From 7a2b4c9ea996c235459c53ccee57cc4aecee9724 Mon Sep 17 00:00:00 2001
From: koalaman <vidar@vidarholen.net>
Date: Thu, 3 Jul 2014 20:34:50 -0700
Subject: [PATCH] Created SC2088 (markdown)

---
 SC2088.md | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 SC2088.md

diff --git a/SC2088.md b/SC2088.md
new file mode 100644
index 0000000..e308d73
--- /dev/null
+++ b/SC2088.md
@@ -0,0 +1,32 @@
+## Note that ~ doesn't expand in quotes.
+
+### Problematic code:
+
+    rm "~/Desktop/$filename"
+
+### Correct code:
+
+    rm ~/"Desktop/$filename"
+
+### Rationale:
+
+Tilde does not expand to the user's home directory when it's double quoted. 
+
+To expand it, the tilde, the optional username, and its following slash should be outside of the double quotes. 
+
+These strings expand:
+
+    ~/file                    # Correct: tilde up to the slash is unquoted (as is everything else)
+    ~/"$var"                  # Correct: tilde up to the slash is unquoted
+    ~user/"hello world.txt"   # Correct: tilde up to the slash is unquoted
+
+These strings do not, leaving a literal tilde:
+
+    # Fails!
+    "~/file"                  # Wrong: tilde and slash are quoted when they shouldn't be.
+    ~"/file"                  # Wrong: slash is quoted when it shouldn't be.
+    ~user"/hello world.txt"   # Wrong: slash is quoted when it shouldn't be.
+
+### Contraindications
+
+If you don't want the tilde to be expanded, you can ignore this message.
\ No newline at end of file