Lg/rust tab block

modules/developers-guide/examples/lib.rs

@@ -0,0 +1,27 @@
+use ic_cdk_macros::*;
+
+static mut COUNTER: u32 = 0;
+
+#[query]
+fn read() -> u32 {
+    unsafe {
+        ic_cdk::print(format!("read {}", COUNTER));
+        COUNTER
+    }
+}
+
+#[update]
+fn inc() -> () {
+    unsafe {
+        ic_cdk::print(format!("inc {} + 1", COUNTER));
+        COUNTER = COUNTER + 1;
+    }
+}
+
+#[update]
+fn write(input: u32) -> () {
+    unsafe {
+        ic_cdk::print(format!("write {} := {}", COUNTER, input));
+        COUNTER = input;
+    }
+}

modules/developers-guide/pages/tutorials/counter-tutorial.adoc

@@ -126,13 +126,20 @@ To modify the default template source code:
 . Open the `+src/my_counter/increment_counter.mo+` file in a text editor and delete the existing content.
 . Copy and paste the following sample code into the `+increment_counter.mo+` file:
 +
-[source,motoko]
+[tabs]
+====
+Motoko::
++
+[source,motoko,indent=0]
 ----
 include::example$counter.mo[]
 ----
+Rust::
 +
-Note that the variable declaration in this example includes the `+stable+` keyword to indicate the state—the value that can be set, incremented, and retrieved—persists.
-For more information about stable and flexible variables, see the _{proglang} Programming Language Guide_.
+[source,rust]
+----
+include::example$lib.rs[]
+----
 . Save your changes and close the file to continue.
 
 == Start the local network