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LibJS: Convert get_super_base() to ThrowCompletionOr
Also add spec step comments to it while we're here.
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3 changed files with 14 additions and 5 deletions
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@ -5,8 +5,8 @@
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*/
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#include <LibJS/Interpreter.h>
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#include <LibJS/Runtime/Completion.h>
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#include <LibJS/Runtime/FunctionEnvironment.h>
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#include <LibJS/Runtime/FunctionObject.h>
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#include <LibJS/Runtime/GlobalObject.h>
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namespace JS {
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@ -29,13 +29,21 @@ void FunctionEnvironment::visit_edges(Visitor& visitor)
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}
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// 9.1.1.3.5 GetSuperBase ( ), https://tc39.es/ecma262/#sec-getsuperbase
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Value FunctionEnvironment::get_super_base() const
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ThrowCompletionOr<Value> FunctionEnvironment::get_super_base() const
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{
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VERIFY(m_function_object);
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// 1. Let home be envRec.[[FunctionObject]].[[HomeObject]].
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auto home_object = m_function_object->home_object();
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// 2. If home has the value undefined, return undefined.
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if (!home_object)
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return js_undefined();
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return TRY_OR_DISCARD(home_object->internal_get_prototype_of());
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// 3. Assert: Type(home) is Object.
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// 4. Return ? home.[[GetPrototypeOf]]().
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return { TRY(home_object->internal_get_prototype_of()) };
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}
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// 9.1.1.3.2 HasThisBinding ( ), https://tc39.es/ecma262/#sec-function-environment-records-hasthisbinding
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