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src/Syntax/Parsing/Definitions/FuncDefinitionNode.cs

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+using common;
+using syntax.Parsing.Statements;
+using syntax.Tokenization;
+using syntax.Typing;
+
+namespace syntax.Parsing.Definitions;
+
+public class FuncParameter(string name, NubType type)
+{
+    public string Name { get; } = name;
+    public NubType Type { get; } = type;
+
+    public override string ToString() => $"{Name}: {Type}";
+}
+
+public interface IFuncSignature
+{
+    public string Name { get; }
+    public List<FuncParameter> Parameters { get; }
+    public NubType ReturnType { get; }
+
+    public string ToString() => $"{Name}({string.Join(", ", Parameters.Select(p => p.ToString()))}){": " + ReturnType}";
+}
+
+public class LocalFuncDefinitionNode(IReadOnlyList<Token> tokens, Optional<string> documentation, string @namespace, string name, List<FuncParameter> parameters, BlockNode body, NubType returnType, bool exported) : DefinitionNode(tokens, documentation, @namespace), IFuncSignature
+{
+    public string Name { get; } = name;
+    public List<FuncParameter> Parameters { get; } = parameters;
+    public BlockNode Body { get; } = body;
+    public NubType ReturnType { get; } = returnType;
+    public bool Exported { get; } = exported;
+
+    public override string ToString() => $"{Name}({string.Join(", ", Parameters.Select(p => p.ToString()))}){": " + ReturnType}";
+}
+
+public class ExternFuncDefinitionNode(IReadOnlyList<Token> tokens, Optional<string> documentation, string @namespace, string name, string callName, List<FuncParameter> parameters, NubType returnType) : DefinitionNode(tokens, documentation, @namespace), IFuncSignature
+{
+    public string Name { get; } = name;
+    public string CallName { get; } = callName;
+    public List<FuncParameter> Parameters { get; } = parameters;
+    public NubType ReturnType { get; } = returnType;
+
+    public override string ToString() => $"{Name}({string.Join(", ", Parameters.Select(p => p.ToString()))}){": " + ReturnType}";
+}