From 6c12b199e85f6b52778b5433fba3c64af8b5a986 Mon Sep 17 00:00:00 2001
From: Riyyi <riyyi3@gmail.com>
Date: Fri, 24 Mar 2023 23:30:22 +0100
Subject: [PATCH] Eval: Add error message for invalid function calls

---
 src/eval.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/eval.cpp b/src/eval.cpp
index 23bd708..97e5430 100644
--- a/src/eval.cpp
+++ b/src/eval.cpp
@@ -42,7 +42,7 @@ ASTNode* Eval::evalAst(ASTNode* ast, Environment* env)
 	if (is<Symbol>(ast)) {
 		auto result = env->lookup(static_cast<Symbol*>(ast)->symbol());
 		if (!result) {
-			Error::the().addError(format("'{}' not found", ast));
+			Error::the().addError(format("symbol’s function definition is void: {}", ast));
 		}
 		return result;
 	}
@@ -79,6 +79,7 @@ ASTNode* Eval::apply(List* evaluated_list)
 	auto nodes = evaluated_list->nodes();
 
 	if (!is<Function>(nodes[0])) {
+		Error::the().addError(format("invalid function: {}", nodes[0]));
 		return nullptr;
 	}