wasm-utils/samples/empty_contract.rs

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#![feature(link_args)]
#![no_main]
// as it is experimental preamble
#![allow(dead_code)]
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#[link_args = "-s WASM=1 -s NO_EXIT_RUNTIME=1 -s NO_FILESYSTEM=1"]
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extern {}
#[no_mangle]
pub fn call() {
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}
/* This produces the following code (after injecting gas counter & optimizing)
(module
(type (;0;) (func (result i32)))
(type (;1;) (func))
(type (;2;) (func (param i32)))
(type (;3;) (func (param i32 i32 i64 i32 i32) (result i32)))
(type (;4;) (func (param i32 i32 i32 i32 i32 i32) (result i32)))
(type (;5;) (func (param i32) (result i32)))
(type (;6;) (func (param i32 i32)))
(type (;7;) (func (param i32 i32 i32 i32 i32 i32) (result i32)))
(type (;8;) (func (param i32)))
(import "env" "memory" (memory (;0;) 256 256))
(import "env" "table" (table (;0;) 0 0 anyfunc))
(import "env" "gas" (func (;0;) (type 8)))
(func (;1;) (type 1)
i32.const 2
call 0
nop)
(export "_call" (func 1))
(data (i32.const 1212) "\1c\05"))
*/