From be53431904b3040af0acb73467473f0778d83709 Mon Sep 17 00:00:00 2001
From: Alejandro Mery <amery@jpi.io>
Date: Sun, 4 Jul 2021 03:02:43 +0100
Subject: [PATCH] lexer: to simplify states, Lexer.EmitError() assumes EOF if
 nil is passed

Signed-off-by: Alejandro Mery <amery@jpi.io>
---
 lexer/lexer.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lexer/lexer.go b/lexer/lexer.go
index e9bad1c..9ebe147 100644
--- a/lexer/lexer.go
+++ b/lexer/lexer.go
@@ -101,6 +101,11 @@ func (lex *lexer) Emit(typ TokenType) {
 }
 
 func (lex *lexer) EmitError(err error) {
+	// if no error is passed, assume they mean EOF
+	if err == nil {
+		err = EOF
+	}
+
 	lex.tokens <- NewErrorToken(err, lex.pos)
 }