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