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LibJS: Use macros to enumerate well-known symbols

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Not only is this a much nicer api (can't pass a typo'd string into the
get_well_known_symbol function), it is also a bit more performant since
there are no hashmap lookups.
This commit is contained in:
Matthew Olsson 2020-07-09 15:34:20 -07:00 • committed by Andreas Kling
parent 2ea85355fe
commit c485c86015
7 changed files with 42 additions and 31 deletions
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2
Libraries/LibJS/Runtime/ArrayPrototype.cpp
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@ -81,7 +81,7 @@ void ArrayPrototype::initialize(Interpreter& interpreter, GlobalObject& global_o
// Use define_property here instead of define_native_function so that
// Object.is(Array.prototype[Symbol.iterator], Array.prototype.values)
// evaluates to true
define_property(interpreter.get_well_known_symbol("iterator"), get("values"), attr);
define_property(interpreter.well_known_symbol_iterator(), get("values"), attr);
}
ArrayPrototype::~ArrayPrototype()

2
Libraries/LibJS/Runtime/IteratorOperations.cpp
View file

@ -36,7 +36,7 @@ Object* get_iterator(Object& obj, String hint, Value method)
if (method.is_empty()) {
if (hint == "async")
TODO();
method = obj.get(obj.interpreter().get_well_known_symbol("iterator"));
method = obj.get(obj.interpreter().well_known_symbol_iterator());
if (interpreter.exception())
return {};
}

2
Libraries/LibJS/Runtime/IteratorPrototype.cpp
View file

@ -37,7 +37,7 @@ IteratorPrototype::IteratorPrototype(GlobalObject& global_object)
void IteratorPrototype::initialize(Interpreter& interpreter, GlobalObject& global_object)
{
Object::initialize(interpreter, global_object);
define_native_function(interpreter.get_well_known_symbol("iterator"), symbol_iterator, 0, Attribute::Writable | Attribute::Enumerable);
define_native_function(interpreter.well_known_symbol_iterator(), symbol_iterator, 0, Attribute::Writable | Attribute::Enumerable);
}
IteratorPrototype::~IteratorPrototype()

6
Libraries/LibJS/Runtime/SymbolConstructor.cpp
View file

@ -46,8 +46,10 @@ void SymbolConstructor::initialize(Interpreter& interpreter, GlobalObject& globa
define_native_function("for", for_, 1, Attribute::Writable | Attribute::Configurable);
define_native_function("keyFor", key_for, 1, Attribute::Writable | Attribute::Configurable);
for (auto& entry : interpreter.get_well_known_symbol_map({}))
define_property(entry.key, entry.value, 0);
#define __JS_ENUMERATE(SymbolName, snake_name) \
define_property(#SymbolName, interpreter.well_known_symbol_##snake_name(), 0);
JS_ENUMERATE_WELL_KNOWN_SYMBOLS
#undef __JS_ENUMERATE
}
SymbolConstructor::~SymbolConstructor()