5 @@
 using System.Diagnostics;
-using System.Security.Principal;
 using System.Text;
-using Microsoft.VisualBasic;
 
 namespace Compiler;
 
@@ -36,8 +34,24 @@ public class Generator
             writer.WriteLine($$"""
                              int main(int argc, char *argv[])
                              {
-                                return {{entryPoint}}();
+                                struct nub_dynamic_array_52747d8c11b7118c args = (struct nub_dynamic_array_52747d8c11b7118c){0};
+
+                                for (int i = 0; i < argc; ++i)
+                                {
+                                    auto nubstring = nub_core_string_from_cstr(argv[i]);
+                                    da_append(&args, nubstring);
                                 }
+
+                                int returnValue = {{entryPoint}}(args);
+
+                                for (int i = 0; i < args.count; ++i)
+                                {
+                                    nub_core_string_rc_dec(args.items[i]);
+                                }
+
+                                return returnValue;
+                             }
+
                              """);
 
             writer.WriteLine();
@@ -104,50 +118,6 @@ public class Generator
                          #include <string.h>
                          #include <stdio.h>
 
-                         """);
-
-        while (referencedTypes.Count != 0)
-        {
-            var type = referencedTypes.ElementAt(0);
-            EmitTypeDefinitionIfNotEmitted(type);
-            referencedTypes.Remove(type);
-        }
-
-        foreach (var (name, value) in referencedStringLiterals)
-        {
-            writer.WriteLine
-            (
-                $$"""
-                static struct nub_core_string {{name}} = {
-                    .data = "{{value}}",
-                    .length = {{value.Length}},
-                    .ref = 0,
-                    .flags = FLAG_STRING_LITERAL
-                };
-
-                """
-            );
-        }
-
-        var header = writer.ToString();
-
-        return $"{header}\n{declarations}\n{implementations}";
-    }
-
-    private void EmitTypeDefinitionIfNotEmitted(NubType type)
-    {
-        if (emittedTypes.Contains(type))
-            return;
-
-        emittedTypes.Add(type);
-
-        switch (type)
-        {
-            case NubTypeString:
-            {
-                writer.WriteLine
-                (
-                    """
                          #define FLAG_STRING_LITERAL 1
                          #define STRING_DEBUG 1
 
@@ -276,9 +246,69 @@ public class Generator
                              return result;
                          }
 
+                         #define da_append(xs, x)                                                             \
+                             do {                                                                             \
+                                 if ((xs)->count >= (xs)->capacity) {                                         \
+                                     if ((xs)->capacity == 0) (xs)->capacity = 256;                           \
+                                     else (xs)->capacity *= 2;                                                \
+                                     (xs)->items = realloc((xs)->items, (xs)->capacity*sizeof(*(xs)->items)); \
+                                 }                                                                            \
+                                 (xs)->items[(xs)->count++] = (x);                                            \
+                             } while (0)
+                         """);
+
+        while (referencedTypes.Count != 0)
+        {
+            var type = referencedTypes.ElementAt(0);
+            EmitTypeDefinitionIfNotEmitted(type);
+            referencedTypes.Remove(type);
+        }
+
+        foreach (var (name, value) in referencedStringLiterals)
+        {
+            writer.WriteLine
+            (
+                $$"""
+                static struct nub_core_string {{name}} = {
+                    .data = "{{value}}",
+                    .length = {{value.Length}},
+                    .ref = 0,
+                    .flags = FLAG_STRING_LITERAL
+                };
+
                 """
             );
+        }
 
+        var header = writer.ToString();
+
+        return $"{header}\n{declarations}\n{implementations}";
+    }
+
+    private void EmitTypeDefinitionIfNotEmitted(NubType type)
+    {
+        if (emittedTypes.Contains(type))
+            return;
+
+        emittedTypes.Add(type);
+
+        switch (type)
+        {
+            case NubTypeArray arrayType:
+                {
+                    var name = NameMangler.Mangle("dynamic", "array", arrayType);
+
+                    writer.WriteLine
+                    (
+                    $$"""
+                    struct {{name}}
+                    {
+                        size_t count;
+                        size_t capacity;
+                        {{CType(arrayType.ElementType)}} *items;
+                    };
+                    """
+                    );
                     break;
                 }
             case NubTypeStruct structType:
@@ -563,6 +593,8 @@ public class Generator
             TypedNodeExpressionStructMemberAccess expression => EmitExpressionMemberAccess(expression),
             TypedNodeExpressionStringLength expression => EmitExpressionStringLength(expression),
             TypedNodeExpressionStringPointer expression => EmitExpressionStringPointer(expression),
+            TypedNodeExpressionArrayCount expression => EmitExpressionArrayCount(expression),
+            TypedNodeExpressionArrayPointer expression => EmitExpressionArrayPointer(expression),
             TypedNodeExpressionLocalIdent expression => expression.Name,
             TypedNodeExpressionGlobalIdent expression => EmitNodeExpressionGlobalIdent(expression),
             TypedNodeExpressionFuncCall expression => EmitExpressionFuncCall(expression),
@@ -712,6 +744,18 @@ public class Generator
         return $"{target}->data";
     }
 
+    private string EmitExpressionArrayCount(TypedNodeExpressionArrayCount expression)
+    {
+        var target = EmitExpression(expression.Target);
+        return $"{target}.count";
+    }
+
+    private string EmitExpressionArrayPointer(TypedNodeExpressionArrayPointer expression)
+    {
+        var target = EmitExpression(expression.Target);
+        return $"{target}.items";
+    }
+
     private string EmitNodeExpressionGlobalIdent(TypedNodeExpressionGlobalIdent expression)
     {
         if (!moduleGraph.TryResolveIdentifier(expression.Module, expression.Name, true, out var info))
@@ -747,6 +791,7 @@ public class Generator
             NubTypePointer type => CType(type.To) + (varName != null ? $" *{varName}" : "*"),
             NubTypeString type => "struct nub_core_string" + (varName != null ? $" *{varName}" : "*"),
             NubTypeFunc type => $"{CType(type.ReturnType)} (*{varName})({string.Join(", ", type.Parameters.Select(p => CType(p)))})",
+            NubTypeArray type => $"struct {NameMangler.Mangle("dynamic", "array", type)}" + (varName != null ? $" {varName}" : ""),
             _ => throw new ArgumentOutOfRangeException(nameof(node), node, null)
         };
     }

compiler/ModuleGraph.cs

@@ -211,6 +211,7 @@ public class ModuleGraph
                     NodeTypeUInt type => NubTypeUInt.Get(type.Width),
                     NodeTypeString => NubTypeString.Instance,
                     NodeTypeVoid => NubTypeVoid.Instance,
+                    NodeTypeArray type => NubTypeArray.Get(ResolveType(type.ElementType, currentModule)),
                     _ => throw new ArgumentOutOfRangeException(nameof(node))
                 };
             }

compiler/NubType.cs

@@ -256,6 +256,28 @@ public class NubTypeFunc : NubType
     private record Signature(IReadOnlyList<NubType> Parameters, NubType ReturnType);
 }
 
+public class NubTypeArray : NubType
+{
+    private static readonly Dictionary<NubType, NubTypeArray> Cache = new();
+
+    public static NubTypeArray Get(NubType to)
+    {
+        if (!Cache.TryGetValue(to, out var ptr))
+            Cache[to] = ptr = new NubTypeArray(to);
+
+        return ptr;
+    }
+
+    public NubType ElementType { get; }
+
+    private NubTypeArray(NubType elementType)
+    {
+        ElementType = elementType;
+    }
+
+    public override string ToString() => $"[]{ElementType}";
+}
+
 public class TypeEncoder
 {
     public static string Encode(NubType type)
@@ -355,6 +377,12 @@ public class TypeEncoder
                 sb.Append(')');
                 break;
 
+            case NubTypeArray a:
+                sb.Append("A(");
+                EncodeType(sb, a.ElementType);
+                sb.Append(')');
+                break;
+
             default:
                 throw new NotSupportedException(type.GetType().Name);
         }
@@ -396,6 +424,7 @@ public class TypeDecoder
             'F' => DecodeFunc(),
             'T' => DecodeStruct(),
             'E' => DecodeEnum(),
+            'A' => DecodeArray(),
             _ => throw new Exception($"'{start}' is not a valid start to a type")
         };
     }
@@ -531,6 +560,14 @@ public class TypeDecoder
         throw new Exception($"Expected 'V' or 'N'");
     }
 
+    private NubTypeArray DecodeArray()
+    {
+        Expect('(');
+        var elementType = DecodeType();
+        Expect(')');
+        return NubTypeArray.Get(elementType);
+    }
+
     private bool TryPeek(out char c)
     {
         if (index >= encoded.Length)

compiler/Parser.cs

@@ -524,6 +524,13 @@ public class Parser
             return new NodeTypeAnonymousStruct(TokensFrom(startIndex), fields);
         }
 
+        if (TryExpectSymbol(Symbol.OpenSquare))
+        {
+            ExpectSymbol(Symbol.CloseSquare);
+            var elementType = ParseType();
+            return new NodeTypeArray(TokensFrom(startIndex), elementType);
+        }
+
         if (TryExpectIdent(out var ident))
         {
             switch (ident.Ident)
@@ -1035,6 +1042,11 @@ public class NodeTypeAnonymousStruct(List<Token> tokens, List<NodeTypeAnonymousS
     }
 }
 
+public class NodeTypeArray(List<Token> tokens, NodeType elementType) : NodeType(tokens)
+{
+    public NodeType ElementType { get; } = elementType;
+}
+
 public class NodeTypePointer(List<Token> tokens, NodeType to) : NodeType(tokens)
 {
     public NodeType To { get; } = to;

compiler/Program.cs

@@ -144,9 +144,15 @@ if (!compileLib)
         return 1;
     }
 
-    if (entryPointType.Parameters.Any())
+    if (entryPointType.Parameters.Count != 1)
     {
-        DiagnosticFormatter.Print(Diagnostic.Error($"Entrypoint must not take any parameters").Build(), Console.Error);
+        DiagnosticFormatter.Print(Diagnostic.Error($"Entrypoint must take exaxtly one parameter").Build(), Console.Error);
+        return 1;
+    }
+
+    if (entryPointType.Parameters[0] is not NubTypeArray { ElementType: NubTypeString })
+    {
+        DiagnosticFormatter.Print(Diagnostic.Error($"First parameter of entrypoint must be a string array").Build(), Console.Error);
         return 1;
     }
 

compiler/Tokenizer.cs

@@ -203,6 +203,16 @@ public class Tokenizer
                     Consume();
                     return new TokenSymbol(line, startColumn, column - startColumn, Symbol.CloseCurly);
                 }
+            case '[':
+                {
+                    Consume();
+                    return new TokenSymbol(line, startColumn, column - startColumn, Symbol.OpenSquare);
+                }
+            case ']':
+                {
+                    Consume();
+                    return new TokenSymbol(line, startColumn, column - startColumn, Symbol.CloseSquare);
+                }
             case '(':
                 {
                     Consume();
@@ -497,6 +507,8 @@ public enum Symbol
     CloseCurly,
     OpenParen,
     CloseParen,
+    OpenSquare,
+    CloseSquare,
     Comma,
     Period,
     Colon,
@@ -566,6 +578,8 @@ public static class TokenExtensions
             Symbol.CloseCurly => "}",
             Symbol.OpenParen => "(",
             Symbol.CloseParen => ")",
+            Symbol.OpenSquare => "[",
+            Symbol.CloseSquare => "]",
             Symbol.Comma => ",",
             Symbol.Period => ".",
             Symbol.Colon => ":",

compiler/TypeChecker.cs

@@ -478,7 +478,19 @@ public class TypeChecker
                         case "ptr":
                             return new TypedNodeExpressionStringPointer(expression.Tokens, NubTypePointer.Get(NubTypeUInt.Get(8)), target);
                         default:
-                        throw BasicError($"'{expression.Name.Ident}' is not a member of type string", expression.Name);
+                            throw BasicError($"'{expression.Name.Ident}' is not a member of type {stringType}", expression.Name);
+                    }
+                }
+            case NubTypeArray arrayType:
+                {
+                    switch (expression.Name.Ident)
+                    {
+                        case "count":
+                            return new TypedNodeExpressionArrayCount(expression.Tokens, NubTypeUInt.Get(64), target);
+                        case "ptr":
+                            return new TypedNodeExpressionArrayPointer(expression.Tokens, NubTypePointer.Get(arrayType.ElementType), target);
+                        default:
+                            throw BasicError($"'{expression.Name.Ident}' is not a member of type {arrayType}", expression.Name);
                     }
                 }
             case NubTypeStruct structType:
@@ -676,6 +688,7 @@ public class TypeChecker
             NodeTypeUInt type => NubTypeUInt.Get(type.Width),
             NodeTypeString => NubTypeString.Instance,
             NodeTypeVoid => NubTypeVoid.Instance,
+            NodeTypeArray type => NubTypeArray.Get(ResolveType(type.ElementType)),
             _ => throw new ArgumentOutOfRangeException(nameof(node))
         };
     }
@@ -965,6 +978,16 @@ public class TypedNodeExpressionStringPointer(List<Token> tokens, NubType type,
     public TypedNodeExpression Target { get; } = target;
 }
 
+public class TypedNodeExpressionArrayCount(List<Token> tokens, NubType type, TypedNodeExpression target) : TypedNodeExpression(tokens, type)
+{
+    public TypedNodeExpression Target { get; } = target;
+}
+
+public class TypedNodeExpressionArrayPointer(List<Token> tokens, NubType type, TypedNodeExpression target) : TypedNodeExpression(tokens, type)
+{
+    public TypedNodeExpression Target { get; } = target;
+}
+
 public class TypedNodeExpressionFuncCall(List<Token> tokens, NubType type, TypedNodeExpression target, List<TypedNodeExpression> parameters) : TypedNodeExpression(tokens, type)
 {
     public TypedNodeExpression Target { get; } = target;

examples/program/main.nub

@@ -10,25 +10,12 @@ enum Message {
     Say: string
 }
 
-func main(): i32 {
+func main(args: []string): i32 {
-    core::println("Hello, world!")
+    let i = 0
-    core::println("Hello" + "World")
+    while i < args.count {
-
+        // core::print(args[i])
-    let message = getMessage()
+        i = i + 1
-
-    let newStr = new string("cstring".ptr)
-
-    core::println(newStr)
-
-    match message {
-        Quit {
-            core::println("quit")
     }
-        Say msg {
-            core::println(msg)
-        } 
-    }
-
     return 0
 }