rustup for beta.

Cargo.toml

@@ -2,9 +2,13 @@
 name = "qrcode"
 description = "QR code encoder in Rust"
 license = "Apache-2.0"
-version = "0.1.3"
+version = "0.1.4"
 authors = ["kennytm <kennytm@gmail.com>"]
 keywords = ["qrcode"]
 repository = "https://github.com/kennytm/qrcode-rust"
 readme = "README.md"
 documentation = "http://www.rust-ci.org/kennytm/qrcode-rust/doc/qrcode/index.html"
+
+[dependencies]
+num = "*"
+

src/bits.rs

@@ -3,7 +3,6 @@
 //! The `bits` module encodes binary data into raw bits used in a QR code.
 
 use std::cmp::min;
-use std::iter::iterate;
 
 #[cfg(test)]
 use test::Bencher;
@@ -143,7 +142,7 @@ fn bench_push_splitted_bytes(bencher: &mut Bencher) {
 
 /// An "extended" mode indicator, includes all indicators supported by QR code
 /// beyond those bearing data.
-#[derive(Copy)]
+#[derive(Copy, Clone)]
 pub enum ExtendedMode {
     /// ECI mode indicator, to introduce an ECI designator.
     Eci,
@@ -676,10 +675,12 @@ impl Bits {
         }
 
         if self.len() < data_length {
+            const PADDING_BYTES: &'static [u8] = &[0b11101100, 0b00010001];
+
             self.bit_offset = 0;
             let data_bytes_length = data_length / 8;
             let padding_bytes_count = data_bytes_length - self.data.len();
-            let padding = iterate(0b11101100, |a| a ^ 0b11111101).take(padding_bytes_count);
+            let padding = PADDING_BYTES.iter().cloned().cycle().take(padding_bytes_count);
             self.data.extend(padding);
         }
 

src/canvas.rs

@@ -9,13 +9,19 @@
 //!     c.apply_mask(MaskPattern::Checkerboard);
 //!     let bools = c.to_bools();
 
-use std::iter::{range_inclusive, repeat};
-use std::iter::order::equals;
-use std::num::Int;
+use std::iter::repeat;
 use std::cmp::max;
+use num::traits::PrimInt;
+use std::ops::Range;
 
 use types::{Version, EcLevel};
 
+// TODO remove this after it is decided whether we want `p ... q` or
+//      `(p .. q).inclusive()`
+fn range_inclusive<N: PrimInt>(from: N, to: N) -> Range<N> {
+    from .. (to + N::one())
+}
+
 //------------------------------------------------------------------------------
 //{{{ Modules
 
@@ -621,10 +627,10 @@ impl Canvas {
     /// `off_color`. The coordinates will be extracted from the `coords`
     /// iterator. It will start from the most significant bits first, so
     /// *trailing* zeros will be ignored.
-    fn draw_number<N: Int>(&mut self, number: N,
-                           on_color: Module, off_color: Module,
-                           coords: &[(i16, i16)]) {
-        let zero: N = Int::zero();
+    fn draw_number<N: PrimInt>(&mut self, number: N,
+                               on_color: Module, off_color: Module,
+                               coords: &[(i16, i16)]) {
+        let zero: N = N::zero();
         let mut mask: N = !(!zero >> 1);
         for &(x, y) in coords {
             let color = if (mask & number) == zero { off_color } else { on_color };
@@ -887,8 +893,6 @@ impl Canvas {
 /// Gets whether the module at the given coordinates represents a functional
 /// module.
 pub fn is_functional(version: Version, width: i16, x: i16, y: i16) -> bool {
-    use std::num::SignedInt;
-
     debug_assert!(width == version.width());
 
     let x = if x < 0 { x + width } else { x };
@@ -1372,7 +1376,7 @@ mod draw_codewords_test {
 
 /// The mask patterns. Since QR code and Micro QR code do not use the same
 /// pattern number, we name them according to their shape instead of the number.
-#[derive(Debug, Copy)]
+#[derive(Debug, Copy, Clone)]
 pub enum MaskPattern {
     /// QR code pattern 000: `(x + y) % 2 == 0`.
     Checkerboard = 0b000,
@@ -1649,6 +1653,13 @@ impl Canvas {
             Module::Dark, Module::Light, Module::Dark,
         ];
 
+        // TODO remove this after `equals()` is stable.
+        fn equals<T, U>(left: T, right: U) -> bool
+            where T: Iterator, U: Iterator, T::Item: PartialEq<U::Item>
+        {
+            left.zip(right).all(|(p, q)| p == q)
+        }
+
         let mut total_score = 0;
 
         for i in 0 .. self.width {
@@ -1845,11 +1856,23 @@ impl Canvas {
             Version::Micro(_) => ALL_PATTERNS_MICRO_QR.iter(),
         };
 
-        patterns.map(|ptn| {
+        let mut patterns = patterns.map(|ptn| {
             let mut c = self.clone();
             c.apply_mask(*ptn);
             c
-        }).min_by(|c| c.compute_total_penalty_scores()).unwrap()
+        });
+
+        // TODO revert to `min_by` after it is stable.
+        let mut best_pattern = patterns.next().unwrap();
+        let mut best_pattern_score = best_pattern.compute_total_penalty_scores();
+        for c in patterns {
+            let score = c.compute_total_penalty_scores();
+            if score < best_pattern_score {
+                best_pattern = c;
+                best_pattern_score = score;
+            }
+        }
+        best_pattern
     }
 
     /// Convert the modules into a vector of booleans.

src/lib.rs

@@ -19,9 +19,11 @@
 //!
 
 #![unstable]
-#![feature(test, core)] // Unstable libraries
+#![cfg_attr(test, feature(test))] // Unstable libraries
 
+#[cfg(test)]
 extern crate test;
+extern crate num;
 
 use std::ops::Index;
 

src/optimize.rs

@@ -322,8 +322,8 @@ impl<I: Iterator<Item=Segment>> Iterator for Optimizer<I> {
 
 /// Computes the total encoded length of all segments.
 pub fn total_encoded_len(segments: &[Segment], version: Version) -> usize {
-    use std::iter::AdditiveIterator;
-    segments.iter().map(|seg| seg.encoded_len(version)).sum()
+    // TODO revert to `.map().sum()` after `sum()` is stable.
+    segments.iter().fold(0, |acc, seg| acc + seg.encoded_len(version))
 }
 
 #[cfg(test)]
@@ -471,7 +471,7 @@ fn bench_optimize(bencher: &mut Bencher) {
 /// All values of `u8` can be split into 9 different character sets when
 /// determining which encoding to use. This enum represents these groupings for
 /// parsing purpose.
-#[derive(Copy)]
+#[derive(Copy, Clone)]
 enum ExclCharSet {
     /// The end of string.
     End = 0,
@@ -531,7 +531,7 @@ impl ExclCharSet {
 }
 
 /// The current parsing state.
-#[derive(Copy)]
+#[derive(Copy, Clone)]
 enum State {
     /// Just initialized.
     Init = 0,
@@ -558,7 +558,7 @@ enum State {
 }
 
 /// What should the parser do after a state transition.
-#[derive(Copy)]
+#[derive(Copy, Clone)]
 enum Action {
     /// The parser should do nothing.
     Idle,