wasm-tools 1.252.0

CLI tools for interoperating with WebAssembly files
Documentation 
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;; RUN: wast --assert default --snapshot tests/snapshots % -f cm-async,cm-fixed-length-lists

;; async lower
(component
  (core module $libc (memory (export "memory") 1))
  (core instance $libc (instantiate $libc))

  ;; async func()
  (import "f1" (func $f1 async))
  (core func $f1 (canon lower (func $f1) async))
  (core module $m1 (func (import "" "f") (result i32)))
  (core instance (instantiate $m1 (with "" (instance (export "f" (func $f1))))))

  ;; async func(x: u32)
  (import "f2" (func $f2 async (param "x" u32)))
  (core func $f2 (canon lower (func $f2) async))
  (core module $m2 (func (import "" "f") (param i32) (result i32)))
  (core instance (instantiate $m2 (with "" (instance (export "f" (func $f2))))))

  ;; async func() -> u32
  (import "f3" (func $f3 async (result u32)))
  (core func $f3 (canon lower (func $f3) async (memory $libc "memory")))
  (core module $m3 (func (import "" "f") (param i32) (result i32)))
  (core instance (instantiate $m3 (with "" (instance (export "f" (func $f3))))))

  ;; async func(x: u32, y: f32, z: string)
  (import "f4" (func $f4 async (param "x" u32) (param "y" f32) (param "z" string)))
  (core func $f4 (canon lower (func $f4) async (memory $libc "memory")))
  (core module $m4 (func (import "" "f") (param i32 f32 i32 i32) (result i32)))
  (core instance (instantiate $m4 (with "" (instance (export "f" (func $f4))))))

  ;; async func() -> f32
  (import "f5" (func $f5 async (result f32)))
  (core func $f5 (canon lower (func $f5) async (memory $libc "memory")))
  (core module $m5 (func (import "" "f") (param i32) (result i32)))
  (core instance (instantiate $m5 (with "" (instance (export "f" (func $f5))))))

  ;; async func(x: list<string; 4>) -> f32
  (import "f6" (func $f6 async (param "x" (list string 6)) (result f32)))
  (core func $f6 (canon lower (func $f6) async (memory $libc "memory")))
  (core module $m6 (func (import "" "f") (param i32 i32) (result i32)))
  (core instance (instantiate $m6 (with "" (instance (export "f" (func $f6))))))
)

;; async lift, callback abi
(component
  ;; async func()
  (core module $m1
    (func (export "cb") (param i32 i32 i32) (result i32) unreachable)
    (func (export "f") (result i32) unreachable))
  (core instance $m1 (instantiate $m1))
  (func async
    (canon lift (core func $m1 "f") async (callback (func $m1 "cb"))))

  ;; async func(x: u32)
  (core module $m2
    (func (export "cb") (param i32 i32 i32) (result i32) unreachable)
    (func (export "f") (param i32) (result i32) unreachable))
  (core instance $m2 (instantiate $m2))
  (func async (param "x" u32)
    (canon lift (core func $m2 "f") async (callback (func $m2 "cb"))))

  ;; async func() -> u32
  (core module $m3
    (func (export "cb") (param i32 i32 i32) (result i32) unreachable)
    (func (export "f") (result i32) unreachable))
  (core instance $m3 (instantiate $m3))
  (func async (result u32)
    (canon lift (core func $m3 "f") async (callback (func $m3 "cb"))))

  ;; async func(x: f32)
  (core module $m4
    (func (export "cb") (param i32 i32 i32) (result i32) unreachable)
    (func (export "f") (param f32) (result i32) unreachable))
  (core instance $m4 (instantiate $m4))
  (func async (param "x" f32)
    (canon lift (core func $m4 "f") async (callback (func $m4 "cb"))))

  ;; async func(x: f32, y: string)
  (core module $m5
    (memory (export "memory") 1)
    (func (export "cb") (param i32 i32 i32) (result i32) unreachable)
    (func (export "realloc") (param i32 i32 i32 i32) (result i32) unreachable)
    (func (export "f") (param f32 i32 i32) (result i32) unreachable))
  (core instance $m5 (instantiate $m5))
  (func async (param "x" f32) (param "y" string)
    (canon lift (core func $m5 "f") async (callback (func $m5 "cb"))
      (memory $m5 "memory") (realloc (func $m5 "realloc"))))

  ;; async func(x: list<string; 4>)
  (core module $m6
    (memory (export "memory") 1)
    (func (export "cb") (param i32 i32 i32) (result i32) unreachable)
    (func (export "realloc") (param i32 i32 i32 i32) (result i32) unreachable)
    (func (export "f") (param i32 i32 i32 i32 i32 i32 i32 i32) (result i32) unreachable))
  (core instance $m6 (instantiate $m6))
  (func async (param "x" (list string 4))
    (canon lift (core func $m6 "f") async (callback (func $m6 "cb"))
      (memory $m6 "memory") (realloc (func $m6 "realloc"))))

  ;; async func(x: list<string; 10>)
  (core module $m7
    (memory (export "memory") 1)
    (func (export "cb") (param i32 i32 i32) (result i32) unreachable)
    (func (export "realloc") (param i32 i32 i32 i32) (result i32) unreachable)
    (func (export "f") (param i32) (result i32) unreachable))
  (core instance $m7 (instantiate $m7))
  (func async (param "x" (list string 10))
    (canon lift (core func $m7 "f") async (callback (func $m7 "cb"))
      (memory $m7 "memory") (realloc (func $m7 "realloc"))))
)