Init commit

.gitignore

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+/target

Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "calc"
+version = "0.1.0"

Cargo.toml

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+[package]
+name = "calc"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

shell.nix

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+{ pkgs ? import <nixpkgs> {} }: with pkgs; mkShell {
+  buildInputs = [
+    cargo
+    rustc
+    rust-analyzer
+    pkg-config
+  ];
+}

src/main.rs

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+use core::fmt;
+use std::io;
+use std::io::Write;
+
+fn main() {
+  let stdin = io::stdin();
+  let mut buffer = String::new();
+
+  loop {
+    print!("> ");
+    io::stdout().flush().unwrap();
+
+    stdin.read_line(&mut buffer).unwrap();
+
+    let tokens = tokenisator(&buffer);
+
+    buffer.clear();
+  }
+}
+
+fn tokenisator(task: &str) -> Vec<Token> {
+  let mut tokens = Vec::<Token>::new();
+  let chars: Vec<char> = task.chars().collect();
+  let mut pointer = 0;
+
+  while pointer < task.len() {
+    dbg!(pointer, task.len());
+
+    let c = chars[pointer];
+    match c {
+      '0' .. '9' => {
+        let mut end = pointer;
+        while end < task.len() {
+          let cur_c = chars[end];
+          if !cur_c.is_ascii_digit() {
+            break;
+          }
+          end += 1;
+        }
+        tokens.push(Token::Number(
+          task.get(pointer..end).unwrap().parse::<i32>().unwrap()
+        ));
+        pointer = end-1;
+      }
+      '+' => tokens.push(Token::Addition),
+      '-' => tokens.push(Token::Substruction),
+      '*' => tokens.push(Token::Multiplication),
+      '/' => tokens.push(Token::Division),
+      '(' => tokens.push(Token::BracketOpen),
+      ')' => tokens.push(Token::BracketClose),
+      _ => {}
+    }
+
+    pointer += 1;
+  }
+
+  println!("{}", task);
+
+  for t in &tokens {
+    println!("{:?}", t);
+  }
+
+  return tokens;
+}
+
+#[derive(Debug)]
+enum Token {
+  Number(i32),
+  Addition,
+  Substruction,
+  Multiplication,
+  Division,
+  BracketOpen,
+  BracketClose,
+}