update to Unicode 9 ; clean up no_std and related

Author: kwantam

.travis.yml

@@ -2,12 +2,12 @@ language: rust
 rust: 'nightly'
 sudo: false
 script:
-  - cargo build --verbose --features no_std
-  - cargo test --verbose --features no_std
+  - cargo build --verbose --features bench
+  - cargo test --verbose --features bench
+  - cargo bench --verbose --features bench
   - cargo clean
-  - cargo build --verbose --features default
-  - cargo test --verbose --features default
-  - cargo bench --verbose --features default
+  - cargo build --verbose
+  - cargo test --verbose
   - rustdoc --test README.md -L target/debug -L target/debug/deps
   - cargo doc
 after_success: |

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 
 name = "unicode-width"
-version = "0.1.3"
+version = "0.1.4"
 authors = ["kwantam <kwantam@gmail.com>"]
 
 homepage = "https://github.com/unicode-rs/unicode-width"
@@ -20,3 +20,4 @@ exclude = [ "target/*", "Cargo.lock" ]
 [features]
 default = []
 no_std = []
+bench = []

README.md

@@ -25,8 +25,8 @@ fn main() {
 
 ## features
 
-unicode-width supports a `no_std` feature. This eliminates dependence
-on std, and instead uses equivalent functions from core.
+unicode-width does not depend on libstd, so it can be used in crates
+with the `#![no_std]` attribute.
 
 ## crates.io
 
@@ -35,5 +35,5 @@ to your `Cargo.toml`:
 
 ```toml
 [dependencies]
-unicode-width = "0.1.3"
+unicode-width = "0.1.4"
 ```

scripts/unicode.py

@@ -199,19 +199,12 @@ def emit_table(f, name, t_data, t_type = "&'static [(char, char)]", is_pub=True,
 def emit_charwidth_module(f, width_table):
     f.write("pub mod charwidth {")
     f.write("""
-    #[cfg(feature = "no_std")]
     use core::option::Option::{self, Some, None};
-    #[cfg(feature = "no_std")]
-    use core::slice::SliceExt;
-    #[cfg(feature = "no_std")]
     use core::result::Result::{Ok, Err};
 
     #[inline]
     fn bsearch_range_value_table(c: char, is_cjk: bool, r: &'static [(char, char, u8, u8)]) -> u8 {
-        #[cfg(feature = "no_std")]
         use core::cmp::Ordering::{Equal, Less, Greater};
-        #[cfg(not(feature = "no_std"))]
-        use std::cmp::Ordering::{Equal, Less, Greater};
         match r.binary_search_by(|&(lo, hi, _, _)| {
             if lo <= c && c <= hi { Equal }
             else if hi < c { Less }

src/lib.rs

@@ -39,32 +39,27 @@
 //!
 //! ```toml
 //! [dependencies]
-//! unicode-width = "0.1.1"
+//! unicode-width = "0.1.4"
 //! ```
 
 #![deny(missing_docs, unsafe_code)]
 #![doc(html_logo_url = "https://unicode-rs.github.io/unicode-rs_sm.png",
        html_favicon_url = "https://unicode-rs.github.io/unicode-rs_sm.png")]
 
-#![cfg_attr(feature = "no_std", no_std)]
-#![cfg_attr(feature = "no_std", feature(no_std, core_slice_ext, core_str_ext))]
+#![cfg_attr(feature = "bench", feature(test))]
+#![no_std]
 
-#![cfg_attr(test, feature(test))]
-
-#[cfg(all(test, feature = "no_std"))]
+#[cfg(test)]
 #[macro_use]
 extern crate std;
 
-#[cfg(test)]
+#[cfg(feature = "bench")]
 extern crate test;
 
 use tables::charwidth as cw;
 pub use tables::UNICODE_VERSION;
 
-#[cfg(feature = "no_std")]
 use core::ops::Add;
-#[cfg(not(feature = "no_std"))]
-use std::ops::Add;
 
 mod tables;
 

src/tables.rs

@@ -8,14 +8,16 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#[cfg(feature = "bench")]
 use std::iter;
+#[cfg(feature = "bench")]
 use test::{self, Bencher};
-
+#[cfg(feature = "bench")]
 use super::UnicodeWidthChar;
 
-#[cfg(feature = "no_std")]
 use std::prelude::v1::*;
 
+#[cfg(feature = "bench")]
 #[bench]
 fn cargo(b: &mut Bencher) {
     let string = iter::repeat('a').take(4096).collect::<String>();
@@ -27,6 +29,7 @@ fn cargo(b: &mut Bencher) {
     });
 }
 
+#[cfg(feature = "bench")]
 #[bench]
 #[allow(deprecated)]
 fn stdlib(b: &mut Bencher) {
@@ -39,6 +42,7 @@ fn stdlib(b: &mut Bencher) {
     });
 }
 
+#[cfg(feature = "bench")]
 #[bench]
 fn simple_if(b: &mut Bencher) {
     let string = iter::repeat('a').take(4096).collect::<String>();
@@ -50,6 +54,7 @@ fn simple_if(b: &mut Bencher) {
     });
 }
 
+#[cfg(feature = "bench")]
 #[bench]
 fn simple_match(b: &mut Bencher) {
     let string = iter::repeat('a').take(4096).collect::<String>();
@@ -61,6 +66,7 @@ fn simple_match(b: &mut Bencher) {
     });
 }
 
+#[cfg(feature = "bench")]
 #[inline]
 fn simple_width_if(c: char) -> Option<usize> {
     let cu = c as u32;
@@ -77,6 +83,7 @@ fn simple_width_if(c: char) -> Option<usize> {
     }
 }
 
+#[cfg(feature = "bench")]
 #[inline]
 fn simple_width_match(c: char) -> Option<usize> {
     match c as u32 {