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// Output type is non-nullable if the input type is non-nullable
wasmValidateText(`(module
(func (param externref) (result anyref)
local.get 0
any.convert_extern
)
(func (param anyref) (result externref)
local.get 0
extern.convert_any
)
(func (param (ref extern)) (result (ref any))
local.get 0
any.convert_extern
)
(func (param (ref any)) (result (ref extern))
local.get 0
extern.convert_any
)
(func (result (ref any))
unreachable
any.convert_extern
)
(func (result (ref extern))
unreachable
extern.convert_any
)
)`);
// Output type is nullable if the input type is nullable
wasmFailValidateText(`(module
(func (param externref) (result (ref any))
local.get 0
any.convert_extern
)
)`, /expected/);
wasmFailValidateText(`(module
(func (param anyref) (result (ref extern))
local.get 0
extern.convert_any
)
)`, /expected/);
// Can round trip an externref through anyref and get the same thing back
let {roundtripThroughAny} = wasmEvalText(`(module
(func (export "roundtripThroughAny") (param externref) (result externref)
local.get 0
any.convert_extern
extern.convert_any
)
)`).exports;
for (let value of WasmExternrefValues) {
assertEq(value, roundtripThroughAny(value));
}
assertEq(MaxI31refValue*100, roundtripThroughAny(MaxI31refValue*100));
assertEq(MinI31refValue*100, roundtripThroughAny(MinI31refValue*100));
// Can round trip GC objects through externref and get the same thing back
let {testStruct, testArray} = wasmEvalText(`(module
(type $struct (struct))
(type $array (array i32))
(func (export "testStruct") (result i32)
(local (ref $struct))
(local.set 0 struct.new $struct)
local.get 0
(ref.eq
(ref.cast (ref null $struct)
(any.convert_extern
(extern.convert_any
local.get 0
)
)
)
)
)
(func (export "testArray") (result i32)
(local (ref $array))
(local.set 0 (array.new $array i32.const 0 i32.const 0))
local.get 0
(ref.eq
(ref.cast (ref null $array)
(any.convert_extern
(extern.convert_any
local.get 0
)
)
)
)
)
)`).exports;
assertEq(testStruct(), 1);
assertEq(testArray(), 1);