Converting WAST into WASM

wat2wasm helps to convert the WAST format into WASM. Let's take it for a spin:

1. Create a new folder called wabt-playground and go into the folder:

   $ mkdir wabt-playground
   $ cd wabt-playground

2. Create a .wat file called add.wat:

   $ touch add.wat

3. Add the following contents to add.wat:

   (module
   (func $add (param $lhs i32) (param $rhs i32) (result i32)
    get_local $lhs 
     get_local $rhs
       i32.add
   )
   )

4. Convert the WAST format into WASM using the wat2wasm binary:

   $ /path/to/build/directory/of/wabt/wat2wasm add.wat

This generates a valid WebAssembly binary in add.wasm file:

00 61 73 6d 01 00 00 00 01 07 01 60 02 7f 7f 017f 03
 02 01 00 0a 09 01 07 00 20 00 20 01 6a 0b

Note that the size of the generated binary is 32 bytes.

5. WABT reads the WAST format file (.wat) and converts it into a WebAssembly module (.wasm). wat2wasm first validates the given file (.wat) and then converts it into a .wasm file...