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// br_on_non_null from constant
wasmValidateText(`(module
(func
block (result (ref extern))
ref.null extern
br_on_non_null 0
return
end
drop
)
)`);
// br_on_non_null from parameter
wasmValidateText(`(module
(func (param externref) (result (ref extern))
local.get 0
br_on_non_null 0
unreachable
)
)`);
// br_on_null with multiple results
wasmValidateText(`(module
(func (param (ref null extern) (ref extern)) (result i32 i32 i32 (ref extern))
i32.const 0
i32.const 1
i32.const 2
local.get 0
br_on_non_null 0
local.get 1
)
)`);
// no block type
wasmFailValidateText(`(module
(func
block
ref.null extern
br_on_non_null 0
end
)
)`, /type mismatch: target block type expected to be \[_, ref\]/);
// in dead code
wasmValidateText(`(module
(type $t (func))
(func (result funcref)
ref.null $t
return
br_on_non_null 0
)
)`);
wasmFailValidateText(`(module
(func
return
br_on_non_null 0
)
)`, /type mismatch: target block type expected to be \[_, ref\]/);
// Test the branch takes the correct path and results are passed correctly
let {ifNull} = wasmEvalText(`(module
(func (export "ifNull") (param externref externref) (result externref)
local.get 0
br_on_non_null 0
local.get 1
)
)`).exports;
const DefaultTestVal = "default!test";
assertEq(ifNull(null, DefaultTestVal), DefaultTestVal);
for (let val of WasmNonNullExternrefValues) {
assertEq(ifNull(val, DefaultTestVal), val);
}