wasmtime-cli 42.0.2

Command-line interface for Wasmtime
Documentation 
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;; RUN: wast --assert default --snapshot tests/snapshots %

(component definition
  (import "a" (func (param "foo" string)))
  (import "b" (func (param "foo" string) (param "bar" s32) (param "baz" u32)))
  (import "c" (func (result (tuple u8))))
)

(component definition
  (import "a" (func))
  (import "b" (func (param "p1" string)))
  (import "c" (func (result u32)))
  (import "d" (func (param "p1" bool) (result string)))
)


(assert_invalid
  (component
    (type (func (param "foo" string) (param "FOO" u32)))
  )
  "function parameter name `FOO` conflicts with previous parameter name `foo`"
)

(assert_invalid
  (component
      (core module $m
          (memory (export "memory") 1)
          (func (export "foo") (result i32) unreachable)
      )
      (core instance $i (instantiate $m))

      (func (export "tuple") (result (tuple s8 u8))
          (canon lift (core func $i "foo"))
      )
  )
  "canonical option `memory` is required"
)

(component definition
  (import "a" (func $log (param "msg" string)))
  (core module $libc
    (memory (export "memory") 1)
  )
  (core instance $libc (instantiate $libc))
  (core func (canon lower (func $log) (memory $libc "memory")))
)

(component
  (core module $m
    (memory (export "memory") 1)
    (func (export "ret-list") (result i32) unreachable)
  )
  (core instance $i (instantiate $m))

  (func (export "ret-list") (result (list u8))
    (canon lift (core func $i "ret-list") (memory $i "memory"))
  )
)

(component
  (type $big (func
    (param "p1" u32) (param "p2" u32) (param "p3" u32) (param "p4" u32) (param "p5" u32)
    (param "p6" u32) (param "p7" u32) (param "p8" u32) (param "p9" u32) (param "p10" u32)
    (param "p11" u32) (param "p12" u32) (param "p13" u32) (param "p14" u32) (param "p15" u32)
    (param "p16" u32) (param "p17" u32) (param "p18" u32) (param "p19" u32) (param "p20" u32)
  ))

  (component $c
    (import "big" (func $big (type $big)))
    (core module $libc (memory (export "memory") 1))
    (core instance $libc (instantiate $libc))
    (core func $big (canon lower (func $big) (memory $libc "memory")))
  )
)

(assert_invalid
  (component
    (core module $m
      (memory (export "memory") 1)
      (func (export "roundtrip") (param i32))
    )
    (core instance $m (instantiate $m))

    (type $roundtrip (func
      (param "p1" u32) (param "p2" u32) (param "p3" u32) (param "p4" u32) (param "p5" u32)
      (param "p6" u32) (param "p7" u32) (param "p8" u32) (param "p9" u32) (param "p10" u32)
      (param "p11" u32) (param "p12" u32) (param "p13" u32) (param "p14" u32) (param "p15" u32)
      (param "p16" u32) (param "p17" u32) (param "p18" u32) (param "p19" u32) (param "p20" u32)
    ))

    (func $roundtrip (type $roundtrip)
      (canon lift (core func $m "roundtrip") (memory $m "memory"))
    )
    (export "roundtrip" (func $roundtrip))
  )
  "canonical option `realloc` is required"
)

(assert_invalid
  (component
    (import "a" (func $log (result string)))
    (core module $libc
      (memory (export "memory") 1)
    )
    (core instance $libc (instantiate $libc))
    (core func (canon lower (func $log) (memory $libc "memory")))
  )
  "canonical option `realloc` is required"
)

(assert_invalid
  (component
    (core module $m
      (memory (export "memory") 1)
      (func (export "param-list") (param i32 i32) unreachable)
    )
    (core instance $i (instantiate $m))

    (func (export "param-list") (param "bytes" (list u8))
      (canon lift (core func $i "param-list") (memory $i "memory"))
    )
  )
  "canonical option `realloc` is required"
)

(assert_malformed
  (component binary
    "\00asm" "\0d\00\01\00"   ;; component header
    "\07\05"          ;; component type section, 5 bytes
    "\01"             ;; 1 count
    "\40"             ;; component function type
    "\00"             ;; 0 parameters
    "\01\01"          ;; invalid result encoding
  )
  "invalid leading byte (0x1) for number of results")

(assert_malformed
  (component binary
    "\00asm" "\0d\00\01\00"   ;; component header
    "\07\05"          ;; component type section, 5 bytes
    "\01"             ;; 1 count
    "\40"             ;; component function type
    "\00"             ;; 0 parameters
    "\02\00"          ;; invalid result encoding
  )
  "invalid leading byte (0x2) for component function results")