From dc51bab893660979ac728636e98d24b5a36ad7fd Mon Sep 17 00:00:00 2001
From: Jonas Maier <jonas@x77.dev>
Date: Wed, 18 Mar 2026 13:49:34 +0100
Subject: backslash to put command on multiple lines

---
 src/parse/mod.rs | 25 ++++++++++++++-----------
 1 file changed, 14 insertions(+), 11 deletions(-)

(limited to 'src/parse/mod.rs')

diff --git a/src/parse/mod.rs b/src/parse/mod.rs
index f418600..8682f04 100644
--- a/src/parse/mod.rs
+++ b/src/parse/mod.rs
@@ -663,23 +663,26 @@ impl StringDelimiter {
     }
 }
 
-fn parse_escape_code(b: &mut Cursor<'_>) -> Result<u8> {
-    let x = b.peek();
+fn parse_escape_code(b: &mut Cursor<'_>) -> Result<Option<u8>> {
+    if !b.has() {
+        return Err(ParseError::Eof);
+    }
+
+    let x = b.adv();
 
     let y = match x {
+        b'\n' => return Ok(None),
         b'n' => b'\n',
         b'r' => b'\r',
         b't' => b'\t',
         b'e' => 0x1b, // escape
         b'x' => {
             // parse two hex digits
-            b.adv();
             if b.buf.len() < 2 {
                 Err(ParseError::Eof)?;
             }
-            let x1 = b.peek();
-            b.adv();
-            let x2 = b.peek();
+            let x1 = b.adv();
+            let x2 = b.adv();
 
             if !x1.is_ascii_hexdigit() || !x2.is_ascii_hexdigit() {
                 Err(ParseError::NotHexDigit)?;
@@ -693,9 +696,7 @@ fn parse_escape_code(b: &mut Cursor<'_>) -> Result<u8> {
         _ => x,
     };
 
-    b.adv();
-
-    Ok(y)
+    Ok(Some(y))
 }
 
 impl Parse for ExpString {
@@ -733,7 +734,9 @@ impl Parse for ExpString {
                 let x = b.adv();
 
                 if x == b'\\' {
-                    add_char(p, parse_escape_code(b)?);
+                    if let Some(x) = parse_escape_code(b)? {
+                        add_char(p, x);
+                    }
                 } else if x == b'$' && !delim.is_strict() {
                     if !b.has() {
                         add_char(p, b'$');
@@ -865,7 +868,7 @@ impl Command<PreExpansion> {
 }
 
 #[allow(unused)]
-#[derive(Debug)]
+#[derive(Debug, PartialEq)]
 pub enum ParseError {
     /// "clean" EOF, i.e. not in the middle of something
     Eof,
-- 
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