From cd63dc187240cd721fb68034cb7f320431b8aac7 Mon Sep 17 00:00:00 2001
From: Gokcehan <gokcehankara@gmail.com>
Date: Fri, 2 Sep 2016 21:32:11 +0300
Subject: [PATCH] unmap a binding or delete a command when expression is empty

With this commit `map`/`cmd` keywords are also used to remove a
binding/command by leaving the expression part empty (e.g. `map j`
removes keybinding for `j` or `cmd trash` removes `trash` command).

Mentioned in #16.
---
 eval.go | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/eval.go b/eval.go
index 33c5cbe..86bca8c 100644
--- a/eval.go
+++ b/eval.go
@@ -106,10 +106,18 @@ func (e *SetExpr) eval(app *App, args []string) {
 }
 
 func (e *MapExpr) eval(app *App, args []string) {
+	if e.expr == nil {
+		delete(gOpts.keys, e.keys)
+		return
+	}
 	gOpts.keys[e.keys] = e.expr
 }
 
 func (e *CmdExpr) eval(app *App, args []string) {
+	if e.expr == nil {
+		delete(gOpts.cmds, e.name)
+		return
+	}
 	gOpts.cmds[e.name] = e.expr
 }