Merge pull request #475 from remilauzier/master

fix some warnings

Author: bvssvni

Cargo.toml

@@ -1,6 +1,7 @@
 [package]
 name = "piston-examples"
 version = "0.0.0"
+edition = "2018"
 authors = ["bvssvni <[email protected]>"]
 keywords = []
 

examples/cube.rs

@@ -56,7 +56,7 @@ fn main() {
         .unwrap();
     window.set_capture_cursor(true);
 
-    let ref mut factory = window.factory.clone();
+    let mut factory = window.factory.clone();
 
     let vertex_data = vec![
         //top (0, 0, 1)
@@ -147,7 +147,7 @@ fn main() {
     );
 
     let mut data = pipe::Data {
-            vbuf: vbuf.clone(),
+            vbuf,
             u_model_view_proj: [[0.0; 4]; 4],
             t_color: (texture_view, factory.create_sampler(sinfo)),
             out_color: window.output_color.clone(),
@@ -171,7 +171,7 @@ fn main() {
             window.encoder.draw(&slice, &pso, &data);
         });
 
-        if let Some(_) = e.resize_args() {
+        if e.resize_args().is_some() {
             projection = get_projection(&window);
             data.out_color = window.output_color.clone();
             data.out_depth = window.output_stencil.clone();

examples/multi_window.rs

@@ -8,7 +8,7 @@ fn create_window(number: usize) -> PistonWindow {
 }
 
 fn main() {
-    let mut windows: Vec<_> = (0..3 as usize).into_iter().map(|n|
+    let mut windows: Vec<_> = (0..3_usize).into_iter().map(|n|
         create_window(n).position([100 + n as i32 * 300, 100])).collect();
     let colors = vec![[1.0, 0.0, 0.0, 1.0], [0.0, 1.0, 0.0, 1.0], [0.0, 0.0, 1.0, 1.0]];
 

examples/paint.rs

@@ -30,7 +30,7 @@ fn main() {
     let mut last_pos: Option<[f64; 2]> = None;
 
     while let Some(e) = window.next() {
-        if let Some(_) = e.render_args() {
+        if e.render_args().is_some() {
             texture.update(&mut texture_context, &canvas).unwrap();
             window.draw_2d(&e, |c, g, device| {
                 // Update texture before rendering.

examples/sprite.rs

@@ -39,7 +39,7 @@ fn main() {
             Flip::None,
             &TextureSettings::new()
         ).unwrap());
-    let mut sprite = Sprite::from_texture(tex.clone());
+    let mut sprite = Sprite::from_texture(tex);
     sprite.set_position(width as f64 / 2.0, height as f64 / 2.0);
 
     id = scene.add_child(sprite);
@@ -74,7 +74,7 @@ fn main() {
             clear([1.0, 1.0, 1.0, 1.0], g);
             scene.draw(c.transform, g);
         });
-        if let Some(_) = e.press_args() {
+        if e.press_args().is_some() {
             scene.toggle(id, &seq);
             scene.toggle(id, &rotate);
         }

examples/texture_swap.rs

@@ -39,7 +39,7 @@ fn main() {
     let mut counter = 0;
     window.set_bench_mode(true);
     while let Some(e) = window.next() {
-        if let Some(_) = e.render_args() {
+        if e.render_args().is_some() {
             counter += 1;
             if counter > frames { break; }
         }