From 336e8f72559b489396c5cd503c4586ef800c2a8f Mon Sep 17 00:00:00 2001
From: Benno Schulenberg <bensberg@telfort.nl>
Date: Sun, 20 Feb 2022 15:06:02 +0100
Subject: [PATCH] nls: add compose sequences for leftward, upward and downward
 double arrow
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

These sequences follow the logic of: the arrow shaft (=) first, the
arrow head (< or > or ^ or v) second.  This is so because the sequence
<= is already taken for ≤, and there is no obvious ASCII character for
a double vertical line, so we have to make do with a horizontal one.

Since commit 6101b967b6 from eight years ago, there is a compose sequence
for the rightward double arrow, but not for the other three directions.

This fixes issue #138.

Requested-by: Mélanie Chauvel

Signed-off-by: Benno Schulenberg <bensberg@telfort.nl>
---
 nls/en_US.UTF-8/Compose.pre | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/nls/en_US.UTF-8/Compose.pre b/nls/en_US.UTF-8/Compose.pre
index f9da20a3..bbbaea96 100644
--- a/nls/en_US.UTF-8/Compose.pre
+++ b/nls/en_US.UTF-8/Compose.pre
@@ -4527,7 +4527,10 @@ XCOMM Arrows
 <Multi_key> <minus> <greater>		: "→"	U2192 # RIGHTWARDS ARROW
 <Multi_key> <bar> <v>			: "↓"	U2193 # DOWNWARDS ARROW
 <Multi_key> <v> <bar>			: "↓"	U2193 # DOWNWARDS ARROW
+<Multi_key> <equal> <less>		: "⇐"	U21D0 # LEFTWARDS DOUBLE ARROW
+<Multi_key> <equal> <asciicircum>	: "⇑"	U21D1 # UPWARDS DOUBLE ARROW
 <Multi_key> <equal> <greater>		: "⇒"	U21D2 # RIGHTWARDS DOUBLE ARROW
+<Multi_key> <equal> <v>			: "⇓"	U21D3 # DOWNWARDS DOUBLE ARROW
 
 XCOMM Mathematical Operators
 <Multi_key> <U2203> <U0338>		: "∄"	U2204 # THERE DOES NOT EXIST