Clippy fixes

Update .gitignore

.gitignore

@@ -1,3 +1,4 @@
+.vscode
 /target
 Cargo.lock
 book/book

calculator/src/compiler/interpreter.rs

@@ -29,15 +29,15 @@ impl Eval {
         match node {
             Node::Int(n) => *n,
             Node::UnaryExpr { op, child } => {
-                let child = self.eval(&child);
+                let child = self.eval(child);
                 match op {
                     Operator::Plus => child,
                     Operator::Minus => -child,
                 }
             }
             Node::BinaryExpr { op, lhs, rhs } => {
-                let lhs_ret = self.eval(&lhs);
-                let rhs_ret = self.eval(&rhs);
+                let lhs_ret = self.eval(lhs);
+                let rhs_ret = self.eval(rhs);
 
                 match op {
                     Operator::Plus => lhs_ret + rhs_ret,

calculator/src/compiler/jit.rs

@@ -64,15 +64,15 @@ impl<'a> RecursiveBuilder<'a> {
         match ast {
             Node::Int(n) => self.i32_type.const_int(*n as u64, true),
             Node::UnaryExpr { op, child } => {
-                let child = self.build(&child);
+                let child = self.build(child);
                 match op {
                     Operator::Minus => child.const_neg(),
                     Operator::Plus => child,
                 }
             }
             Node::BinaryExpr { op, lhs, rhs } => {
-                let left = self.build(&lhs);
-                let right = self.build(&rhs);
+                let left = self.build(lhs);
+                let right = self.build(rhs);
 
                 match op {
                     Operator::Plus => self.builder.build_int_add(left, right, "plus_temp"),

calculator/src/main.rs

@@ -13,7 +13,7 @@ cfg_if! {
 fn main() {
     let args: Vec<String> = std::env::args().collect();
     if args.len() < 2 {
-        eprintln!("Not input file was provided");
+        eprintln!("No input file was provided");
         std::process::exit(-1);
     }
     println!(

calculator/src/parser.rs

@@ -1,3 +1,5 @@
+#![allow(clippy::upper_case_acronyms)]
+
 use pest::{self, Parser};
 
 use crate::ast::{Node, Operator};
@@ -50,7 +52,7 @@ fn build_ast_from_term(pair: pest::iterators::Pair<Rule>) -> Node {
             let istr = pair.as_str();
             let (sign, istr) = match &istr[..1] {
                 "-" => (-1, &istr[1..]),
-                _ => (1, &istr[..]),
+                _ => (1, istr),
             };
             let int: i32 = istr.parse().unwrap();
             Node::Int(sign * int)