From b9c4783273bfe794a6be2be6b02aedcd9bd80d64 Mon Sep 17 00:00:00 2001
From: Damien George <damien.p.george@gmail.com>
Date: Thu, 22 Dec 2016 10:37:13 +1100
Subject: [PATCH] py/lexer: Remove unreachable code in string tokeniser.

---
 py/lexer.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/py/lexer.c b/py/lexer.c
index 7db49de895..0611a727b9 100644
--- a/py/lexer.c
+++ b/py/lexer.c
@@ -430,7 +430,8 @@ STATIC void mp_lexer_next_token_into(mp_lexer_t *lex, bool first_token) {
                         vstr_add_char(&lex->vstr, '\\');
                     } else {
                         switch (c) {
-                            case MP_LEXER_EOF: break; // TODO a proper error message?
+                            // note: "c" can never be MP_LEXER_EOF because next_char
+                            // always inserts a newline at the end of the input stream
                             case '\n': c = MP_LEXER_EOF; break; // backslash escape the newline, just ignore it
                             case '\\': break;
                             case '\'': break;