From 4f606e0e305661861f1d13acd6a8dd285d6f3cb6 Mon Sep 17 00:00:00 2001
From: Brandon Dyck <brandon@dyck.us>
Date: Wed, 5 Jul 2023 10:23:34 -0600
Subject: [PATCH] Allow arbitrary patterns as func params

---
 AST.cs    |  2 +-
 Parser.cs | 16 ++--------------
 2 files changed, 3 insertions(+), 15 deletions(-)

diff --git a/AST.cs b/AST.cs
index a333cb3..41bd7fe 100644
--- a/AST.cs
+++ b/AST.cs
@@ -54,7 +54,7 @@ public partial record SimplePattern
 
 public abstract record Binding(Expr Value);
 public record VarBinding(Pattern Pattern, Expr Value) : Binding(Value);
-public record FuncBinding(Name Name, SimplePattern[] Params, Expr Value) : Binding(Value)
+public record FuncBinding(Name Name, Pattern[] Params, Expr Value) : Binding(Value)
 {
 	public override string ToString()
 	{
diff --git a/Parser.cs b/Parser.cs
index adefd30..b3ae6af 100644
--- a/Parser.cs
+++ b/Parser.cs
@@ -264,22 +264,10 @@ class Parser
 			switch (p)
 			{
 				case (SimplePattern(var funcName)) when funcName != null && match(TokenType.LParen):
-					List<SimplePattern> funcParams = new List<SimplePattern>();
+					List<Pattern> funcParams = new List<Pattern>();
 					while (!check(TokenType.RParen))
 					{
-						Name? paramName;
-						if (match(TokenType.Blank))
-						{
-							funcParams.Add(new(null));
-						}
-						else if ((paramName = name()) != null)
-						{
-							funcParams.Add(new(paramName));
-						}
-						else
-						{
-							throw error(peek(), "Expect identifier or '_' as function parameter.");
-						}
+						funcParams.Add(pattern());
 						if (!match(TokenType.Comma))
 						{
 							break;