started work on lexer

tests/helloWorld.pla

@@ -1,2 +1,2 @@
 depend "io.pla"
-write("Hello, World!")
+print("Hello, World!")

tests/lexer.pla

@@ -0,0 +1,6 @@
+123
+0.456
+[]
+{}
+(1 + 3 * 2 ^ 4) % 2
+2 - 1

tests/types.pla

@@ -0,0 +1,18 @@
+depend "io.pla"
+
+enum Gender {
+	male,
+	female
+}
+
+struct Person {
+	name: String,
+	age: Int = 0,
+	speak: Func
+}
+
+speak = Func(sentence: String): Nil {
+	print(sentence)
+} 
+
+max: Person = {"Max", 17, }

tests/variables.pla

@@ -6,8 +6,10 @@ myBoolean: Bool = true
 myString: String = "Hello!\n"
 myList: List = [1, "hi", true, [1, 2, 3], 0.789]
 
-write(String(myInt))
-write(String(myDecimal))
-write(String(myBoolean))
-write(myString)
-write(String(myList))
+MY_CONSTANT: Const(String) = "foo bar"
+
+print(String(myInt))
+print(String(myDecimal))
+print(String(myBoolean))
+print(myString)
+print(String(myList))