src/backend.rs

@@ -1,28 +1,28 @@
 //! # The compiler backend: generation of machine code, both static and JIT.
-//! 
+//!
 //! This module is responsible for taking our intermediate representation from
 //! [`crate::ir`] and turning it into Cranelift and then into object code that
 //! can either be saved to disk or run in memory. Because the runtime functions
 //! for NGR are very closely tied to the compiler implentation, we also include
 //! information about these functions as part of the module.
-//! 
+//!
 //! ## Using the `Backend`
-//! 
+//!
 //! The backend of this compiler can be used in two modes: a static compilation
 //! mode, where the goal is to write the compiled object to disk and then link
 //! it later, and a JIT mode, where the goal is to write the compiled object to
 //! memory and then run it. Both modes use the same `Backend` object, because
 //! they share a lot of behaviors. However, you'll want to use different variants
 //! based on your goals:
-//! 
+//!
 //!   * Use `Backend<ObjectModule>`, constructed via [`Backend::object_file`],
 //!     if you want to compile to an object file on disk, which you're then going
 //!     to link to later.
 //!   * Use `Backend<JITModule>`, constructed via [`Backend::jit`], if you want
 //!     to do just-in-time compilation and are just going to run things immediately.
-//! 
+//!
 //! ## Working with Runtime Functions
-//! 
+//!
 //! For now, runtime functions are pretty easy to describe, because there's
 //! only one. In the future, though, the [`RuntimeFunctions`] object is there to
 //! help provide a clean interface to them all.
@@ -45,7 +45,7 @@ use target_lexicon::Triple;
 const EMPTY_DATUM: [u8; 8] = [0; 8];
 
 /// An object representing an active backend.
-/// 
+///
 /// Internally, this object holds a bunch of state useful for compiling one
 /// or more functions into an object file or memory. It can be passed around,
 /// but cannot currently be duplicated because some of that state is not
@@ -64,7 +64,7 @@ pub struct Backend<M: Module> {
 
 impl Backend<JITModule> {
     /// Create a new JIT backend for compiling NGR into memory.
-    /// 
+    ///
     /// The provided output buffer is not for the compiled code, but for the output
     /// of any `print` expressions that are evaluated. If set to `None`, the output
     /// will be written to `stdout` as per normal, but if a String buffer is provided,
@@ -95,7 +95,7 @@ impl Backend<JITModule> {
 
     /// Given a compiled function ID, get a pointer to where that function was written
     /// in memory.
-    /// 
+    ///
     /// The data at this pointer should not be mutated unless you really, really,
     /// really know what you're doing. It can be run by casting it into a Rust
     /// `fn() -> ()`, and then calling it from normal Rust.
@@ -106,7 +106,7 @@ impl Backend<JITModule> {
 
 impl Backend<ObjectModule> {
     /// Generate a backend for compiling into an object file for the given target.
-    /// 
+    ///
     /// This backend will generate a single output file per `Backend` object, although
     /// that file may have multiple functions defined within it. Data between those
     /// functions (in particular, strings) will be defined once and shared between
@@ -139,11 +139,11 @@ impl Backend<ObjectModule> {
 
 impl<M: Module> Backend<M> {
     /// Define a string within the current backend.
-    /// 
+    ///
     /// Note that this is a Cranelift [`DataId`], which then must be redeclared inside the
     /// context of any functions or data items that want to use it. That being said, the
     /// string value will be defined once in the file and then shared by all referencers.
-    /// 
+    ///
     /// This function will automatically add a null character (`'\0'`) to the end of the
     /// string, to ensure that strings are non-terminated for interactions with other
     /// languages.
@@ -163,7 +163,7 @@ impl<M: Module> Backend<M> {
     }
 
     /// Define a global variable within the current backend.
-    /// 
+    ///
     /// These variables can be shared between functions, and will be exported from the
     /// module itself as public data in the case of static compilation. There initial
     /// value will be null.
@@ -179,7 +179,7 @@ impl<M: Module> Backend<M> {
     }
 
     /// Get a pointer to the output buffer for `print`ing, or `null`.
-    /// 
+    ///
     /// As suggested, returns `null` in the case where the user has not provided an
     /// output buffer; it is your responsibility to check for this case and do
     /// something sensible.
@@ -192,7 +192,7 @@ impl<M: Module> Backend<M> {
     }
 
     /// Get any captured output `print`ed by the program during execution.
-    /// 
+    ///
     /// If an output buffer was not provided, or if the program has not done any
     /// printing, then this function will return an empty string.
     pub fn output(self) -> String {

src/compiler.rs

@@ -10,7 +10,7 @@ use pretty::termcolor::{ColorChoice, StandardStream};
 use target_lexicon::Triple;
 
 /// A high-level compiler for NGR programs.
-/// 
+///
 /// This object can be built once, and then re-used many times to build multiple
 /// files. For most users, the [`Default`] implementation should be sufficient;
 /// it will use `stderr` for warnings and errors, with default colors based on
@@ -62,17 +62,17 @@ impl Compiler {
 
     /// This is the actual meat of the compilation chain; we hide it from the user
     /// because the type is kind of unpleasant.
-    /// 
+    ///
     /// The weird error type comes from the fact that we can run into three types
     /// of result:
-    /// 
+    ///
     ///    * Fundamental errors, like an incorrectly formatted file or some
     ///      oddity with IO. These return `Err`.
     ///    * Validation errors, where we reject the program due to something
     ///      semantically wrong with them. These return `Ok(None)`.
     ///    * Success! In this case, we return `Ok(Some(...))`, where the bytes
     ///      returned is the contents of the compiled object file.
-    /// 
+    ///
     fn compile_internal(&mut self, input_file: &str) -> Result<Option<Vec<u8>>, CompilerError> {
         // Try to parse the file into our syntax AST. If we fail, emit the error
         // and then immediately return `None`.
@@ -111,7 +111,7 @@ impl Compiler {
     }
 
     /// Emit a diagnostic.
-    /// 
+    ///
     /// This is just a really handy shorthand we use elsewhere in the object, because
     /// there's a lot of boilerplate we'd like to skip.
     fn emit(&mut self, diagnostic: Diagnostic<usize>) {

src/eval.rs

@@ -1,5 +1,5 @@
 //! Helpful functions for evaluating NGR programs.
-//! 
+//!
 //! Look, this is a compiler, and so you might be asking why it has a bunch of
 //! stuff in it to help with writing interpreters. Well, the answer is simple:
 //! testing. It's really nice to know that if you start with a program that
@@ -9,15 +9,15 @@
 //! programs don't do 100% the same things in the same order, but you shouldn't
 //! be able to observe the difference ... at least, not without a stopwatch,
 //! memory profilers, etc.
-//! 
+//!
 //! The actual evaluators for our various syntaxes are hidden in `eval` functions
 //! of the various ASTs. It's nice to have them "next to" the syntax that way, so
 //! that we just edit stuff in one part of the source tree at a time. This module,
 //! then, just contains some things that are generally helpful across all the
 //! interpreters we've written.
-//! 
+//!
 //! In particular, this module helps with:
-//! 
+//!
 //!   * Defining a common error type -- [`EvalError`] -- that we can reasonably
 //!     compare. It's nice to compare errors, here, because we want to know that
 //!     if a program used to fail, it will still fail after we change it, and
@@ -45,7 +45,7 @@ pub use value::Value;
 use crate::backend::BackendError;
 
 /// All of the errors that can happen trying to evaluate an NGR program.
-/// 
+///
 /// This is yet another standard [`thiserror::Error`] type, but with the
 /// caveat that it implements [`PartialEq`] even though some of its
 /// constituent members don't. It does so through the very sketchy mechanism
@@ -102,17 +102,17 @@ impl PartialEq for EvalError {
             EvalError::Linker(a) => match other {
                 EvalError::Linker(b) => a == b,
                 _ => false,
-            }
+            },
 
             EvalError::ExitCode(a) => match other {
                 EvalError::ExitCode(b) => a == b,
                 _ => false,
-            }
+            },
 
             EvalError::RuntimeOutput(a) => match other {
                 EvalError::RuntimeOutput(b) => a == b,
                 _ => false,
-            }
+            },
         }
     }
 }

src/eval/env.rs

@@ -4,7 +4,7 @@ use std::sync::Arc;
 
 /// An evaluation environment, which maps variable names to their
 /// current values.
-/// 
+///
 /// One key difference between `EvalEnvironment` and `HashMap` is that
 /// `EvalEnvironment` uses an `extend` mechanism to add keys, rather
 /// than an `insert`. This difference allows you to add mappings for
@@ -20,7 +20,7 @@ enum EvalEnvInternal {
 }
 
 /// Errors that can happen when looking up a variable.
-/// 
+///
 /// This enumeration may be extended in the future, depending on if we
 /// get more subtle with our keys. But for now, this is just a handy
 /// way to make lookup failures be `thiserror::Error`s.
@@ -45,7 +45,7 @@ impl EvalEnvironment {
     }
 
     /// Extend the environment with a new mapping.
-    /// 
+    ///
     /// Note the types: the result of this method is a new `EvalEnvironment`,
     /// with its own lifetime, and the original environment is left unmodified.
     pub fn extend(&self, name: ArcIntern<String>, value: Value) -> Self {

src/eval/primop.rs

@@ -75,7 +75,7 @@ impl Value {
     }
 
     /// Calculate the result of running the given primitive on the given arguments.
-    /// 
+    ///
     /// This can cause errors in a whole mess of ways, so be careful about your
     /// inputs. For example, addition only works when the two values have the exact
     /// same type, so expect an error if you try to do so. In addition, this

src/eval/value.rs

@@ -1,7 +1,7 @@
 use std::fmt::Display;
 
 /// Values in the interpreter.
-/// 
+///
 /// Yes, this is yet another definition of a structure called `Value`, which
 /// are almost entirely identical. However, it's nice to have them separated
 /// by type so that we don't mix them up.

src/ir.rs

@@ -1,12 +1,12 @@
 //! The middle of the compiler: analysis, simplification, optimization.
-//! 
+//!
 //! For the moment, this module doesn't do much besides define an intermediate
 //! representation for NGR programs that is a little easier to work with then
 //! the structures we've built from the actual user syntax. For example, in the
 //! IR syntax, function calls are simplified so that all their arguments are
 //! either variables or constants, which can make reasoning about programs
 //! (and implicit temporary variables) quite a bit easier.
-//! 
+//!
 //! For the foreseeable future, this module will likely remain mostly empty
 //! besides definitions, as we'll likely want to focus on just processing /
 //! validating syntax, and then figuring out how to turn it into Cranelift

src/ir/ast.rs

@@ -7,17 +7,17 @@ use proptest::{
 };
 
 /// We're going to represent variables as interned strings.
-/// 
+///
 /// These should be fast enough for comparison that it's OK, since it's going to end up
 /// being pretty much the pointer to the string.
 type Variable = ArcIntern<String>;
 
 /// The representation of a program within our IR. For now, this is exactly one file.
-/// 
+///
 /// In addition, for the moment there's not really much of interest to hold here besides
 /// the list of statements read from the file. Order is important. In the future, you
 /// could imagine caching analysis information in this structure.
-/// 
+///
 /// `Program` implements both [`Pretty`] and [`Arbitrary`]. The former should be used
 /// to print the structure whenever possible, especially if you value your or your
 /// user's time. The latter is useful for testing that conversions of `Program` retain
@@ -63,15 +63,15 @@ impl Arbitrary for Program {
 }
 
 /// The representation of a statement in the language.
-/// 
+///
 /// For now, this is either a binding site (`x = 4`) or a print statement
 /// (`print x`). Someday, though, more!
-/// 
+///
 /// As with `Program`, this type implements [`Pretty`], which should
 /// be used to display the structure whenever possible. It does not
 /// implement [`Arbitrary`], though, mostly because it's slightly
 /// complicated to do so.
-/// 
+///
 #[derive(Debug)]
 pub enum Statement {
     Binding(Location, Variable, Expression),
@@ -100,11 +100,11 @@ where
 }
 
 /// The representation of an expression.
-/// 
+///
 /// Note that expressions, like everything else in this syntax tree,
 /// supports [`Pretty`], and it's strongly encouraged that you use
 /// that trait/module when printing these structures.
-/// 
+///
 /// Also, Expressions at this point in the compiler are explicitly
 /// defined so that they are *not* recursive. By this point, if an
 /// expression requires some other data (like, for example, invoking
@@ -148,7 +148,7 @@ where
 }
 
 /// A type representing the primitives allowed in the language.
-/// 
+///
 /// Having this as an enumeration avoids a lot of "this should not happen"
 /// cases, but might prove to be cumbersome in the future. If that happens,
 /// this may either become a more hierarchical enumeration, or we'll just
@@ -191,7 +191,7 @@ where
 }
 
 /// An expression that is always either a value or a reference.
-/// 
+///
 /// This is the type used to guarantee that we don't nest expressions
 /// at this level. Instead, expressions that take arguments take one
 /// of these, which can only be a constant or a reference.
@@ -227,7 +227,7 @@ impl From<ValueOrRef> for Expression {
 #[derive(Debug)]
 pub enum Value {
     /// A numerical constant.
-    /// 
+    ///
     /// The optional argument is the base that was used by the user to input
     /// the number. By retaining it, we can ensure that if we need to print the
     /// number back out, we can do so in the form that the user entered it.

src/ir/eval.rs

@@ -6,7 +6,7 @@ use super::{Primitive, ValueOrRef};
 impl Program {
     /// Evaluate the program, returning either an error or a string containing everything
     /// the program printed out.
-    /// 
+    ///
     /// The print outs will be newline separated, with one print out per line.
     pub fn eval(&self) -> Result<String, EvalError> {
         let mut env = EvalEnvironment::empty();

src/ir/strings.rs

@@ -4,7 +4,7 @@ use std::collections::HashSet;
 
 impl Program {
     /// Get the complete list of strings used within the program.
-    /// 
+    ///
     /// For the purposes of this function, strings are the variables used in
     /// `print` statements.
     pub fn strings(&self) -> HashSet<ArcIntern<String>> {

src/lib.rs

@@ -1,41 +1,41 @@
 //! # NGR (No Good Reason) Compiler
-//! 
+//!
 //! This is the top-level module for the NGR compiler; a compiler written
 //! in Rust for no good reason. I may eventually try to turn this into a
 //! basic guide for writing compilers, but for now it's a fairly silly
 //! (although complete) language and implementation, featuring:
-//! 
+//!
 //!   * Variable binding with basic arithmetic operators.
 //!   * The ability to print variable values.
-//! 
+//!
 //! I'll be extending this list into the future, with the eventual goal of
 //! being able to implement basic programming tasks with it. For example,
 //! I have a goal of eventually writing reasonably-clear
 //! [Advent of Code](https://adventofcode.com/) implementations with it.
-//! 
+//!
 //! Users of this as a library will want to choose their adventure based
 //! on how much they want to customize their experience; I've defaulted
 //! to providing the ability to see internals, rather than masking them,
 //! so folks can play with things as they see fit.
-//! 
+//!
 //! ## Easy Mode - Just Running a REPL or Compiler
-//! 
+//!
 //! For easiest use, you will want to use either the [`Compiler`] object
 //! or the [`REPL`] object.
-//! 
+//!
 //! As you might expect, the [`Compiler`] object builds a compiler, which
 //! can be re-used to compile as many files as you'd like. Right now,
 //! that's all it does. (TODO: Add a linker function to it.)
-//! 
+//!
 //! The [`REPL`] object implements the core of what you'll need to
 //! implement a just-in-time compiled read-eval-print loop. It will
 //! maintain variable state and make sure that variables are linked
 //! appropriately as the loop progresses.
-//! 
+//!
 //! ## Hard Mode - Looking at the individual passes
-//! 
+//!
 //! This compiler is broken into three core parts:
-//! 
+//!
 //!   1. The front-end / syntax engine. This portion of the compiler is
 //!      responsible for turning basic strings (or files) into a machine-
 //!      friendly abstract syntax tree. See the [`syntax`] module for
@@ -49,22 +49,22 @@
 //!      helps with either compiling them via JIT or statically compiling
 //!      them into a file. The [`backend`] module also contains information
 //!      about the runtime functions made available to the user.
-//! 
+//!
 //! ## Testing
-//! 
+//!
 //! Testing is a key focus of this effort. To that end, both the syntax
 //! tree used in the syntax module and the IR used in the middle of the
 //! compiler both implement `Arbitrary`, and are subject to property-based
 //! testing to make sure that various passes work properly.
-//! 
+//!
 //! In addition, to support basic equivalence testing, we include support
 //! for evaluating all expressions. The [`eval`] module provides some
 //! utility support for this work.
-//! 
-pub mod syntax;
-pub mod ir;
+//!
 pub mod backend;
 pub mod eval;
+pub mod ir;
+pub mod syntax;
 
 /// Implementation module for the high-level compiler.
 mod compiler;

src/repl.rs

@@ -10,11 +10,11 @@ use pretty::termcolor::{ColorChoice, StandardStream};
 use std::collections::HashMap;
 
 /// A high-level REPL helper for NGR.
-/// 
+///
 /// This object holds most of the state required to implement some
 /// form of interactive compiler for NGR; all you need to do is provide
 /// the actual user IO.
-/// 
+///
 /// For most console-based used cases, the [`Default`] implementation
 /// should be sufficient; it prints any warnings or errors to `stdout`,
 /// using a default color scheme that should work based on the terminal
@@ -62,7 +62,7 @@ impl From<REPLError> for Diagnostic<usize> {
 
 impl REPL {
     /// Construct a new REPL helper, using the given stream implementation and console configuration.
-    /// 
+    ///
     /// For most users, the [`Default::default`] implementation will be sufficient;
     /// it will use `stdout` and a default console configuration. But if you need to
     /// be more specific, this will help you provide more guidance to the REPL as it
@@ -79,7 +79,7 @@ impl REPL {
     }
 
     /// Emit a diagnostic to the configured console.
-    /// 
+    ///
     /// This is just a convenience function; there's a lot of boilerplate in printing
     /// diagnostics, and it was nice to pull it out into its own function.
     fn emit_diagnostic(
@@ -95,13 +95,13 @@ impl REPL {
     }
 
     /// Process a line of input, printing any problems or the results.
-    /// 
+    ///
     /// The line number argument is just for a modicum of source information, to
     /// provide to the user if some parsing or validation step fails. It can be
     /// changed to be any value you like that provides some insight into what
     /// failed, although it is probably a good idea for it to be different for
     /// every invocation of this function. (Not critical, but a good idea.)
-    /// 
+    ///
     /// Any warnings or errors generated in processing this command will be
     /// printed to the configured console. If there are no problems, the
     /// command will be compiled and then executed.
@@ -117,7 +117,7 @@ impl REPL {
     }
 
     /// The internal implementation, with a handy `Result` type.
-    /// 
+    ///
     /// All information from the documentation of `REPL::process_input` applies here,
     /// as well; this is the internal implementation of that function, which is
     /// differentiated by returning a `Result` type that is hidden from the user

src/syntax.rs

@@ -1,11 +1,11 @@
 //! NGR Parsing: Reading input, turning it into sense (or errors).
-//! 
+//!
 //! This module implement the front end of the compiler, which is responsible for
 //! reading in NGR syntax as a string, turning it into a series of reasonable Rust
 //! structures for us to manipulate, and doing some validation while it's at it.
-//! 
+//!
 //! The core flow for this work is:
-//! 
+//!
 //!   * Turning the string into a series of language-specific [`Token`]s.
 //!   * Taking those tokens, and computing a basic syntax tree from them,
 //!     using our parser ([`ProgramParser`] or [`StatementParser`], generated
@@ -15,12 +15,12 @@
 //!   * Simplifying the tree we have parsed, using the [`simplify`] module,
 //!     into something that's more easily turned into our [compiler internal
 //!     representation](super::ir).
-//! 
+//!
 //! In addition to all of this, we make sure that the structures defined in this
 //! module are all:
 //!
 //!   * Instances of [`Pretty`](::pretty::Pretty), so that you can print stuff back
-//!     out that can be read by a human. 
+//!     out that can be read by a human.
 //!   * Instances of [`Arbitrary`](proptest::prelude::Arbitrary), so they can be
 //!     used in `proptest`-based property testing. There are built-in tests in
 //!     the library, for example, to make sure that the pretty-printing round-trips.

src/syntax/location.rs

@@ -1,7 +1,7 @@
 use codespan_reporting::diagnostic::{Diagnostic, Label};
 
 /// A source location, for use in pointing users towards warnings and errors.
-/// 
+///
 /// Internally, locations are very tied to the `codespan_reporting` library,
 /// and the primary use of them is to serve as anchors within that library.
 #[derive(Clone, Debug, Eq, PartialEq)]
@@ -13,7 +13,7 @@ pub struct Location {
 impl Location {
     /// Generate a new `Location` from a file index and an offset from the
     /// start of the file.
-    /// 
+    ///
     /// The file index is based on the file database being used. See the
     /// `codespan_reporting::files::SimpleFiles::add` function, which is
     /// normally where we get this index.
@@ -22,7 +22,7 @@ impl Location {
     }
 
     /// Generate a `Location` for a completely manufactured bit of code.
-    /// 
+    ///
     /// Ideally, this is used only in testing, as any code we generate as
     /// part of the compiler should, theoretically, be tied to some actual
     /// location in the source code. That being said, this can be used in
@@ -36,10 +36,10 @@ impl Location {
 
     /// Generate a primary label for a [`Diagnostic`], based on this source
     /// location.
-    /// 
+    ///
     /// Note, this is just the [`Label`], you'll want to fill in the [`Diagnostic`]
     /// with a lot more information.
-    /// 
+    ///
     /// Primary labels are the things that are they key cause of the message.
     /// If, for example, it was an error to bind a variable named "x", and
     /// then have another binding of a variable named "x", the second one
@@ -52,10 +52,10 @@ impl Location {
 
     /// Generate a secondary label for a [`Diagnostic`], based on this source
     /// location.
-    /// 
+    ///
     /// Note, this is just the [`Label`], you'll want to fill in the [`Diagnostic`]
     /// with a lot more information.
-    /// 
+    ///
     /// Secondary labels are the things that are involved in the message, but
     /// aren't necessarily a problem in and of themselves. If, for example, it
     /// was an error to bind a variable named "x", and then have another binding
@@ -63,20 +63,20 @@ impl Location {
     /// label (because that's where the error actually happened), but you'd
     /// probably want to make the first location the secondary label to help
     /// users find it.
-     pub fn secondary_label(&self) -> Label<usize> {
+    pub fn secondary_label(&self) -> Label<usize> {
         Label::secondary(self.file_idx, self.offset..self.offset)
     }
 
     /// Given this location and another, generate a primary label that
     /// specifies the area between those two locations.
-    /// 
+    ///
     /// See [`Self::primary_label`] for some discussion of primary versus
     /// secondary labels. If the two locations are the same, this method does
     /// the exact same thing as [`Self::primary_label`]. If this item was
     /// generated by [`Self::manufactured`], it will act as if you'd called
     /// `primary_label` on the argument. Otherwise, it will generate the obvious
     /// span.
-    /// 
+    ///
     /// This function will return `None` only in the case that you provide
     /// labels from two different files, which it cannot sensibly handle.
     pub fn range_label(&self, end: &Location) -> Option<Label<usize>> {
@@ -96,7 +96,7 @@ impl Location {
     }
 
     /// Return an error diagnostic centered at this location.
-    /// 
+    ///
     /// Note that this [`Diagnostic`] will have no information associated with
     /// it other than that (a) there is an error, and (b) that the error is at
     /// this particular location. You'll need to extend it with actually useful
@@ -109,7 +109,7 @@ impl Location {
     }
 
     /// Return an error diagnostic centered at this location, with the given message.
-    /// 
+    ///
     /// This is much more useful than [`Self::error`], because it actually provides
     /// the user with some guidance. That being said, you still might want to add
     /// even more information to ut, using [`Diagnostic::with_labels`],

src/syntax/tokens.rs

@@ -6,28 +6,28 @@ use thiserror::Error;
 
 /// A single token of the input stream; used to help the parsing go down
 /// more easily.
-/// 
+///
 /// The key way to generate this structure is via the [`Logos`] trait.
 /// See the [`logos`] documentation for more information; we use the
 /// [`Token::lexer`] function internally.
-/// 
+///
 /// The first step in the compilation process is turning the raw string
 /// data (in UTF-8, which is its own joy) in to a sequence of more sensible
 /// tokens. Here, for example, we turn "x=5" into three tokens: a
 /// [`Token::Variable`] for "x", a [`Token::Equals`] for the "=", and
 /// then a [`Token::Number`] for the "5". Later on, we'll worry about
 /// making sense of those three tokens.
-/// 
+///
 /// For now, our list of tokens is relatively straightforward. We'll
 /// need/want to extend these later.
-/// 
+///
 /// The [`std::fmt::Display`] implementation for [`Token`] should
 /// round-trip; if you lex a string generated with the [`std::fmt::Display`]
 /// trait, you should get back the exact same token.
 #[derive(Logos, Clone, Debug, PartialEq, Eq)]
 pub enum Token {
     // Our first set of tokens are simple characters that we're
-    // going to use to structure NGR programs. 
+    // going to use to structure NGR programs.
     #[token("=")]
     Equals,
 
@@ -74,7 +74,7 @@ pub enum Token {
     #[regex(r"[ \t\r\n\f]+", logos::skip)]
     // this is an extremely simple version of comments, just line
     // comments. More complicated /* */ comments can be harder to
-    // implement, and didn't seem worth it at the time. 
+    // implement, and didn't seem worth it at the time.
     #[regex(r"//.*", logos::skip)]
     /// This token represents that some core error happened in lexing;
     /// possibly that something didn't match anything at all.