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LibJS: Function.length respects default and rest parameters

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"[Function.length is] the number of formal parameters. This number
excludes the rest parameter and only includes parameters before
the first one with a default value." - MDN
This commit is contained in:
Matthew Olsson 2020-05-05 20:02:14 -07:00 • committed by Andreas Kling
parent 2c14714ee0
commit 838390171c
6 changed files with 43 additions and 15 deletions
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5
Libraries/LibJS/Runtime/ScriptFunction.h
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@ -33,9 +33,9 @@ namespace JS {
class ScriptFunction final : public Function {
public:
static ScriptFunction* create(GlobalObject&, const FlyString& name, const Statement& body, Vector<FunctionNode::Parameter> parameters, LexicalEnvironment* parent_environment);
static ScriptFunction* create(GlobalObject&, const FlyString& name, const Statement& body, Vector<FunctionNode::Parameter> parameters, i32 m_function_length, LexicalEnvironment* parent_environment);
ScriptFunction(const FlyString& name, const Statement& body, Vector<FunctionNode::Parameter> parameters, LexicalEnvironment* parent_environment, Object& prototype);
ScriptFunction(const FlyString& name, const Statement& body, Vector<FunctionNode::Parameter> parameters, i32 m_function_length, LexicalEnvironment* parent_environment, Object& prototype);
virtual ~ScriptFunction();
const Statement& body() const { return m_body; }
@ -60,6 +60,7 @@ private:
NonnullRefPtr<Statement> m_body;
const Vector<FunctionNode::Parameter> m_parameters;
LexicalEnvironment* m_parent_environment { nullptr };
i32 m_function_length;
};
}