From dd2f94dd086422cd4693a1c64068472518afdea5 Mon Sep 17 00:00:00 2001
From: Chris Wong <lambda.fairy@gmail.com>
Date: Fri, 12 Aug 2022 22:35:20 +1000
Subject: [PATCH] Add `maud::display`

---
 maud/src/lib.rs | 31 ++++++++++++++++++++++++++++++-
 1 file changed, 30 insertions(+), 1 deletion(-)

diff --git a/maud/src/lib.rs b/maud/src/lib.rs
index 73ac24f5..7ee4a3a8 100644
--- a/maud/src/lib.rs
+++ b/maud/src/lib.rs
@@ -12,7 +12,7 @@
 extern crate alloc;
 
 use alloc::{borrow::Cow, boxed::Box, string::String};
-use core::fmt::{self, Arguments, Write};
+use core::fmt::{self, Arguments, Display, Write};
 
 pub use maud_macros::{html, html_debug};
 
@@ -184,6 +184,35 @@ impl_render_with_itoa! {
     u8 u16 u32 u64 u128 usize
 }
 
+/// Renders a value using its [`Display`] impl.
+/// 
+/// # Example
+/// 
+/// ```rust
+/// use maud::html;
+/// use std::net::Ipv4Addr;
+/// 
+/// let ip_address = Ipv4Addr::new(127, 0, 0, 1);
+/// 
+/// let markup = html! {
+///     "My IP address is: "
+///     (maud::display(ip_address))
+/// };
+/// 
+/// assert_eq!(markup.into_string(), "My IP address is: 127.0.0.1");
+/// ```
+pub fn display(value: impl Display) -> impl Render {
+    struct DisplayWrapper<T>(T);
+
+    impl<T: Display> Render for DisplayWrapper<T> {
+        fn render_to(&self, w: &mut String) {
+            format_args!("{0}", self.0).render_to(w);
+        }
+    }
+
+    DisplayWrapper(value)
+}
+
 /// A wrapper that renders the inner value without escaping.
 #[derive(Debug, Clone, Copy)]
 pub struct PreEscaped<T: AsRef<str>>(pub T);