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LibJS: Add spec comments to Value::to_boolean()
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1 changed files with 9 additions and 5 deletions
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@ -436,23 +436,27 @@ bool Value::to_boolean() const
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}
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switch (m_value.tag) {
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// 1. If argument is a Boolean, return argument.
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case BOOLEAN_TAG:
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return as_bool();
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// 2. If argument is any of undefined, null, +0𝔽, -0𝔽, NaN, 0ℤ, or the empty String, return false.
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case UNDEFINED_TAG:
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case NULL_TAG:
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return false;
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case BOOLEAN_TAG:
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return as_bool();
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case INT32_TAG:
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return as_i32() != 0;
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case STRING_TAG:
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return !as_string().is_empty();
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case SYMBOL_TAG:
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return true;
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case BIGINT_TAG:
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return as_bigint().big_integer() != BIGINT_ZERO;
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case OBJECT_TAG:
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// B.3.7.1 Changes to ToBoolean, https://tc39.es/ecma262/#sec-IsHTMLDDA-internal-slot-to-boolean
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// B.3.6.1 Changes to ToBoolean, https://tc39.es/ecma262/#sec-IsHTMLDDA-internal-slot-to-boolean
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// 3. If argument is an Object and argument has an [[IsHTMLDDA]] internal slot, return false.
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if (as_object().is_htmldda())
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return false;
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// 4. Return true.
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return true;
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case SYMBOL_TAG:
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return true;
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default:
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VERIFY_NOT_REACHED();
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