Don't add std feature to rand_isaac and rand_xorshift

.travis.yml

@@ -14,10 +14,8 @@ matrix:
         # TODO: use --tests instead of --lib on more recent compiler
         - cargo test --lib --no-default-features
         - cargo test --package rand_core --no-default-features
-        - cargo test --package rand_isaac --no-default-features
-        - cargo test --package rand_isaac --features serde1,std
-        - cargo test --package rand_xorshift --no-default-features
-        - cargo test --package rand_xorshift --features serde1,std
+        - cargo test --package rand_isaac --features serde1
+        - cargo test --package rand_xorshift --features serde1
         - cargo test --features serde1,log
     - rust: stable
       os: osx
@@ -25,20 +23,16 @@ matrix:
       script:
         - cargo test --tests --no-default-features
         - cargo test --package rand_core --no-default-features
-        - cargo test --package rand_isaac --no-default-features
-        - cargo test --package rand_isaac --features serde1,std
-        - cargo test --package rand_xorshift --no-default-features
-        - cargo test --package rand_xorshift --features serde1,std
+        - cargo test --package rand_isaac --features serde1
+        - cargo test --package rand_xorshift --features serde1
         - cargo test --features serde1,log
     - rust: beta
       install:
       script:
         - cargo test --tests --no-default-features
         - cargo test --package rand_core --no-default-features
-        - cargo test --package rand_isaac --no-default-features
-        - cargo test --package rand_isaac --features serde1,std
-        - cargo test --package rand_xorshift --no-default-features
-        - cargo test --package rand_xorshift --features serde1,std
+        - cargo test --package rand_isaac --features serde1
+        - cargo test --package rand_xorshift --features serde1
         - cargo test --features serde1,log
     - rust: nightly
       install:
@@ -49,7 +43,7 @@ matrix:
         - cargo test --tests --no-default-features --features=alloc
         - cargo test --package rand_core --no-default-features --features=alloc,serde1
         - cargo test --features serde1,log,nightly,alloc
-        - cargo test --all --all-features --benches
+        - cargo test --all --benches
         # remove cached documentation, otherwise files from previous PRs can get included
         - rm -rf target/doc
         - cargo doc --no-deps --all --all-features

Cargo.toml

@@ -20,7 +20,7 @@ appveyor = { repository = "alexcrichton/rand" }
 [features]
 default = ["std" ] # without "std" rand uses libcore
 nightly = ["i128_support", "simd_support"] # enables all features requiring nightly rust
-std = ["rand_core/std", "rand_isaac/std", "rand_xorshift/std", "alloc", "libc", "winapi", "cloudabi", "fuchsia-zircon"]
+std = ["rand_core/std", "alloc", "libc", "winapi", "cloudabi", "fuchsia-zircon"]
 alloc = ["rand_core/alloc"]  # enables Vec and Box support (without std)
 i128_support = [] # enables i128 and u128 support
 simd_support = [] # enables SIMD support

rand_isaac/Cargo.toml

@@ -19,7 +19,6 @@ appveyor = { repository = "alexcrichton/rand" }
 
 [features]
 serde1 = ["serde", "serde_derive", "rand_core/serde1"]
-std = []
 
 [dependencies]
 rand_core = { path = "../rand_core", version = "0.2", default-features=false }

rand_isaac/src/lib.rs

@@ -18,15 +18,17 @@
 #![deny(missing_debug_implementations)]
 #![doc(test(attr(allow(unused_variables), deny(warnings))))]
 
-#![cfg_attr(not(feature="std"), no_std)]
+#![cfg_attr(not(all(feature="serde1", test)), no_std)]
 
-#[cfg(feature="std")] extern crate std as core;
 extern crate rand_core;
 
-#[cfg(all(feature="serde1", test))] extern crate bincode;
 #[cfg(feature="serde1")] extern crate serde;
 #[cfg(feature="serde1")] #[macro_use] extern crate serde_derive;
 
+// To test serialization we need bincode and the standard library
+#[cfg(all(feature="serde1", test))] extern crate bincode;
+#[cfg(all(feature="serde1", test))] extern crate std as core;
+
 pub mod isaac;
 pub mod isaac64;
 

rand_xorshift/Cargo.toml

@@ -19,7 +19,6 @@ appveyor = { repository = "alexcrichton/rand" }
 
 [features]
 serde1 = ["serde", "serde_derive"]
-std = []
 
 [dependencies]
 rand_core = { path = "../rand_core", version = "0.2", default-features=false }

rand_xorshift/src/lib.rs

@@ -18,14 +18,16 @@
 #![deny(missing_debug_implementations)]
 #![doc(test(attr(allow(unused_variables), deny(warnings))))]
 
-#![cfg_attr(not(feature="std"), no_std)]
+#![cfg_attr(not(all(feature="serde1", test)), no_std)]
 
-#[cfg(feature="std")] extern crate std as core;
 extern crate rand_core;
 
 #[cfg(feature="serde1")] extern crate serde;
 #[cfg(feature="serde1")] #[macro_use] extern crate serde_derive;
+
+// To test serialization we need bincode and the standard library
 #[cfg(all(feature="serde1", test))] extern crate bincode;
+#[cfg(all(feature="serde1", test))] extern crate std as core;
 
 mod xorshift;