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LibJS: Spec-compliant equality comparisons

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The ECMAScript spec defines multiple equality operations which are used
all over the spec; this patch introduces them. Of course, the two
primary equality operations are AbtractEquals ('==') and StrictEquals
('==='), which have been renamed to 'abstract_eq' and 'strict_eq' in
this patch.

In support of the two operations mentioned above, the following have
also been added: SameValue, SameValueZero, and SameValueNonNumeric.
These are important to have, because they are used elsewhere in the spec
aside from the two primary equality comparisons.
This commit is contained in:
Matthew Olsson 2020-05-07 17:09:00 -07:00 • committed by Andreas Kling
parent cc01933840
commit 532d4bc0ab
6 changed files with 126 additions and 82 deletions
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8
Libraries/LibJS/Runtime/Value.h
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@ -233,11 +233,15 @@ Value mul(Interpreter&, Value lhs, Value rhs);
Value div(Interpreter&, Value lhs, Value rhs);
Value mod(Interpreter&, Value lhs, Value rhs);
Value exp(Interpreter&, Value lhs, Value rhs);
Value eq(Interpreter&, Value lhs, Value rhs);
Value typed_eq(Interpreter&, Value lhs, Value rhs);
Value in(Interpreter&, Value lhs, Value rhs);
Value instance_of(Interpreter&, Value lhs, Value rhs);
bool abstract_eq(Interpreter&, Value lhs, Value rhs);
bool strict_eq(Interpreter&, Value lhs, Value rhs);
bool same_value(Interpreter&, Value lhs, Value rhs);
bool same_value_zero(Interpreter&, Value lhs, Value rhs);
bool same_value_non_numeric(Interpreter&, Value lhs, Value rhs);
const LogStream& operator<<(const LogStream&, const Value&);
}