Add greeter example

.gitignore

@@ -1,3 +1,3 @@
 target/
 .vscode/
-examples_out/
+examples_out/

examples/greeter.sb

@@ -0,0 +1,7 @@
+main :: () {
+    return greet("Garrit");
+}
+
+greet :: (name) {
+    return "Hello " + name;
+}

examples/hello_world.sb

@@ -1,4 +1,4 @@
-main :: (n) {
+main :: () {
-    return 2 * n;
+    return "Hello World";
 }
 

examples_out/out.asm

@@ -1,7 +0,0 @@
-
-        .globl main
-        main:
-        
-        .globl fib
-        fib:
-        

examples_out/out.js

@@ -1,4 +0,0 @@
-function main(n) {
-return 2 * n
-}
-console.log(main())

src/lexer/mod.rs

@@ -165,11 +165,17 @@ impl Cursor<'_> {
             '-' => Minus,
             '*' => Star,
             '/' => match self.first() {
-                '/' => self.comment(),
+                '/' => {
+                    self.bump();
+                    self.comment()
+                }
                 _ => Slash,
             },
             '=' => match self.first() {
-                '=' => Equals,
+                '=' => {
+                    self.bump();
+                    Equals
+                }
                 _ => Assign,
             },
             ':' => match self.first() {

src/main.rs

@@ -9,7 +9,7 @@ mod parser;
 mod util;
 
 fn main() -> Result<(), String> {
-    let mut file = File::open("examples/hello_world.sb").expect("Could not open file");
+    let mut file = File::open("examples/playground.sb").expect("Could not open file");
     let mut contents = String::new();
     file.read_to_string(&mut contents)
         .expect("Could not read file");