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LibJS: Add Object::invoke()

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This commit is contained in:
Linus Groh 2020-05-28 19:12:34 +01:00 • committed by Andreas Kling
parent 5c6323c130
commit 9755f8d297
2 changed files with 16 additions and 0 deletions
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13
Libraries/LibJS/Runtime/Object.cpp
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@ -662,4 +662,17 @@ Value Object::to_string() const
return js_string(heap(), String::format("[object %s]", class_name()));
}
Value Object::invoke(const FlyString& property_name, Optional<MarkedValueList> arguments) const
{
auto& interpreter = const_cast<Object*>(this)->interpreter();
auto property = get(property_name).value_or(js_undefined());
if (interpreter.exception())
return {};
if (!property.is_function()) {
interpreter.throw_exception<TypeError>(String::format("%s is not a function", property.to_string_without_side_effects().characters()));
return {};
}
return interpreter.call(property.as_function(), const_cast<Object*>(this), move(arguments));
}
}

3
Libraries/LibJS/Runtime/Object.h
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@ -31,6 +31,7 @@
#include <LibJS/Forward.h>
#include <LibJS/Runtime/Cell.h>
#include <LibJS/Runtime/IndexedProperties.h>
#include <LibJS/Runtime/MarkedValueList.h>
#include <LibJS/Runtime/PrimitiveString.h>
#include <LibJS/Runtime/PropertyName.h>
#include <LibJS/Runtime/Shape.h>
@ -107,6 +108,8 @@ public:
IndexedProperties& indexed_properties() { return m_indexed_properties; }
void set_indexed_property_elements(Vector<Value>&& values) { m_indexed_properties = IndexedProperties(move(values)); }
Value invoke(const FlyString& property_name, Optional<MarkedValueList> arguments = {}) const;
private:
virtual Value get_by_index(u32 property_index) const;
virtual bool put_by_index(u32 property_index, Value);