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LibJS: Add spec comments to Value::to_bigint()
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1 changed files with 17 additions and 2 deletions
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@ -705,22 +705,35 @@ static Optional<BigInt*> string_to_bigint(VM& vm, StringView string);
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// 7.1.13 ToBigInt ( argument ), https://tc39.es/ecma262/#sec-tobigint
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ThrowCompletionOr<BigInt*> Value::to_bigint(VM& vm) const
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{
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// 1. Let prim be ? ToPrimitive(argument, number).
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auto primitive = TRY(to_primitive(vm, PreferredType::Number));
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VERIFY(!primitive.is_empty());
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if (primitive.is_number())
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// 2. Return the value that prim corresponds to in Table 12.
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// Number
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if (primitive.is_number()) {
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// Throw a TypeError exception.
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return vm.throw_completion<TypeError>(ErrorType::Convert, "number", "BigInt");
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}
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switch (primitive.m_value.tag) {
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// Undefined
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case UNDEFINED_TAG:
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// Throw a TypeError exception.
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return vm.throw_completion<TypeError>(ErrorType::Convert, "undefined", "BigInt");
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// Null
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case NULL_TAG:
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// Throw a TypeError exception.
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return vm.throw_completion<TypeError>(ErrorType::Convert, "null", "BigInt");
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// Boolean
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case BOOLEAN_TAG: {
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// Return 1n if prim is true and 0n if prim is false.
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auto value = primitive.as_bool() ? 1 : 0;
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return BigInt::create(vm, Crypto::SignedBigInteger { value }).ptr();
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}
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// BigInt
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case BIGINT_TAG:
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// Return prim.
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return &primitive.as_bigint();
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case STRING_TAG: {
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// 1. Let n be ! StringToBigInt(prim).
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@ -733,7 +746,9 @@ ThrowCompletionOr<BigInt*> Value::to_bigint(VM& vm) const
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// 3. Return n.
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return bigint.release_value();
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}
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// Symbol
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case SYMBOL_TAG:
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// Throw a TypeError exception.
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return vm.throw_completion<TypeError>(ErrorType::Convert, "symbol", "BigInt");
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default:
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VERIFY_NOT_REACHED();
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