Merge pull request #7 from miek/clippy

Clippy fixes

src/csv.rs

@@ -23,6 +23,7 @@ pub struct Record {
     pub freq_low: u64,
     pub freq_high: u64,
     pub freq_step: f32,
+    #[allow(dead_code)]
     pub num_samples: u32,
     pub samples: Vec<f32>,
 }
@@ -56,7 +57,7 @@ pub fn load_records(input_path: &str) -> Result<RecordCollection, Box<dyn Error>
         .trim(csv::Trim::All)
         .from_reader(input);
 
-    let mut rc = RecordCollection{ freq_low: std::u64::MAX, ..Default::default() };
+    let mut rc = RecordCollection{ freq_low: u64::MAX, ..Default::default() };
 
     // Loop through all lines & parse records
     // also keep track of frequency range & unique timestamps to determine final image size
@@ -72,7 +73,7 @@ pub fn load_records(input_path: &str) -> Result<RecordCollection, Box<dyn Error>
         rc.freq_low = std::cmp::min(rc.freq_low, record.freq_low);
         rc.freq_high = std::cmp::max(rc.freq_high, record.freq_high);
         if let Some(s) = step {
-            if (s - record.freq_step).abs() > std::f32::EPSILON {
+            if (s - record.freq_step).abs() > f32::EPSILON {
                 return Err("Frequency step must be constant".into());
             }
         } else {

src/draw.rs

@@ -26,9 +26,9 @@ pub fn colormaps() -> HashMap<&'static str, Gradient> {
 }
 
 fn build_lut(colormap: &Gradient) -> Vec<plotters::style::RGBColor> {
-    let mut lut = Vec::with_capacity(std::u16::MAX as usize + 1);
-    for i in 0..std::u16::MAX as usize + 1 {
-        let value = colormap.eval_continuous(i as f64 / std::u16::MAX as f64);
+    let mut lut = Vec::with_capacity(u16::MAX as usize + 1);
+    for i in 0..u16::MAX as usize + 1 {
+        let value = colormap.eval_continuous(i as f64 / u16::MAX as f64);
         lut.push(plotters::style::RGBColor(value.r, value.g, value.b));
     }
     lut