From 46cf157ad8a9665cb943350e02cd1c6371925ca9 Mon Sep 17 00:00:00 2001
From: Max Brunsfeld <maxbrunsfeld@gmail.com>
Date: Thu, 18 Oct 2018 11:12:43 -0700
Subject: [PATCH] Handle escaped expansions in heredocs

Fixes #28
---
 corpus/commands.txt | 12 ++++++++++++
 src/scanner.cc      |  7 +++++++
 2 files changed, 19 insertions(+)

diff --git a/corpus/commands.txt b/corpus/commands.txt
index bf8b322..29a4c47 100644
--- a/corpus/commands.txt
+++ b/corpus/commands.txt
@@ -169,3 +169,15 @@ wc -l $tmpfile
     (command_name (word))
     (word)
     (simple_expansion (variable_name))))
+
+======================================
+Heredocs with escaped expansions
+======================================
+
+cat  << EOF
+DEV_NAME=\$(lsblk)
+EOF
+
+---
+
+(program (redirected_statement (command (command_name (word))) (heredoc_redirect (heredoc_start))) (heredoc_body))
diff --git a/src/scanner.cc b/src/scanner.cc
index eb392d7..02b2cf0 100644
--- a/src/scanner.cc
+++ b/src/scanner.cc
@@ -61,6 +61,13 @@ struct Scanner {
           return did_advance;
         }
 
+        case '\\': {
+          did_advance = true;
+          advance(lexer);
+          advance(lexer);
+          break;
+        }
+
         case '$': {
           lexer->result_symbol = middle_type;
           return did_advance;