add more examples

examples/custom-types.jt

@@ -0,0 +1,11 @@
+import io
+
+// you can create your own types with 'type'
+type T = int
+
+fn main () {
+    T a = 2
+
+    // since T is int, io.puts with an int works
+    io.puts(a)
+}

examples/function-overload.jt

@@ -0,0 +1,16 @@
+import io
+import integer
+
+fn my_puts(string str) {
+    io.puts(str)
+}
+
+fn my_puts(int my_int) {
+    io.puts(integer.to_str(my_int))
+}
+
+fn main () {
+    my_puts(2)
+    my_puts("aaa")
+}
+

examples/hello.jt

@@ -1,5 +1,6 @@
 import io
 
-fn main () {
-    io.shit("pant")
+fn main () -> int {
+    io.puts("pant")
+    ret 0
 }

examples/higher-order-functions.jt

@@ -0,0 +1,26 @@
+import io
+
+// takes a function that receives two ints, returns an int
+// Func is the function type keyword, to not switch it with fn (which declares
+// a function)
+fn function_tester (Func function ([int, int] -> int)) -> int {
+    func(2, 2)
+}
+
+fn add(int a, int b) -> int {
+    a + b
+}
+
+fn main () {
+    // passes the function add to function_tester
+    res := function_tester(add)
+
+    // you can also create functions and put them in variables. not putting a
+    // function name on the fn block makes it return a Func instance to be put
+    // in a variable
+    anonymous := (fn () {})
+
+    // anonymous has type Func ([] -> void)
+
+    io.puts("res = {res}")
+}

examples/strings.jt

@@ -0,0 +1,15 @@
+import io
+
+fn main () {
+    s := "this is a string"
+    io.puts(s)
+
+    s := "this is {s}"
+    io.puts(s)
+
+    s + 2 // invalid
+
+    // this however, is valid, there is an io.puts that handles int,
+    // more on function overload in a bit
+    io.puts(2)
+}

examples/structs.jt

@@ -0,0 +1,14 @@
+import io
+
+struct MyStruct {
+    int var1,
+    int var2,
+    int var3
+}
+
+fn main () {
+    st = MyStruct{1, 2, 3}
+
+    // TODO: define a way for printable things
+    io.puts(st)
+}