From 6995484ee3a4a505c1c8705709f8dc00899013b3 Mon Sep 17 00:00:00 2001
From: Hansuk <flavono123@gmail.com>
Date: Thu, 16 Jan 2020 00:38:27 +0900
Subject: support scientific nations for float options

- reference: https://stackoverflow.com/questions/638565/parsing-scientific-notation-sensibly
- remove the todo comment(no idea for etc)

Signed-off-by: Hansuk <flavono123@gmail.com>
---
 lib/slop/types.rb | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to 'lib')

diff --git a/lib/slop/types.rb b/lib/slop/types.rb
index 07d7e62..c1055ea 100644
--- a/lib/slop/types.rb
+++ b/lib/slop/types.rb
@@ -52,8 +52,7 @@ module Slop
   # Cast the option argument to a Float.
   class FloatOption < Option
     def call(value)
-      # TODO: scientific notation, etc.
-      value =~ /\A[+-]?\d*\.*\d+\z/ && value.to_f
+      value =~ /\A[+-]?(?:0|[1-9]\d*)(?:\.\d*)?(?:[eE][+-]?\d+)?\z/ && value.to_f
     end
   end
 
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