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LibJS: Add ECMA-262 section/title/URL comments almost everywhere
As mentioned on Discord earlier, we'll add these to all new functions going forward - this is the backfill. Reasons: - It makes you look at the spec, implementing based on MDN or V8 behavior is a no-go - It makes finding the various functions that are non-compliant easier, in the future everything should either have such a comment or, if it's not from the spec at all, a comment explaining why that is the case - It makes it easier to check whether a certain abstract operation is implemented in LibJS, not all of them use the same name as the spec. E.g. RejectPromise() is Promise::reject() - It makes it easier to reason about vm.arguments(), e.g. when the function has a rest parameter - It makes it easier to see whether a certain function is from a proposal or Annex B Also: - Add arguments to all functions and abstract operations that already had a comment - Fix some outdated section numbers - Replace some ecma-international.org URLs with tc39.es
This commit is contained in:
Linus Groh
parent
322c8a3995
commit
7327a28ccc
52 changed files with 480 additions and 101 deletions
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@ -70,9 +70,9 @@ ALWAYS_INLINE bool both_bigint(const Value& lhs, const Value& rhs)
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return lhs.is_bigint() && rhs.is_bigint();
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}
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// 6.1.6.1.20 Number::toString ( x ), https://tc39.es/ecma262/#sec-numeric-types-number-tostring
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static String double_to_string(double d)
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{
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// https://tc39.es/ecma262/#sec-numeric-types-number-tostring
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if (isnan(d))
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return "NaN";
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if (d == +0.0 || d == -0.0)
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@ -198,7 +198,7 @@ static String double_to_string(double d)
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return builder.to_string();
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}
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// 7.2.2 IsArray, https://tc39.es/ecma262/#sec-isarray
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// 7.2.2 IsArray ( argument ), https://tc39.es/ecma262/#sec-isarray
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bool Value::is_array(GlobalObject& global_object) const
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{
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if (!is_object())
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@ -224,6 +224,7 @@ Array& Value::as_array()
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return static_cast<Array&>(*m_value.as_object);
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}
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// 7.2.3 IsCallable ( argument ), https://tc39.es/ecma262/#sec-iscallable
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bool Value::is_function() const
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{
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return is_object() && as_object().is_function();
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@ -235,7 +236,7 @@ Function& Value::as_function()
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return static_cast<Function&>(as_object());
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}
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// 7.2.4 IsConstructor, https://tc39.es/ecma262/#sec-isconstructor
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// 7.2.4 IsConstructor ( argument ), https://tc39.es/ecma262/#sec-isconstructor
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bool Value::is_constructor() const
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{
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if (!is_function())
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@ -246,7 +247,7 @@ bool Value::is_constructor() const
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return true;
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}
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// 7.2.8 IsRegExp, https://tc39.es/ecma262/#sec-isregexp
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// 7.2.8 IsRegExp ( argument ), https://tc39.es/ecma262/#sec-isregexp
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bool Value::is_regexp(GlobalObject& global_object) const
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{
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if (!is_object())
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@ -261,6 +262,7 @@ bool Value::is_regexp(GlobalObject& global_object) const
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return is<RegExpObject>(as_object());
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}
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// 13.5.3 The typeof Operator, https://tc39.es/ecma262/#sec-typeof-operator
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String Value::typeof() const
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{
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switch (m_type) {
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@ -328,6 +330,7 @@ PrimitiveString* Value::to_primitive_string(GlobalObject& global_object)
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return js_string(global_object.heap(), string);
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}
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// 7.1.17 ToString ( argument ), https://tc39.es/ecma262/#sec-tostring
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String Value::to_string(GlobalObject& global_object, bool legacy_null_to_empty_string) const
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{
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switch (m_type) {
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@ -359,6 +362,7 @@ String Value::to_string(GlobalObject& global_object, bool legacy_null_to_empty_s
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}
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}
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// 7.1.2 ToBoolean ( argument ), https://tc39.es/ecma262/#sec-toboolean
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bool Value::to_boolean() const
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{
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switch (m_type) {
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@ -386,6 +390,7 @@ bool Value::to_boolean() const
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}
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}
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// 7.1.1 ToPrimitive ( input [ , preferredType ] ), https://tc39.es/ecma262/#sec-toprimitive
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Value Value::to_primitive(GlobalObject& global_object, PreferredType preferred_type) const
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{
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auto get_hint_for_preferred_type = [&]() -> String {
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@ -422,6 +427,7 @@ Value Value::to_primitive(GlobalObject& global_object, PreferredType preferred_t
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return *this;
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}
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// 7.1.18 ToObject ( argument ), https://tc39.es/ecma262/#sec-toobject
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Object* Value::to_object(GlobalObject& global_object) const
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{
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switch (m_type) {
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@ -448,6 +454,7 @@ Object* Value::to_object(GlobalObject& global_object) const
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}
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}
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// 7.1.3 ToNumeric ( value ), https://tc39.es/ecma262/#sec-tonumeric
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FLATTEN Value Value::to_numeric(GlobalObject& global_object) const
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{
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auto primitive = to_primitive(global_object, Value::PreferredType::Number);
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@ -458,6 +465,7 @@ FLATTEN Value Value::to_numeric(GlobalObject& global_object) const
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return primitive.to_number(global_object);
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}
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// 7.1.4 ToNumber ( argument ), https://tc39.es/ecma262/#sec-tonumber
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Value Value::to_number(GlobalObject& global_object) const
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{
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switch (m_type) {
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@ -501,6 +509,7 @@ Value Value::to_number(GlobalObject& global_object) const
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}
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}
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// 7.1.13 ToBigInt ( argument ), https://tc39.es/ecma262/#sec-tobigint
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BigInt* Value::to_bigint(GlobalObject& global_object) const
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{
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auto& vm = global_object.vm();
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@ -560,6 +569,7 @@ double Value::to_double(GlobalObject& global_object) const
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return number.as_double();
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}
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// 7.1.19 ToPropertyKey ( argument ), https://tc39.es/ecma262/#sec-topropertykey
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StringOrSymbol Value::to_property_key(GlobalObject& global_object) const
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{
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auto key = to_primitive(global_object, PreferredType::String);
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@ -590,9 +600,9 @@ i32 Value::to_i32_slow_case(GlobalObject& global_object) const
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return static_cast<i32>(int32bit);
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}
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// 7.1.7 ToUint32 ( argument ), https://tc39.es/ecma262/#sec-touint32
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u32 Value::to_u32(GlobalObject& global_object) const
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{
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// 7.1.7 ToUint32, https://tc39.es/ecma262/#sec-touint32
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auto number = to_number(global_object);
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if (global_object.vm().exception())
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return INVALID;
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@ -606,10 +616,9 @@ u32 Value::to_u32(GlobalObject& global_object) const
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return static_cast<u32>(int32bit);
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}
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// 7.1.20 ToLength ( argument ), https://tc39.es/ecma262/#sec-tolength
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size_t Value::to_length(GlobalObject& global_object) const
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{
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// 7.1.20 ToLength, https://tc39.es/ecma262/#sec-tolength
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auto& vm = global_object.vm();
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auto len = to_integer_or_infinity(global_object);
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@ -620,10 +629,9 @@ size_t Value::to_length(GlobalObject& global_object) const
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return min(len, MAX_ARRAY_LIKE_INDEX);
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}
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// 7.1.22 ToIndex ( argument ), https://tc39.es/ecma262/#sec-toindex
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size_t Value::to_index(GlobalObject& global_object) const
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{
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// 7.1.22 ToIndex, https://tc39.es/ecma262/#sec-toindex
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auto& vm = global_object.vm();
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if (is_undefined())
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@ -644,10 +652,9 @@ size_t Value::to_index(GlobalObject& global_object) const
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return index;
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}
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// 7.1.5 ToIntegerOrInfinity ( argument ), https://tc39.es/ecma262/#sec-tointegerorinfinity
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double Value::to_integer_or_infinity(GlobalObject& global_object) const
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{
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// 7.1.5 ToIntegerOrInfinity, https://tc39.es/ecma262/#sec-tointegerorinfinity
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auto& vm = global_object.vm();
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auto number = to_number(global_object);
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@ -663,6 +670,7 @@ double Value::to_integer_or_infinity(GlobalObject& global_object) const
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return integer;
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}
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// 13.10 Relational Operators, https://tc39.es/ecma262/#sec-relational-operators
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Value greater_than(GlobalObject& global_object, Value lhs, Value rhs)
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{
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TriState relation = abstract_relation(global_object, false, lhs, rhs);
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@ -671,6 +679,7 @@ Value greater_than(GlobalObject& global_object, Value lhs, Value rhs)
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return Value(relation == TriState::True);
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}
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// 13.10 Relational Operators, https://tc39.es/ecma262/#sec-relational-operators
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Value greater_than_equals(GlobalObject& global_object, Value lhs, Value rhs)
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{
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TriState relation = abstract_relation(global_object, true, lhs, rhs);
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@ -679,6 +688,7 @@ Value greater_than_equals(GlobalObject& global_object, Value lhs, Value rhs)
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return Value(true);
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}
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// 13.10 Relational Operators, https://tc39.es/ecma262/#sec-relational-operators
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Value less_than(GlobalObject& global_object, Value lhs, Value rhs)
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{
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TriState relation = abstract_relation(global_object, true, lhs, rhs);
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@ -687,6 +697,7 @@ Value less_than(GlobalObject& global_object, Value lhs, Value rhs)
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return Value(relation == TriState::True);
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}
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// 13.10 Relational Operators, https://tc39.es/ecma262/#sec-relational-operators
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Value less_than_equals(GlobalObject& global_object, Value lhs, Value rhs)
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{
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TriState relation = abstract_relation(global_object, false, lhs, rhs);
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@ -695,6 +706,7 @@ Value less_than_equals(GlobalObject& global_object, Value lhs, Value rhs)
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return Value(true);
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}
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// 13.12 Binary Bitwise Operators, https://tc39.es/ecma262/#sec-binary-bitwise-operators
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Value bitwise_and(GlobalObject& global_object, Value lhs, Value rhs)
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{
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auto lhs_numeric = lhs.to_numeric(global_object);
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@ -714,6 +726,7 @@ Value bitwise_and(GlobalObject& global_object, Value lhs, Value rhs)
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return {};
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}
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// 13.12 Binary Bitwise Operators, https://tc39.es/ecma262/#sec-binary-bitwise-operators
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Value bitwise_or(GlobalObject& global_object, Value lhs, Value rhs)
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{
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auto lhs_numeric = lhs.to_numeric(global_object);
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@ -737,6 +750,7 @@ Value bitwise_or(GlobalObject& global_object, Value lhs, Value rhs)
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return {};
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}
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// 13.12 Binary Bitwise Operators, https://tc39.es/ecma262/#sec-binary-bitwise-operators
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Value bitwise_xor(GlobalObject& global_object, Value lhs, Value rhs)
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{
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auto lhs_numeric = lhs.to_numeric(global_object);
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@ -760,6 +774,7 @@ Value bitwise_xor(GlobalObject& global_object, Value lhs, Value rhs)
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return {};
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}
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// 13.5.6 Bitwise NOT Operator ( ~ ), https://tc39.es/ecma262/#sec-bitwise-not-operator
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Value bitwise_not(GlobalObject& global_object, Value lhs)
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{
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auto lhs_numeric = lhs.to_numeric(global_object);
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@ -773,11 +788,13 @@ Value bitwise_not(GlobalObject& global_object, Value lhs)
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return js_bigint(global_object.heap(), big_integer_bitwise_not);
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}
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// 13.5.4 Unary + Operator, https://tc39.es/ecma262/#sec-unary-plus-operator
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Value unary_plus(GlobalObject& global_object, Value lhs)
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{
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return lhs.to_number(global_object);
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}
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// 13.5.5 Unary - Operator, https://tc39.es/ecma262/#sec-unary-minus-operator
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Value unary_minus(GlobalObject& global_object, Value lhs)
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{
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auto lhs_numeric = lhs.to_numeric(global_object);
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@ -795,10 +812,9 @@ Value unary_minus(GlobalObject& global_object, Value lhs)
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return js_bigint(global_object.heap(), big_integer_negated);
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}
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// 13.9.1 The Left Shift Operator ( << ), https://tc39.es/ecma262/#sec-left-shift-operator
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Value left_shift(GlobalObject& global_object, Value lhs, Value rhs)
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{
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// 6.1.6.1.9 Number::leftShift
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// https://tc39.es/ecma262/#sec-numeric-types-number-leftShift
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auto lhs_numeric = lhs.to_numeric(global_object);
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if (global_object.vm().exception())
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return {};
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@ -826,10 +842,9 @@ Value left_shift(GlobalObject& global_object, Value lhs, Value rhs)
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return {};
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}
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// 13.9.2 The Signed Right Shift Operator ( >> ), https://tc39.es/ecma262/#sec-signed-right-shift-operator
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Value right_shift(GlobalObject& global_object, Value lhs, Value rhs)
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{
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// 6.1.6.1.11 Number::signedRightShift
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// https://tc39.es/ecma262/#sec-numeric-types-number-signedRightShift
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auto lhs_numeric = lhs.to_numeric(global_object);
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if (global_object.vm().exception())
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return {};
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@ -841,7 +856,6 @@ Value right_shift(GlobalObject& global_object, Value lhs, Value rhs)
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return Value(0);
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if (!rhs_numeric.is_finite_number())
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return lhs_numeric;
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// Ok, so this performs toNumber() again but that "can't" throw
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auto lhs_i32 = lhs_numeric.to_i32(global_object);
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auto rhs_u32 = rhs_numeric.to_u32(global_object);
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return Value(lhs_i32 >> rhs_u32);
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@ -855,10 +869,9 @@ Value right_shift(GlobalObject& global_object, Value lhs, Value rhs)
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return {};
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}
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// 13.9.3 The Unsigned Right Shift Operator ( >>> ), https://tc39.es/ecma262/#sec-unsigned-right-shift-operator
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Value unsigned_right_shift(GlobalObject& global_object, Value lhs, Value rhs)
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{
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// 6.1.6.1.11 Number::unsignedRightShift
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// https://tc39.es/ecma262/#sec-numeric-types-number-unsignedRightShift
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auto lhs_numeric = lhs.to_numeric(global_object);
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if (global_object.vm().exception())
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return {};
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@ -879,6 +892,7 @@ Value unsigned_right_shift(GlobalObject& global_object, Value lhs, Value rhs)
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return {};
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}
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// 13.8.1 The Addition Operator ( + ), https://tc39.es/ecma262/#sec-addition-operator-plus
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Value add(GlobalObject& global_object, Value lhs, Value rhs)
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{
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if (both_number(lhs, rhs)) {
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@ -926,6 +940,7 @@ Value add(GlobalObject& global_object, Value lhs, Value rhs)
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return {};
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}
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// 13.8.2 The Subtraction Operator ( - ), https://tc39.es/ecma262/#sec-subtraction-operator-minus
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Value sub(GlobalObject& global_object, Value lhs, Value rhs)
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{
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auto lhs_numeric = lhs.to_numeric(global_object);
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@ -942,6 +957,7 @@ Value sub(GlobalObject& global_object, Value lhs, Value rhs)
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return {};
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}
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// 13.7 Multiplicative Operators, https://tc39.es/ecma262/#sec-multiplicative-operators
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Value mul(GlobalObject& global_object, Value lhs, Value rhs)
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{
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auto lhs_numeric = lhs.to_numeric(global_object);
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@ -958,6 +974,7 @@ Value mul(GlobalObject& global_object, Value lhs, Value rhs)
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return {};
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}
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// 13.7 Multiplicative Operators, https://tc39.es/ecma262/#sec-multiplicative-operators
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Value div(GlobalObject& global_object, Value lhs, Value rhs)
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{
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auto& vm = global_object.vm();
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@ -980,6 +997,7 @@ Value div(GlobalObject& global_object, Value lhs, Value rhs)
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return {};
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}
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// 13.7 Multiplicative Operators, https://tc39.es/ecma262/#sec-multiplicative-operators
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Value mod(GlobalObject& global_object, Value lhs, Value rhs)
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{
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auto& vm = global_object.vm();
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@ -1008,6 +1026,7 @@ Value mod(GlobalObject& global_object, Value lhs, Value rhs)
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return {};
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}
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// 13.6 Exponentiation Operator, https://tc39.es/ecma262/#sec-exp-operator
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Value exp(GlobalObject& global_object, Value lhs, Value rhs)
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{
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auto& vm = global_object.vm();
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@ -1042,6 +1061,7 @@ Value in(GlobalObject& global_object, Value lhs, Value rhs)
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return Value(rhs.as_object().has_property(lhs_property_key));
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}
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// 13.10.2 InstanceofOperator ( V, target ), https://tc39.es/ecma262/#sec-instanceofoperator
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Value instance_of(GlobalObject& global_object, Value lhs, Value rhs)
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{
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auto& vm = global_object.vm();
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@ -1100,6 +1120,7 @@ Value ordinary_has_instance(GlobalObject& global_object, Value lhs, Value rhs)
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}
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}
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// 7.2.10 SameValue ( x, y ), https://tc39.es/ecma262/#sec-samevalue
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bool same_value(Value lhs, Value rhs)
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{
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if (!same_type_for_equality(lhs, rhs))
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@ -1126,6 +1147,7 @@ bool same_value(Value lhs, Value rhs)
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return same_value_non_numeric(lhs, rhs);
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}
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// 7.2.11 SameValueZero ( x, y ), https://tc39.es/ecma262/#sec-samevaluezero
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bool same_value_zero(Value lhs, Value rhs)
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{
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if (!same_type_for_equality(lhs, rhs))
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@ -1143,6 +1165,7 @@ bool same_value_zero(Value lhs, Value rhs)
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return same_value_non_numeric(lhs, rhs);
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}
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// 7.2.12 SameValueNonNumeric ( x, y ), https://tc39.es/ecma262/#sec-samevaluenonnumeric
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bool same_value_non_numeric(Value lhs, Value rhs)
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{
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||||
VERIFY(!lhs.is_number() && !lhs.is_bigint());
|
||||
|
|
@ -1165,6 +1188,7 @@ bool same_value_non_numeric(Value lhs, Value rhs)
|
|||
}
|
||||
}
|
||||
|
||||
// 7.2.15 IsStrictlyEqual ( x, y ), https://tc39.es/ecma262/#sec-isstrictlyequal
|
||||
bool strict_eq(Value lhs, Value rhs)
|
||||
{
|
||||
if (!same_type_for_equality(lhs, rhs))
|
||||
|
|
@ -1184,6 +1208,7 @@ bool strict_eq(Value lhs, Value rhs)
|
|||
return same_value_non_numeric(lhs, rhs);
|
||||
}
|
||||
|
||||
// 7.2.14 IsLooselyEqual ( x, y ), https://tc39.es/ecma262/#sec-islooselyequal
|
||||
bool abstract_eq(GlobalObject& global_object, Value lhs, Value rhs)
|
||||
{
|
||||
if (same_type_for_equality(lhs, rhs))
|
||||
|
|
@ -1242,6 +1267,7 @@ bool abstract_eq(GlobalObject& global_object, Value lhs, Value rhs)
|
|||
return false;
|
||||
}
|
||||
|
||||
// 7.2.13 IsLessThan ( x, y, LeftFirst ), https://tc39.es/ecma262/#sec-islessthan
|
||||
TriState abstract_relation(GlobalObject& global_object, bool left_first, Value lhs, Value rhs)
|
||||
{
|
||||
Value x_primitive;
|
||||
|
|
@ -1357,7 +1383,7 @@ TriState abstract_relation(GlobalObject& global_object, bool left_first, Value l
|
|||
return TriState::False;
|
||||
}
|
||||
|
||||
// 7.3.10 GetMethod, https://tc39.es/ecma262/#sec-getmethod
|
||||
// 7.3.10 GetMethod ( V, P ), https://tc39.es/ecma262/#sec-getmethod
|
||||
Function* get_method(GlobalObject& global_object, Value value, const PropertyName& property_name)
|
||||
{
|
||||
auto& vm = global_object.vm();
|
||||
|
|
@ -1376,7 +1402,7 @@ Function* get_method(GlobalObject& global_object, Value value, const PropertyNam
|
|||
return &property_value.as_function();
|
||||
}
|
||||
|
||||
// 7.3.18 LengthOfArrayLike, https://tc39.es/ecma262/#sec-lengthofarraylike
|
||||
// 7.3.18 LengthOfArrayLike ( obj ), https://tc39.es/ecma262/#sec-lengthofarraylike
|
||||
size_t length_of_array_like(GlobalObject& global_object, const Object& object)
|
||||
{
|
||||
auto& vm = global_object.vm();
|
||||
|
|
@ -1386,7 +1412,7 @@ size_t length_of_array_like(GlobalObject& global_object, const Object& object)
|
|||
return result.to_length(global_object);
|
||||
}
|
||||
|
||||
// 7.3.22 SpeciesConstructor, https://tc39.es/ecma262/#sec-speciesconstructor
|
||||
// 7.3.22 SpeciesConstructor ( O, defaultConstructor ), https://tc39.es/ecma262/#sec-speciesconstructor
|
||||
Function* species_constructor(GlobalObject& global_object, const Object& object, Function& default_constructor)
|
||||
{
|
||||
auto& vm = global_object.vm();
|
||||
|
|
@ -1408,7 +1434,7 @@ Function* species_constructor(GlobalObject& global_object, const Object& object,
|
|||
return nullptr;
|
||||
}
|
||||
|
||||
// 7.2.1 RequireObjectCoercible, https://tc39.es/ecma262/#sec-requireobjectcoercible
|
||||
// 7.2.1 RequireObjectCoercible ( argument ), https://tc39.es/ecma262/#sec-requireobjectcoercible
|
||||
Value require_object_coercible(GlobalObject& global_object, Value value)
|
||||
{
|
||||
auto& vm = global_object.vm();
|
||||
|
|
@ -1419,7 +1445,7 @@ Value require_object_coercible(GlobalObject& global_object, Value value)
|
|||
return value;
|
||||
}
|
||||
|
||||
// 7.3.19 CreateListFromArrayLike, https://tc39.es/ecma262/#sec-createlistfromarraylike
|
||||
// 7.3.19 CreateListFromArrayLike ( obj [ , elementTypes ] ), https://tc39.es/ecma262/#sec-createlistfromarraylike
|
||||
MarkedValueList create_list_from_array_like(GlobalObject& global_object, Value value, AK::Function<Result<void, ErrorType>(Value)> check_value)
|
||||
{
|
||||
auto& vm = global_object.vm();
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue