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[doc] Update go example (#3065)

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This commit is contained in:
Olivier Lemasle
2021-07-12 16:01:44 +02:00
committed by GitHub
parent a83497e0b0
commit 65a902f49d
1 changed files with 5 additions and 4 deletions
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9
docs/lang-go.md
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@@ -1,4 +1,4 @@
# Go # Using WebAssembly from Go
Wasmtime [is available as a Go Wasmtime [is available as a Go
Module](https://pkg.go.dev/github.com/bytecodealliance/wasmtime-go). This guide Module](https://pkg.go.dev/github.com/bytecodealliance/wasmtime-go). This guide
@@ -15,6 +15,7 @@ First up you'll want to start a new module:
$ mkdir hello-wasm $ mkdir hello-wasm
$ cd hello-wasm $ cd hello-wasm
$ go mod init hello-wasm $ go mod init hello-wasm
$ go get github.com/bytecodealliance/wasmtime-go
``` ```
Next, copy this example WebAssembly text module into your project. It exports a Next, copy this example WebAssembly text module into your project. It exports a
@@ -39,11 +40,11 @@ func main() {
store := wasmtime.NewStore(engine) store := wasmtime.NewStore(engine)
module, err := wasmtime.NewModuleFromFile(engine, "gcd.wat") module, err := wasmtime.NewModuleFromFile(engine, "gcd.wat")
check(err) check(err)
instance, err := wasmtime.NewInstance(store, module, []*wasmtime.Extern{}) instance, err := wasmtime.NewInstance(store, module, []wasmtime.AsExtern{})
check(err) check(err)
gcd := instance.GetExport("gcd").Func() gcd := instance.GetExport(store, "gcd").Func()
val, err := gcd.Call(6, 27) val, err := gcd.Call(store, 6, 27)
check(err) check(err)
fmt.Printf("gcd(6, 27) = %d\n", val.(int32)) fmt.Printf("gcd(6, 27) = %d\n", val.(int32))
} }