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// errorcheck
// Copyright 2024 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Verify that wasmexport supports allowed types and rejects
// unallowed types.
//go:build wasm
package p
import (
"structs"
"unsafe"
)
//go:wasmexport good1
func good1(int32, uint32, int64, uint64, float32, float64, unsafe.Pointer) {} // allowed types
type MyInt32 int32
//go:wasmexport good2
func good2(MyInt32) {} // named type is ok
//go:wasmexport good3
func good3() int32 { return 0 } // one result is ok
//go:wasmexport good4
func good4() unsafe.Pointer { return nil } // one result is ok
//go:wasmexport good5
func good5(string, uintptr) bool { return false } // bool, string, and uintptr are allowed
//go:wasmexport bad1
func bad1(any) {} // ERROR "go:wasmexport: unsupported parameter type"
//go:wasmexport bad2
func bad2(func()) {} // ERROR "go:wasmexport: unsupported parameter type"
//go:wasmexport bad3
func bad3(uint8) {} // ERROR "go:wasmexport: unsupported parameter type"
//go:wasmexport bad4
func bad4(int) {} // ERROR "go:wasmexport: unsupported parameter type"
// Struct and array types are also not allowed.
type S struct { x, y int32 }
type H struct { _ structs.HostLayout; x, y int32 }
type A = structs.HostLayout
type AH struct { _ A; x, y int32 }
//go:wasmexport bad5
func bad5(S) {} // ERROR "go:wasmexport: unsupported parameter type"
//go:wasmexport bad6
func bad6(H) {} // ERROR "go:wasmexport: unsupported parameter type"
//go:wasmexport bad7
func bad7([4]int32) {} // ERROR "go:wasmexport: unsupported parameter type"
// Pointer types are not allowed, with resitrictions on
// the element type.
//go:wasmexport good6
func good6(*int32, *uint8, *bool) {}
//go:wasmexport bad8
func bad8(*S) {} // ERROR "go:wasmexport: unsupported parameter type" // without HostLayout, not allowed
//go:wasmexport bad9
func bad9() *S { return nil } // ERROR "go:wasmexport: unsupported result type"
//go:wasmexport good7
func good7(*H, *AH) {} // pointer to struct with HostLayout is allowed
//go:wasmexport good8
func good8(*struct{}) {} // pointer to empty struct is allowed
//go:wasmexport good9
func good9(*[4]int32, *[2]H) {} // pointer to array is allowed, if the element type is okay
//go:wasmexport toomanyresults
func toomanyresults() (int32, int32) { return 0, 0 } // ERROR "go:wasmexport: too many return values"
//go:wasmexport bad10
func bad10() string { return "" } // ERROR "go:wasmexport: unsupported result type" // string cannot be a result
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