From a327db72850a16dcbdc68dffd162ac853868a274 Mon Sep 17 00:00:00 2001
From: Damian Poddebniak <poddebniak@fh-muenster.de>
Date: Sat, 15 May 2021 19:26:20 +0200
Subject: [PATCH] Add `number` parser.

---
 src/parse/mod.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/parse/mod.rs b/src/parse/mod.rs
index 083fc96..de552a9 100644
--- a/src/parse/mod.rs
+++ b/src/parse/mod.rs
@@ -4,6 +4,7 @@ use abnf_core::streaming::{is_ALPHA, is_DIGIT};
 use nom::{
     branch::alt,
     bytes::streaming::{tag, take_while},
+    character::streaming::digit1,
     combinator::{map_res, opt, recognize},
     sequence::tuple,
     IResult,
@@ -35,3 +36,7 @@ pub fn base64(input: &[u8]) -> IResult<&[u8], &str> {
 
     Ok((remaining, base64))
 }
+
+pub fn number(input: &[u8]) -> IResult<&[u8], u32> {
+    map_res(map_res(digit1, from_utf8), str::parse::<u32>)(input) // FIXME(perf): use from_utf8_unchecked
+}