Add parser

src/lexer.rs

@@ -0,0 +1,20 @@
+use crate::opcodes::OpCode;
+
+pub fn lex(input: &str) -> Vec<OpCode> {
+  let mut tokens: Vec<OpCode> = Vec::new();
+  for (_, character) in input.chars().enumerate() {
+    match character {
+      '+' => tokens.push(OpCode::Increment),
+      '-' => tokens.push(OpCode::Decrement),
+      '>' => tokens.push(OpCode::MoveRight),
+      '<' => tokens.push(OpCode::MoveLeft),
+      '.' => tokens.push(OpCode::Print),
+      ',' => tokens.push(OpCode::Read),
+      '[' => tokens.push(OpCode::LoopStart),
+      ']' => tokens.push(OpCode::LoopEnd),
+      _ => (),
+    }
+  }
+
+  tokens
+}

src/main.rs

@@ -1,3 +1,10 @@
+mod lexer;
+mod opcodes;
+use opcodes::OpCode;
+
 fn main() {
-    println!("Hello, world!");
+    let tokens: Vec<OpCode> = lexer::lex("++++++   [ > ++++++++++ < - ] > +++++ .");
+    for token in tokens {
+        println!("{:?}", token);
+    }
 }

src/opcodes.rs

@@ -0,0 +1,11 @@
+#[derive(Debug)]
+pub enum OpCode {
+  Increment,
+  Decrement,
+  MoveRight,
+  MoveLeft,
+  Print,
+  Read,
+  LoopStart,
+  LoopEnd,
+}