Add curly braces

examples/hello_world.fx

@@ -0,0 +1,4 @@
+fn main() {
+    let message = "Hello World!"
+    print(message)
+}

examples/math.fx

@@ -0,0 +1,11 @@
+fn main() {
+    print(fib(10))
+}
+
+fn fib(n: int): int { 
+    if (n <= 1) {
+        return n
+    }
+
+    return fib(n-1) + fib(n-2)
+} 

src/lexer/mod.rs

@@ -59,6 +59,10 @@ pub enum TokenKind {
     SquareBraceOpen,
     /// "]"
     SquareBraceClose,
+    /// "{"
+    CurlyBracesOpen,
+    /// "}"
+    CurlyBracesClose,
     /// "\t"
     Tab,
     /// "\n"
@@ -159,6 +163,8 @@ impl Cursor<'_> {
             ')' => BraceClose,
             '[' => SquareBraceOpen,
             ']' => SquareBraceClose,
+            '{' => CurlyBracesOpen,
+            '}' => CurlyBracesClose,
             c if is_id_start(c) => {
                 let kind = self.identifier(c);
 

src/main.rs

@@ -1,9 +1,22 @@
+use lexer::TokenKind;
+use std::fs::File;
+use std::io::Read;
+
 mod lexer;
 mod parser;
 
-fn main() {
+fn main() -> std::io::Result<()> {
-    let tokens = lexer::tokenize(&"let x = 2");
+    let mut file = File::open("examples/hello_world.fx")?;
+    let mut contents = String::new();
+    file.read_to_string(&mut contents)?;
+
+    let tokens = lexer::tokenize(&contents);
     // let ast = parser::parse(tokens.into_iter());
 
-    println!("{:?}", tokens)
+    for token in tokens {
+        if token.kind != TokenKind::Whitespace && token.kind != TokenKind::CarriageReturn {
+            println!("{:?}", token);
+        }
+    }
+    Ok(())
 }