fix no_std for nightly

Author: domenukk

idna/src/uts46.rs

@@ -453,7 +453,7 @@ impl Idna {
             return Errors::default();
         }
         let mut errors = processing(domain, self.config, &mut self.normalized, out);
-        self.output = std::mem::replace(out, String::with_capacity(out.len()));
+        self.output = core::mem::replace(out, String::with_capacity(out.len()));
         let mut first = true;
         for label in self.output.split('.') {
             if !first {

url/Cargo.toml

@@ -28,14 +28,14 @@ debugger_test = "0.1"
 debugger_test_parser = "0.1"
 
 [dependencies]
-form_urlencoded = { version = "1.1.0", path = "../form_urlencoded" }
-idna = { version = "0.3.0", path = "../idna" }
-percent-encoding = { version = "2.2.0", path = "../percent_encoding" }
+form_urlencoded = { version = "1.1.0", path = "../form_urlencoded", default-features = false }
+idna = { version = "0.3.0", path = "../idna", default-features = false  }
+percent-encoding = { version = "2.2.0", path = "../percent_encoding", default-features = false }
 serde = {version = "1.0", optional = true, features = ["derive"]}
 
 [features]
 default = ["std"]
-std = ["idna/std", "alloc"]
+std = ["idna/std", "percent-encoding/std", "form_urlencoded/std", "alloc"]
 alloc = []
 # UNSTABLE FEATURES (requires Rust nightly)
 # Enable to use the #[debugger_visualizer] attribute.

url/src/host.rs

@@ -11,10 +11,13 @@ use alloc::{
     string::{String, ToString},
     vec::Vec,
 };
+#[cfg(not(feature = "std"))]
+use core::net::{Ipv4Addr, Ipv6Addr};
 use core::{
     cmp,
     fmt::{self, Formatter},
 };
+#[cfg(feature = "std")]
 use std::net::{Ipv4Addr, Ipv6Addr};
 
 use percent_encoding::{percent_decode, utf8_percent_encode, CONTROLS};

url/src/lib.rs

@@ -127,13 +127,16 @@ url = { version = "2", features = ["serde"] }
     feature(debugger_visualizer),
     debugger_visualizer(natvis_file = "../../debug_metadata/url.natvis")
 )]
+#![no_std]
+#![cfg_attr(not(feature = "std"), feature(ip_in_core))]
 
 pub use form_urlencoded;
 
 // For forwards compatibility
 #[cfg(feature = "std")]
 extern crate std;
 
+#[macro_use]
 extern crate alloc;
 
 #[cfg(not(feature = "alloc"))]
@@ -152,9 +155,12 @@ use core::convert::TryFrom;
 use core::fmt::{self, Write};
 use core::hash;
 use core::mem;
+#[cfg(not(feature = "std"))]
+use core::net::IpAddr;
 use core::ops::{Range, RangeFrom, RangeTo};
 use core::str;
 use percent_encoding::utf8_percent_encode;
+#[cfg(feature = "std")]
 use std::net::IpAddr;
 #[cfg(feature = "std")]
 use std::{