From a37b87166cda5ee5130201c3d1979f63001267bc Mon Sep 17 00:00:00 2001
From: Joshua Moerman <lakseru@gmail.com>
Date: Wed, 18 Nov 2020 20:10:23 +0100
Subject: [PATCH] initial commit

---
 .gitignore   |  6 ++++++
 Cargo.toml   | 34 ++++++++++++++++++++++++++++++++++
 src/lib.rs   | 19 +++++++++++++++++++
 src/utils.rs | 10 ++++++++++
 tests/web.rs | 13 +++++++++++++
 5 files changed, 82 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Cargo.toml
 create mode 100644 src/lib.rs
 create mode 100644 src/utils.rs
 create mode 100644 tests/web.rs

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..4e30131
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,6 @@
+/target
+**/*.rs.bk
+Cargo.lock
+bin/
+pkg/
+wasm-pack.log
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..a39543b
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,34 @@
+[package]
+name = "rust-wasm"
+version = "0.1.0"
+authors = ["Joshua Moerman"]
+edition = "2018"
+
+[lib]
+crate-type = ["cdylib", "rlib"]
+
+[features]
+default = ["console_error_panic_hook"]
+
+[dependencies]
+wasm-bindgen = "0.2.63"
+
+# The `console_error_panic_hook` crate provides better debugging of panics by
+# logging them with `console.error`. This is great for development, but requires
+# all the `std::fmt` and `std::panicking` infrastructure, so isn't great for
+# code size when deploying.
+console_error_panic_hook = { version = "0.1.6", optional = true }
+
+# `wee_alloc` is a tiny allocator for wasm that is only ~1K in code size
+# compared to the default allocator's ~10K. It is slower than the default
+# allocator, however.
+#
+# Unfortunately, `wee_alloc` requires nightly Rust when targeting wasm for now.
+wee_alloc = { version = "0.4.5", optional = true }
+
+[dev-dependencies]
+wasm-bindgen-test = "0.3.13"
+
+[profile.release]
+# Tell `rustc` to optimize for small code size.
+opt-level = "s"
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..9c53526
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,19 @@
+mod utils;
+
+use wasm_bindgen::prelude::*;
+
+// When the `wee_alloc` feature is enabled, use `wee_alloc` as the global
+// allocator.
+#[cfg(feature = "wee_alloc")]
+#[global_allocator]
+static ALLOC: wee_alloc::WeeAlloc = wee_alloc::WeeAlloc::INIT;
+
+#[wasm_bindgen]
+extern {
+    fn alert(s: &str);
+}
+
+#[wasm_bindgen]
+pub fn greet() {
+    alert("Hello, rust-wasm!");
+}
diff --git a/src/utils.rs b/src/utils.rs
new file mode 100644
index 0000000..b1d7929
--- /dev/null
+++ b/src/utils.rs
@@ -0,0 +1,10 @@
+pub fn set_panic_hook() {
+    // When the `console_error_panic_hook` feature is enabled, we can call the
+    // `set_panic_hook` function at least once during initialization, and then
+    // we will get better error messages if our code ever panics.
+    //
+    // For more details see
+    // https://github.com/rustwasm/console_error_panic_hook#readme
+    #[cfg(feature = "console_error_panic_hook")]
+    console_error_panic_hook::set_once();
+}
diff --git a/tests/web.rs b/tests/web.rs
new file mode 100644
index 0000000..de5c1da
--- /dev/null
+++ b/tests/web.rs
@@ -0,0 +1,13 @@
+//! Test suite for the Web and headless browsers.
+
+#![cfg(target_arch = "wasm32")]
+
+extern crate wasm_bindgen_test;
+use wasm_bindgen_test::*;
+
+wasm_bindgen_test_configure!(run_in_browser);
+
+#[wasm_bindgen_test]
+fn pass() {
+    assert_eq!(1 + 1, 2);
+}