add casts to examples

examples/curl.zr

@@ -3,7 +3,7 @@ func main[argc: i64, argv: ptr] : i64
         io.println("ERROR: url is missing")
         return 1
 
-    let url: str = mem.read64(argv + 8)
+    let url: str = mem.read64(argv + 8) as str
 
     if str.len(url) <= 7
         io.println("ERROR: invalid url (Did you forget \"http://\"?)")
@@ -36,7 +36,7 @@ func main[argc: i64, argv: ptr] : i64
     req = str.concat(req, " HTTP/1.0\r\nHost: ")
     req = str.concat(req, host)
     req = str.concat(req, "\r\nConnection: close\r\n\r\n")
-    net.send(s, req, str.len(req))
+    net.send(s, req as ptr, str.len(req))
     mem.free(req)
 
     let header_buf: str = mem.alloc(8192)
@@ -45,7 +45,7 @@ func main[argc: i64, argv: ptr] : i64
     let end_index: i64 = -1
 
     while !found && header_size < 8192
-        let n: i64 = net.read(s, header_buf + header_size, 8192 - header_size)
+        let n: i64 = net.read(s, header_buf as ptr + header_size, 8192 - header_size)
         if n <= 0
             break
         let current_size: i64 = header_size + n
@@ -59,7 +59,7 @@ func main[argc: i64, argv: ptr] : i64
         header_size = current_size
 
     if end_index < header_size
-        io.print_sized(header_buf + end_index, header_size - end_index)
+        io.print_sized(header_buf as ptr + end_index, header_size as i64 - end_index)
     mem.free(header_buf)
 
     let buffer: ptr = mem.alloc(4096)

examples/puzzles/aoc2025_03.zr

@@ -25,7 +25,7 @@ func part2_rec[bank: str, start: i64, remaining: i64] : i64
     let len: i64 = str.len(bank)
 
     for i in (start)..(len-remaining+1)
-        let v: i64 = bank[i] - '0'
+        let v: i64 = (bank[i] - '0') as i64
         if v > largest
             largest = v
             largest_idx = i

examples/tcp_server.zr

@@ -2,7 +2,7 @@ func main[] : i64
     let s: i64 = must(net.listen?(net.pack_addr(127, 0, 0, 1), 8000))
 
     io.println("Listening on port 8000...")
-    let resp: str = mem.alloc(60000)
+    let resp: ptr = mem.alloc(60000)
     while true
         let conn: i64 = net.accept(s)
         if conn < 0

examples/udp_server.zr

@@ -1,5 +1,5 @@
 func main[] : i64
-    let s: i64 = must(net.udp_listen?(net.pack_addr(127, 0, 0, 1), 8000))
+    let s: net.UDPSocket = must(net.udp_listen?(net.pack_addr(127, 0, 0, 1), 8000))
 
     io.println("Listening on port 8000...")
     while true