From 5ef947894e40dae3789dc7336967f6d1e3d74d4d Mon Sep 17 00:00:00 2001
From: Sindre Sorhus <sindresorhus@gmail.com>
Date: Sun, 17 Nov 2019 13:35:27 +0700
Subject: [PATCH] Add support for `number` flag type (#103)

---
 index.d.ts |  2 +-
 readme.md  |  2 +-
 test.js    | 68 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 70 insertions(+), 2 deletions(-)

diff --git a/index.d.ts b/index.d.ts
index 9df36f8..67c50ff 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -8,7 +8,7 @@ declare namespace meow {
 
 		The key is the flag name and the value is an object with any of:
 
-		- `type`: Type of value. (Possible values: `string` `boolean`)
+		- `type`: Type of value. (Possible values: `string` `boolean` `number`)
 		- `alias`: Usually used to define a short flag alias.
 		- `default`: Default value when the flag is not specified.
 
diff --git a/readme.md b/readme.md
index db0645e..fbc7106 100644
--- a/readme.md
+++ b/readme.md
@@ -98,7 +98,7 @@ Define argument flags.
 
 The key is the flag name and the value is an object with any of:
 
-- `type`: Type of value. (Possible values: `string` `boolean`)
+- `type`: Type of value. (Possible values: `string` `boolean` `number`)
 - `alias`: Usually used to define a short flag alias.
 - `default`: Default value when the flag is not specified.
 
diff --git a/test.js b/test.js
index ef60764..8840a03 100644
--- a/test.js
+++ b/test.js
@@ -240,3 +240,71 @@ test('disable autoVersion/autoHelp if `cli.input.length > 0`', t => {
 	t.is(meow({argv: ['bar', '--help']}).input[0], 'bar');
 	t.is(meow({argv: ['bar', '--version', '--help']}).input[0], 'bar');
 });
+
+test('supports `number` flag type', t => {
+	const cli = meow({
+		argv: ['--foo=1.3'],
+		flags: {
+			foo: {
+				type: 'number'
+			}
+		}
+	}).flags.foo;
+
+	t.is(cli, 1.3);
+});
+
+test('supports `number` flag type - flag but no value', t => {
+	const cli = meow({
+		argv: ['--foo'],
+		flags: {
+			foo: {
+				type: 'number'
+			}
+		}
+	}).flags.foo;
+
+	t.is(cli, undefined);
+});
+
+test('supports `number` flag type - flag but no value but default', t => {
+	const cli = meow({
+		argv: ['--foo'],
+		flags: {
+			foo: {
+				type: 'number',
+				default: 2
+			}
+		}
+	}).flags.foo;
+
+	t.is(cli, 2);
+});
+
+test('supports `number` flag type - no flag but default', t => {
+	const cli = meow({
+		argv: [],
+		flags: {
+			foo: {
+				type: 'number',
+				default: 2
+			}
+		}
+	}).flags.foo;
+
+	t.is(cli, 2);
+});
+
+test('supports `number` flag type - throws on incorrect default value', t => {
+	t.throws(() => {
+		meow({
+			argv: [],
+			flags: {
+				foo: {
+					type: 'number',
+					default: 'x'
+				}
+			}
+		});
+	});
+});