adding macro functions

README.md

@@ -4,7 +4,7 @@ wazem
 Playing with client-side rust libraries for speedy types.
 
 * `wasm-pack`
-* `create-wasm-app`-bootstraoo dev server
+* `create-wasm-app`-start dev server
 
 ## Usage
 

src/lib.rs

@@ -10,6 +10,30 @@ macro_rules! log {
     }
 }
 
+macro_rules! expr_stringer {
+    // This macro takes an expression of type `expr` and prints
+    // it as a string along with its result.
+    // The `expr` designator is used for expressions.
+    ($expression:expr) => {
+        // `stringify!` will convert the expression *as it is* into a string.
+        format!("{:?} = {:?}", stringify!($expression), $expression)
+    };
+    ($expression:literal) => {
+        format!("{:?} = {:?}", $expression, "Nothing")
+    };
+}
+
+macro_rules! find_min {
+    // Base case:
+    ($x:expr) => ($x);
+    // `$x` followed by at least one `$y,`
+    ($x:expr, $($y:expr),+) => (
+        // Call `find_min!` on the tail `$y`
+        std::cmp::min($x, find_min!($($y),+))
+    )
+}
+
+
 // When the `wee_alloc` feature is enabled, use `wee_alloc` as the global
 // allocator.
 #[cfg(feature = "wee_alloc")]
@@ -26,7 +50,16 @@ pub fn greet() {
     alert("Hello, Wazem!");
 }
 
+#[wasm_bindgen]
+pub fn find_min() {
+    log!("Min (5): {}", find_min!(5u8));
+    log!("Min (5/9): {}", find_min!(5u8, 9u8));
+    log!("Min (10/6/9): {}", find_min!(10u8, 6u8, 9u8));
+}
+
 #[wasm_bindgen]
 pub fn test_log() {
     log!("Hello browser, Love Wazem!");
+    log!("{}", expr_stringer!(3 + 5));
+    log!("{}", expr_stringer!("a literal"));
 }

www/index.html

@@ -8,5 +8,6 @@
     <noscript>This page contains webassembly and javascript content, please enable javascript in your browser.</noscript>
     <script src="./bootstrap.js"></script>
     <button id="clickMe">Click ME!</button>
+    <button id="minButton">Minimum Finder</button>
   </body>
 </html>

www/index.js

@@ -2,9 +2,14 @@ import * as wasm from "wazem";
 
 wasm.test_log();
 document.getElementById("clickMe").onclick = OnButtonClick;
+document.getElementById("minButton").onclick = OnMinClick;
 
 export function OnButtonClick(){
     wasm.greet();
 }
 
+export function OnMinClick(){
+    wasm.find_min();
+}
+
 export default wasm;

www/package.json

@@ -27,7 +27,6 @@
   },
   "devDependencies": {
     "copy-webpack-plugin": "^5.1.2",
-    "wazem": "^0.1.0",
     "webpack": "^4.44.2",
     "webpack-cli": "^3.1.0",
     "webpack-dev-server": "^3.1.5"