remove the nightly feature

.travis.yml

@@ -15,8 +15,6 @@ env:
 
 matrix:
   include:
-    - rust: nightly
-      env: FEATURES='--features "nightly"'
     - rust: nightly
       env: FEATURES='--no-default-features'
       before_script:

Cargo.toml

@@ -24,7 +24,6 @@ include = [
 [features]
 alloc = []
 std = ["alloc", "memchr/use_std"]
-nightly = []
 default = ["std"]
 regexp = ["regex"]
 regexp_macros = ["regexp", "lazy_static"]

README.md

@@ -196,7 +196,6 @@ to handle the breaking changes.**
 There are a few compilation features:
 
 * `std`: (activated by default) if disabled, nom can work in `no_std` builds
-* `nightly`: enables helpful error messages if you use a nightly compiler
 * `regexp`: enables regular expression parsers with the `regex` crate
 * `regexp_macros`: enables regular expression parsers with the `regex` and `regex_macros` crates. Regular expressions can be defined at compile time, but it requires a nightly version of rustc
 * `verbose-errors`: accumulate error codes and input positions as you backtrack through the parser tree. This gives you precise information about which part of the parser was affected by which part of the input

doc/FAQ.md

@@ -2,6 +2,10 @@
 
 ### Using nightly to get better error messages
 
+**warning**: this only applies to nom 3. nom 4 uses the
+[compile_error](https://doc.rust-lang.org/std/macro.compile_error.html) macro
+available since Rust 1.20
+
 If you got the following error when compiling your nom parser:
 
 ```

src/bytes.rs

@@ -2003,10 +2003,10 @@ mod tests {
     assert_eq!(g("點點點a"), Ok(("a", "點點點")));
   }
 
-  #[cfg(feature = "nightly")]
+  #[cfg(nightly)]
   use test::Bencher;
 
-  #[cfg(feature = "nightly")]
+  #[cfg(nightly)]
   #[bench]
   fn take_while_bench(b: &mut Bencher) {
     use nom::is_alphabetic;

src/lib.rs

@@ -343,11 +343,9 @@
 #![cfg_attr(not(feature = "std"), feature(alloc))]
 #![cfg_attr(all(not(feature = "std"), feature = "alloc"), feature(alloc))]
 #![cfg_attr(not(feature = "std"), no_std)]
-#![cfg_attr(feature = "nightly", feature(test))]
-#![cfg_attr(feature = "nightly", feature(const_fn))]
-#![cfg_attr(feature = "nightly", feature(plugin))]
 //#![warn(missing_docs)]
 #![cfg_attr(feature = "cargo-clippy", allow(doc_markdown))]
+#![cfg_attr(nightly, feature(test))]
 
 #[cfg(all(not(feature = "std"), feature = "alloc"))]
 #[macro_use]
@@ -358,7 +356,7 @@ extern crate lazy_static;
 extern crate memchr;
 #[cfg(feature = "regexp")]
 extern crate regex;
-#[cfg(feature = "nightly")]
+#[cfg(nightly)]
 extern crate test;
 
 #[cfg(not(feature = "std"))]

src/multi.rs

@@ -1235,10 +1235,10 @@ mod tests {
     );
   }
 
-  #[cfg(feature = "nightly")]
+  #[cfg(nightly)]
   use test::Bencher;
 
-  #[cfg(feature = "nightly")]
+  #[cfg(nightly)]
   #[bench]
   fn many0_bench(b: &mut Bencher) {
     named!(multi<&[u8],Vec<&[u8]> >, many0!(tag!("abcd")));