update parser

test/simple/main.air

@@ -1,9 +1,44 @@
+; declare a module
 module main
 
-c : fn => bool = function is
-  let a = b in
-  c(a)
+; no explicit export so everything in this module is exported
+export one, two
 
-b : bool = false
+; no import
+import a
+import a only name, name
+import a as change_name
 
-a : number = 1
+; declare a variable
+one : number = 1
+
+; declare a variable that is computed
+; places a burden on the runtime
+two : number = one + 1
+
+; tt : bool = true
+
+; types can be named, alias
+
+; using tuple or record or enum
+type coordinates_tuple = tuple (number, number)
+; type coordinates_record = record { x : number , y : number }
+
+coordinates_as_tuple : coordinates_tuple = tuple (1, 2)
+; coordinates_as_record : coordinates_record = record { x : 1 , y : 2 }
+
+; function definition is structured the same
+void : fn => number = function is
+  let x = 1 in
+  1
+
+return_false : fn => bool = function is
+  false
+
+increment : fn number => number = function x is
+  x + 1
+
+is_even : fn number => bool = function x is
+  if x % 2 then true else false
+
+bruh : number = increment(one)