wasmer_wasm_module_compile_instantiate_and_call_sum.py

1from wasmer import engine, wat2wasm, Store, Module, Instance
2
3# Let's define the WebAssembly module in the WebAssembly Text format (WAT).
4# The module exports a function named `sum` that takes two i32 integers
5# and returns their sum.
6wasm_bytes = wat2wasm(
7    """
8    (module
9      (type $sum_t (func (param i32 i32) (result i32)))
10      (func $sum_f (type $sum_t) (param $x i32) (param $y i32) (result i32)
11        local.get $x
12        local.get $y
13        i32.add)
14      (export "sum" (func $sum_f)))
15    """
16)
17
18# Create a Wasmer store.
19store = Store()
20
21# Let's compile the WebAssembly module.
22module = Module(store, wasm_bytes)
23
24# Now, let's instantiate the WebAssembly module.
25instance = Instance(module)
26
27# We can now call the `sum` exported function!
28results = instance.exports.sum(1, 2)
29
30print(results) # 3