fix some clippy suggestions

.clippy.toml

@@ -0,0 +1 @@
+msrv = "1.46.0"

examples/riio_bufavg.rs

@@ -69,8 +69,8 @@ impl Averager {
     // Creates a new averager with the specified offset and scale.
     pub fn new(offset: f64, scale: f64) -> Self {
         let (sender, receiver) = channel();
-        let thr = spawn(move || Averager::thread_func(receiver, offset, scale));
-        Averager { sender, thr }
+        let thr = spawn(move || Self::thread_func(receiver, offset, scale));
+        Self { sender, thr }
     }
 
     // The internal thread function.

src/bin/iio_info_rs.rs

@@ -14,7 +14,7 @@
 use industrial_io as iio;
 use std::process;
 
-fn main() -> iio::Result<()> {
+fn main() {
     let lib_ver = iio::library_version();
     println!("Library version: {}", lib_ver);
 
@@ -27,7 +27,7 @@ fn main() -> iio::Result<()> {
 
     println!("{} context attribute(s) found", ctx.num_attrs());
     for attr in ctx.attributes() {
-        println!("\t{}: {}", attr.0, attr.1)
+        println!("\t{}: {}", attr.0, attr.1);
     }
 
     println!("IIO context has {} device(s):", ctx.num_devices());
@@ -69,11 +69,11 @@ fn main() -> iio::Result<()> {
         if dev.has_attrs() {
             println!("\t\tAttributes:");
             for attr in dev.attributes() {
-                let val_str = dev.attr_read_str(&attr).unwrap_or("Unknown".into());
+                let val_str = dev
+                    .attr_read_str(&attr)
+                    .unwrap_or_else(|_| String::from("Unknown"));
                 println!("\t\t\t{}: {}", attr, val_str);
             }
         }
     }
-
-    Ok(())
 }

src/buffer.rs

@@ -54,7 +54,7 @@ use std::{
     collections::HashMap,
     marker::PhantomData,
     mem,
-    os::raw::{c_int, c_longlong, c_void},
+    os::raw::{c_int, c_longlong},
     ptr,
 };
 
@@ -262,7 +262,7 @@ impl Buffer {
     /// retrieve all the attributes with a single call.
     pub fn attr_read_all(&self) -> Result<HashMap<String, String>> {
         let mut map = HashMap::new();
-        let pmap = &mut map as *mut _ as *mut c_void;
+        let pmap = (&mut map as *mut HashMap<_, _>).cast();
         let ret = unsafe {
             ffi::iio_device_buffer_attr_read_all(self.dev.dev, Some(attr_read_all_cb), pmap)
         };
@@ -338,7 +338,7 @@ impl Buffer {
     /// Gets an iterator for the data from a channel.
     pub fn channel_iter<T>(&self, chan: &Channel) -> IntoIter<T> {
         unsafe {
-            let begin = ffi::iio_buffer_first(self.buf, chan.chan) as *mut T;
+            let begin = ffi::iio_buffer_first(self.buf, chan.chan).cast();
             let end = ffi::iio_buffer_end(self.buf) as *const T;
             let ptr = begin;
             let step: isize = ffi::iio_buffer_step(self.buf) / mem::size_of::<T>() as isize;
@@ -377,7 +377,7 @@ impl<T> Iterator for IntoIter<T> {
 
     fn next(&mut self) -> Option<T> {
         unsafe {
-            if self.ptr as *const _ >= self.end {
+            if self.ptr.cast() >= self.end {
                 None
             }
             else {

src/channel.rs

@@ -70,7 +70,7 @@ pub struct DataFormat {
 impl DataFormat {
     /// Creates a new data format from the underlyinh library type.
     fn new(data_fmt: ffi::iio_data_format) -> Self {
-        DataFormat { data_fmt }
+        Self { data_fmt }
     }
 
     /// Gets total length of the sample, in bits.
@@ -108,7 +108,7 @@ impl DataFormat {
         self.data_fmt.with_scale
     }
 
-    /// Contains the scale to apply if with_scale is set
+    /// Contains the scale to apply if `with_scale` is set
     pub fn scale(&self) -> f64 {
         self.data_fmt.scale
     }
@@ -124,9 +124,9 @@ impl DataFormat {
         nbytes as usize
     }
 
-    /// Gets the TypeId for a single sample from the channel.
+    /// Gets the `TypeId` for a single sample from the channel.
     ///
-    /// This will get the TypeId for a sample if it can fit into a standard
+    /// This will get the `TypeId` for a sample if it can fit into a standard
     /// integer type, signed or unsigned, of 8, 16, 32, or 64 bits.
     pub fn type_of(&self) -> Option<TypeId> {
         let nbytes = self.byte_length();
@@ -297,7 +297,7 @@ impl Channel {
         let attr = CStr::from_ptr(attr).to_string_lossy().to_string();
         // TODO: We could/should check val[len-1] == '\x0'
         let val = CStr::from_ptr(val).to_string_lossy().to_string();
-        let map: &mut HashMap<String, String> = &mut *(pmap as *mut _);
+        let map: &mut HashMap<String, String> = &mut *pmap.cast();
         map.insert(attr, val);
         0
     }
@@ -307,7 +307,7 @@ impl Channel {
     /// retrieve all the attributes with a single call.
     pub fn attr_read_all(&self) -> Result<HashMap<String, String>> {
         let mut map = HashMap::new();
-        let pmap = &mut map as *mut _ as *mut c_void;
+        let pmap = (&mut map as *mut HashMap<_, _>).cast();
         let ret = unsafe {
             ffi::iio_channel_attr_read_all(self.chan, Some(Channel::attr_read_all_cb), pmap)
         };
@@ -397,9 +397,9 @@ impl Channel {
         }
     }
 
-    /// Gets the TypeId for a single sample from the channel.
+    /// Gets the `TypeId` for a single sample from the channel.
     ///
-    /// This will get the TypeId for a sample if it can fit into a standard
+    /// This will get the `TypeId` for a sample if it can fit into a standard
     /// integer type, signed or unsigned, of 8, 16, 32, or 64 bits.
     pub fn type_of(&self) -> Option<TypeId> {
         let dfmt = self.data_format();
@@ -429,8 +429,8 @@ impl Channel {
             unsafe {
                 ffi::iio_channel_convert(
                     self.chan,
-                    &mut retval as *mut T as *mut c_void,
-                    &val as *const T as *const c_void,
+                    (&mut retval as *mut T).cast(),
+                    (&val as *const T).cast(),
                 );
             }
         }
@@ -451,8 +451,8 @@ impl Channel {
             unsafe {
                 ffi::iio_channel_convert_inverse(
                     self.chan,
-                    &mut retval as *mut T as *mut c_void,
-                    &val as *const T as *const c_void,
+                    (&mut retval as *mut T).cast(),
+                    (&val as *const T).cast(),
                 );
             }
         }
@@ -473,9 +473,7 @@ impl Channel {
         let sz_in = n * sz_item;
 
         let mut v = vec![T::default(); n];
-        let sz = unsafe {
-            ffi::iio_channel_read(self.chan, buf.buf, v.as_mut_ptr() as *mut c_void, sz_in)
-        };
+        let sz = unsafe { ffi::iio_channel_read(self.chan, buf.buf, v.as_mut_ptr().cast(), sz_in) };
 
         if sz > sz_in {
             return Err(Error::BadReturnSize); // This should never happen.
@@ -501,9 +499,8 @@ impl Channel {
         let sz_in = n * sz_item;
 
         let mut v = vec![T::default(); n];
-        let sz = unsafe {
-            ffi::iio_channel_read_raw(self.chan, buf.buf, v.as_mut_ptr() as *mut c_void, sz_in)
-        };
+        let sz =
+            unsafe { ffi::iio_channel_read_raw(self.chan, buf.buf, v.as_mut_ptr().cast(), sz_in) };
 
         if sz > sz_in {
             return Err(Error::BadReturnSize); // This should never happen.
@@ -528,9 +525,7 @@ impl Channel {
         let sz_item = mem::size_of::<T>();
         let sz_in = data.len() * sz_item;
 
-        let sz = unsafe {
-            ffi::iio_channel_write(self.chan, buf.buf, data.as_ptr() as *const c_void, sz_in)
-        };
+        let sz = unsafe { ffi::iio_channel_write(self.chan, buf.buf, data.as_ptr().cast(), sz_in) };
 
         Ok(sz / sz_item)
     }
@@ -548,9 +543,7 @@ impl Channel {
         let sz_item = mem::size_of::<T>();
         let sz_in = data.len() * sz_item;
 
-        let sz = unsafe {
-            ffi::iio_channel_write(self.chan, buf.buf, data.as_ptr() as *const c_void, sz_in)
-        };
+        let sz = unsafe { ffi::iio_channel_write(self.chan, buf.buf, data.as_ptr().cast(), sz_in) };
 
         Ok(sz / sz_item)
     }

src/context.rs

@@ -26,8 +26,8 @@ use std::{
 /// Sync.
 ///
 /// This object maintains a reference counted pointer to the context object
-/// of the underlying library's iio_context object. Once all references to
-/// the Context object have been dropped, the underlying iio_context will be
+/// of the underlying library's `iio_context` object. Once all references to
+/// the Context object have been dropped, the underlying `iio_context` will be
 /// destroyed. This is done to make creation and use of a single Device more
 /// ergonomic by removing the need to manage the lifetime of the Context.
 #[derive(Debug, Clone)]
@@ -116,9 +116,11 @@ impl InnerContext {
     /// This should be called _right after_ creating the C context as it
     /// will use the last error on failure.
     fn new(ctx: *mut ffi::iio_context) -> Result<Self> {
-        match ctx.is_null() {
-            true => Err(Error::from(Errno::last())),
-            false => Ok(Self { ctx }),
+        if ctx.is_null() {
+            Err(Error::from(Errno::last()))
+        }
+        else {
+            Ok(Self { ctx })
         }
     }
 
@@ -153,12 +155,12 @@ impl Context {
     ///
     /// # Notes
     ///
-    /// This will create a network context if the IIOD_REMOTE
+    /// This will create a network context if the `IIOD_REMOTE`
     /// environment variable is set to the hostname where the IIOD server
     /// runs. If set to an empty string, the server will be discovered using
-    /// ZeroConf. If the environment variable is not set, a local context
+    /// `ZeroConf`. If the environment variable is not set, a local context
     /// will be created instead.
-    pub fn new() -> Result<Context> {
+    pub fn new() -> Result<Self> {
         Self::from_ptr(unsafe { ffi::iio_create_default_context() })
     }
 
@@ -200,7 +202,7 @@ impl Context {
     ///
     /// let ctx = iio::Context::with_backend(iio::Backend::Uri("ip:192.168.2.1"));
     /// ```
-    pub fn with_backend(be: Backend) -> Result<Context> {
+    pub fn with_backend(be: Backend) -> Result<Self> {
         Self::from_ptr(unsafe {
             match be {
                 Backend::Default => ffi::iio_create_default_context(),
@@ -264,15 +266,15 @@ impl Context {
     /// This attempts to release and return the [`InnerContext`], which
     /// succeeds if this is the only [`Context`] referring to it. If there are
     /// other references, an error is returned with a [`Context`].
-    pub fn try_release_inner(self) -> std::result::Result<InnerContext, Context> {
+    pub fn try_release_inner(self) -> std::result::Result<InnerContext, Self> {
         match Arc::try_unwrap(self.inner) {
             Ok(inner) => Ok(inner),
-            Err(inner_ptr) => Err(Context { inner: inner_ptr }),
+            Err(inner_ptr) => Err(Self { inner: inner_ptr }),
         }
     }
 
     /// Make a new context based on a full copy of underlying C context.
-    pub fn try_deep_clone(&self) -> Result<Context> {
+    pub fn try_deep_clone(&self) -> Result<Self> {
         let inner = self.inner.try_clone()?;
         Ok(Self {
             inner: Arc::new(inner),
@@ -298,7 +300,7 @@ impl Context {
         let mut minor: c_uint = 0;
 
         const BUF_SZ: usize = 8;
-        let mut buf = vec![' ' as c_char; BUF_SZ];
+        let mut buf = vec![b' ' as c_char; BUF_SZ];
         let pbuf = buf.as_mut_ptr();
 
         unsafe { ffi::iio_context_get_version(self.inner.ctx, &mut major, &mut minor, pbuf) };
@@ -308,7 +310,7 @@ impl Context {
                 CStr::from_ptr(pbuf).to_owned()
             }
             else {
-                let slc = str::from_utf8(slice::from_raw_parts(pbuf as *mut u8, BUF_SZ)).unwrap();
+                let slc = str::from_utf8(slice::from_raw_parts(pbuf.cast(), BUF_SZ)).unwrap();
                 CString::new(slc).unwrap()
             }
         };
@@ -428,7 +430,7 @@ impl Context {
 impl PartialEq for Context {
     /// Two contexts are the same if they refer to the same underlying
     /// object in the library.
-    fn eq(&self, other: &Context) -> bool {
+    fn eq(&self, other: &Self) -> bool {
         self.inner.ctx == other.inner.ctx
     }
 }

src/device.rs

@@ -16,7 +16,7 @@ use nix::errno::Errno;
 use std::{
     collections::HashMap,
     ffi::CString,
-    os::raw::{c_char, c_longlong, c_uint, c_void},
+    os::raw::{c_char, c_longlong, c_uint},
     ptr,
 };
 
@@ -68,7 +68,7 @@ impl Device {
 
     /// Associate a trigger for this device.
     /// `trigger` The device to be used as a trigger.
-    pub fn set_trigger(&self, trigger: &Device) -> Result<()> {
+    pub fn set_trigger(&self, trigger: &Self) -> Result<()> {
         let ret = unsafe { ffi::iio_device_set_trigger(self.dev, trigger.dev) };
         sys_result(ret, ())
     }
@@ -172,7 +172,7 @@ impl Device {
     /// retrieve all the attributes with a single call.
     pub fn attr_read_all(&self) -> Result<HashMap<String, String>> {
         let mut map = HashMap::new();
-        let pmap = &mut map as *mut _ as *mut c_void;
+        let pmap = (&mut map as *mut HashMap<_, _>).cast();
         let ret = unsafe { ffi::iio_device_attr_read_all(self.dev, Some(attr_read_all_cb), pmap) };
         sys_result(ret, map)
     }
@@ -320,7 +320,7 @@ unsafe impl Send for Device {}
 impl PartialEq for Device {
     /// Two devices are the same if they refer to the same underlying
     /// object in the library.
-    fn eq(&self, other: &Device) -> bool {
+    fn eq(&self, other: &Self) -> bool {
         self.dev == other.dev
     }
 }

src/lib.rs

@@ -121,8 +121,8 @@ impl ToAttribute for bool {
 }
 
 impl FromAttribute for bool {
-    fn from_attr(s: &str) -> Result<bool> {
-        Ok(if s.trim() == "0" { false } else { true })
+    fn from_attr(s: &str) -> Result<Self> {
+        Ok(s.trim() != "0")
     }
 }
 
@@ -163,7 +163,7 @@ pub(crate) unsafe extern "C" fn attr_read_all_cb(
     let attr = CStr::from_ptr(attr).to_string_lossy().to_string();
     // TODO: We could/should check val[len-1] == '\x0'
     let val = CStr::from_ptr(val).to_string_lossy().to_string();
-    let map: &mut HashMap<String, String> = &mut *(pmap as *mut _);
+    let map: &mut HashMap<String, String> = &mut *pmap.cast();
     map.insert(attr, val);
     0
 }
@@ -205,7 +205,7 @@ pub fn library_version() -> Version {
             CStr::from_ptr(pbuf).to_owned()
         }
         else {
-            let slc = str::from_utf8(slice::from_raw_parts(pbuf as *mut u8, BUF_SZ)).unwrap();
+            let slc = str::from_utf8(slice::from_raw_parts(pbuf.cast(), BUF_SZ)).unwrap();
             CString::new(slc).unwrap()
         }
     };