obj-rs: Derive more std traits

Reference:
  https://rust-lang.github.io/api-guidelines/interoperability.html

obj-rs/src/error.rs

@@ -78,7 +78,7 @@ impl LoadError {
 }
 
 /// Enum to store the various types of errors that can cause loading an OBJ to fail.
-#[derive(Copy, PartialEq, Eq, Clone, Debug)]
+#[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
 pub enum LoadErrorKind {
     /// Met unexpected statement.
     UnexpectedStatement,

obj-rs/src/lib.rs

@@ -53,7 +53,7 @@ pub fn load_obj<V: FromRawVertex<I>, T: BufRead, I>(input: T) -> ObjResult<Obj<V
 }
 
 /// 3D model object loaded from wavefront OBJ.
-#[derive(Debug, Clone)]
+#[derive(Clone, Eq, PartialEq, Hash, Debug, Default)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct Obj<V = Vertex, I = u16> {
     /// Object's name.

obj-rs/src/raw/lexer.rs

@@ -25,6 +25,7 @@ fn test_strip_commect() {
 
 type StrippedLines<T> = Map<Lines<T>, fn(Result<String>) -> Result<String>>;
 
+#[derive(Debug)]
 pub struct Lexer<T> {
     stripped_lines: StrippedLines<T>,
 }

obj-rs/src/raw/material.rs

@@ -126,7 +126,7 @@ fn parse_texture_map(args: &[&str]) -> ObjResult<MtlTextureMap> {
 }
 
 /// Low-level Rust binding for `.mtl` format *(incomplete)*.
-#[derive(Clone, Debug)]
+#[derive(Clone, PartialEq, Debug, Default)]
 pub struct RawMtl {
     /// Map from the material name to its properties
     pub materials: HashMap<String, Material>,

obj-rs/src/raw/object.rs

@@ -465,7 +465,7 @@ impl Group {
 }
 
 /// Low-level Rust binding for `.obj` format.
-#[derive(Clone, Debug)]
+#[derive(Clone, PartialEq, Debug, Default)]
 pub struct RawObj {
     /// Name of the object.
     pub name: Option<String>,
@@ -502,7 +502,7 @@ pub struct RawObj {
 pub type Point = usize;
 
 /// The `Line` type.
-#[derive(PartialEq, Eq, Clone, Debug)]
+#[derive(Clone, Eq, PartialEq, Hash, Debug)]
 pub enum Line {
     /// A series of line segments which contain only the position data of each vertex
     P(Vec<usize>),
@@ -512,7 +512,7 @@ pub enum Line {
 }
 
 /// The `Polygon` type.
-#[derive(PartialEq, Eq, Clone, Debug)]
+#[derive(Clone, Eq, PartialEq, Hash, Debug)]
 pub enum Polygon {
     /// A polygon which contains only the position data of each vertex.
     P(Vec<usize>),
@@ -525,7 +525,7 @@ pub enum Polygon {
 }
 
 /// A group which contains ranges of points, lines and polygons
-#[derive(Clone, Debug)]
+#[derive(Clone, Eq, PartialEq, Hash, Debug, Default)]
 pub struct Group {
     /// Multiple range of points
     pub points: Vec<Range>,
@@ -536,7 +536,7 @@ pub struct Group {
 }
 
 /// A struct which represent `[start, end)` range.
-#[derive(Copy, PartialEq, Eq, Clone, Debug)]
+#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash, Debug, Default)]
 pub struct Range {
     /// The lower bound of the range (inclusive).
     pub start: usize,