Attemt wasm

Cargo.toml

@@ -18,6 +18,9 @@ categories = [
     "value-formatting",
 ]
 
+[workspace]
+members = ["wasm"]
+
 [dependencies]
 decimal = { version = "2.1", default-features = false, features = [
     "serde",

src/units.rs

@@ -69,14 +69,14 @@ macro_rules! create_units {
 					),*
 				}
 			}
-			pub(crate) fn singular(&self) -> &str {
+			pub fn singular(&self) -> &str {
 				match self {
 					$(
 						Unit::$variant => $properties.2
 					),*
 				}
 			}
-			pub(crate) fn plural(&self) -> &str {
+			pub fn plural(&self) -> &str {
 				match self {
 					$(
 						Unit::$variant => $properties.3

wasm/Cargo.toml

@@ -0,0 +1,20 @@
+[package]
+name = "cpc-wasm"
+edition = "2021"
+publish = false
+
+[lib]
+crate-type = ["cdylib"]
+
+[dependencies]
+cpc = { path = "../" }
+decimal = { version = "2.1", default-features = false, features = [
+    "serde",
+    "ord_subset",
+] }
+serde = { version = "1.0", features = ["derive"] }
+serde-wasm-bindgen = "0.6"
+wasm-bindgen = "0.2"
+
+[package.metadata.wasm-pack.profile.release]
+wasm-opt = ["-Oz"]

wasm/src/lib.rs

@@ -0,0 +1,32 @@
+use decimal::d128;
+use serde::Serialize;
+use wasm_bindgen::prelude::*;
+
+#[derive(Serialize)]
+pub struct NumberWasm {
+	pub value: String,
+	pub quantity: String,
+	pub unit: String,
+}
+
+#[wasm_bindgen]
+pub fn eval_wasm(input: &str) -> Result<JsValue, String> {
+	let number = cpc::eval(input, true, false)?;
+	// 0.2/0.01 results in 2E+1, but if we add zero it becomes 20
+	let quantity = number.value + d128!(0);
+	let word = match quantity == d128!(1) {
+		true => number.unit.singular(),
+		false => number.unit.plural(),
+	};
+	let output_text = match word {
+		"" => format!("{quantity}"),
+		_ => format!("{quantity} {word}"),
+	};
+	let number_wasm = NumberWasm {
+		value: output_text,
+		quantity: quantity.to_string(),
+		unit: word.into(),
+	};
+	let js_value = serde_wasm_bindgen::to_value(&number_wasm).unwrap();
+	Ok(js_value)
+}

web/.gitignore

@@ -0,0 +1,10 @@
+.DS_Store
+node_modules
+/build
+/.svelte-kit
+/package
+.env
+.env.*
+!.env.example
+vite.config.js.timestamp-*
+vite.config.ts.timestamp-*

web/.npmrc

@@ -0,0 +1 @@
+engine-strict=true

web/README.md

@@ -0,0 +1,38 @@
+# create-svelte
+
+Everything you need to build a Svelte project, powered by [`create-svelte`](https://github.com/sveltejs/kit/tree/main/packages/create-svelte).
+
+## Creating a project
+
+If you're seeing this, you've probably already done this step. Congrats!
+
+```bash
+# create a new project in the current directory
+npm create svelte@latest
+
+# create a new project in my-app
+npm create svelte@latest my-app
+```
+
+## Developing
+
+Once you've created a project and installed dependencies with `npm install` (or `pnpm install` or `yarn`), start a development server:
+
+```bash
+npm run dev
+
+# or start the server and open the app in a new browser tab
+npm run dev -- --open
+```
+
+## Building
+
+To create a production version of your app:
+
+```bash
+npm run build
+```
+
+You can preview the production build with `npm run preview`.
+
+> To deploy your app, you may need to install an [adapter](https://kit.svelte.dev/docs/adapters) for your target environment.