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LibJS: Use the function's bound |this| and bound arguments in

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Interpreter::call()
This commit is contained in:
Jack Karamanian 2020-05-30 01:07:02 -05:00 • committed by Andreas Kling
parent 3ffb0a4e87
commit f4129ac422
2 changed files with 14 additions and 2 deletions
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5
Libraries/LibJS/Interpreter.cpp
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@ -207,9 +207,10 @@ Value Interpreter::call(Function& function, Value this_value, Optional<MarkedVal
{
auto& call_frame = push_call_frame();
call_frame.function_name = function.name();
call_frame.this_value = this_value;
call_frame.this_value = function.bound_this().value_or(this_value);
call_frame.arguments = function.bound_arguments();
if (arguments.has_value())
call_frame.arguments = arguments.value().values();
call_frame.arguments.append(arguments.value().values());
call_frame.environment = function.create_environment();
auto result = function.call(*this);
pop_call_frame();

11
Libraries/LibJS/Tests/Function.prototype.bind.js
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@ -11,6 +11,17 @@ try {
}
assert(getB.bind("bar")() === "B");
// Bound functions should work with array functions
var Make3 = Number.bind(null, 3);
assert([55].map(Make3)[0] === 3);
var MakeTrue = Boolean.bind(null, true);
assert([1, 2, 3].filter(MakeTrue).length === 3);
assert([1, 2, 3].reduce((function (acc, x) { return acc + x }).bind(null, 4, 5)) === 9);
assert([1, 2, 3].reduce((function (acc, x) { return acc + x + this; }).bind(3)) === 12);
function sum(a, b, c) {
return a + b + c;
}