From 772686a2fc605023bce370e52dd5746d5c306367 Mon Sep 17 00:00:00 2001
From: Robert Bendun <robben@st.amu.edu.pl>
Date: Mon, 20 Jun 2022 13:21:37 +0200
Subject: [PATCH] Better error reporting of not mached parens

---
 src/errors.cc |  6 ++++--
 src/parser.cc | 15 +++++++++++++--
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/src/errors.cc b/src/errors.cc
index 743644d..04cb52f 100644
--- a/src/errors.cc
+++ b/src/errors.cc
@@ -185,8 +185,10 @@ std::ostream& operator<<(std::ostream& os, Error const& err)
 
 			Lines::the.print(os, std::string(loc->filename), loc->line, loc->line);
 
-			os << pretty::begin_comment << "\nThis error is considered an internal one. It should not be displayed to the end user.\n" << pretty::end;
-			encourage_contact(os);
+			os << pretty::begin_comment << "\nThis error is considered an internal one. It should not be displayed to the end user.\n";
+			os << "\n";
+			os << "This error message is temporary and will be replaced by better one in the future\n";
+			os << pretty::end;
 		},
 
 		[&](errors::Expected_Expression_Separator_Before const& err) {
diff --git a/src/parser.cc b/src/parser.cc
index 5212fc7..5dfe760 100644
--- a/src/parser.cc
+++ b/src/parser.cc
@@ -271,7 +271,10 @@ Result<Ast> Parser::parse_atomic_expression()
 							}
 						}
 					}
-					unimplemented("Don't know why it stopped, maybe end of file?");
+					return Error {
+						.details = errors::Unexpected_Empty_Source {},
+						.location = {}
+					};
 				}
 				consume();
 				if (is_lambda) {
@@ -287,7 +290,15 @@ Result<Ast> Parser::parse_atomic_expression()
 			consume();
 			auto ast = Try(parse_sequence());
 			if (not expect(Token::Type::Close_Paren)) {
-				unimplemented("Error handling of this code is not implemented yet");
+				auto const& token = Try(peek());
+				return Error {
+					.details = errors::internal::Unexpected_Token {
+						.type = type_name(token.type),
+						.source = token.source,
+						.when = "waiting for closing paren ')'"
+					},
+					.location = token.location
+				};
 			}
 			consume();
 			return ast;