chore: add more examples, refactoring

Signed-off-by: Henry Gressmann <mail@henrygressmann.de>

1 files changed, 22 insertions, 0 deletions

diff --git a/examples/simple.rs b/examples/simple.rs
new file mode 100644
index 0000000..6f79c0f
--- /dev/null
+++ b/examples/simple.rs
@@ -0,0 +1,22 @@
+use color_eyre::eyre::Result;
+use tinywasm::{Module, Store};
+
+const WASM: &str = r#"
+(module
+  (func $add (param $lhs i32) (param $rhs i32) (result i32)
+    local.get $lhs
+    local.get $rhs
+    i32.add)
+  (export "add" (func $add)))
+"#;
+
+fn main() -> Result<()> {
+    let wasm = wat::parse_str(WASM).expect("failed to parse wat");
+    let module = Module::parse_bytes(&wasm)?;
+    let mut store = Store::default();
+    let instance = module.instantiate(&mut store, None)?;
+    let add = instance.exported_func::<(i32, i32), i32>(&store, "add")?;
+
+    assert_eq!(add.call(&mut store, (1, 2))?, 3);
+    Ok(())
+}