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/*
* Copyright (c) 2020, Linus Groh <mail@linusgroh.de>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/StringBuilder.h>
#include <LibJS/AST.h>
#include <LibJS/Interpreter.h>
#include <LibJS/Parser.h>
#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/FunctionConstructor.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/ScriptFunction.h>
namespace JS {
FunctionConstructor::FunctionConstructor(GlobalObject& global_object)
: NativeFunction("Function", *global_object.function_prototype())
{
}
void FunctionConstructor::initialize(Interpreter& interpreter, GlobalObject& global_object)
{
NativeFunction::initialize(interpreter, global_object);
define_property("prototype", global_object.function_prototype(), 0);
define_property("length", Value(1), Attribute::Configurable);
}
FunctionConstructor::~FunctionConstructor()
{
}
Value FunctionConstructor::call(Interpreter& interpreter)
{
return construct(interpreter, *this);
}
Value FunctionConstructor::construct(Interpreter& interpreter, Function&)
{
String parameters_source = "";
String body_source = "";
if (interpreter.argument_count() == 1) {
body_source = interpreter.argument(0).to_string(interpreter);
if (interpreter.exception())
return {};
}
if (interpreter.argument_count() > 1) {
Vector<String> parameters;
for (size_t i = 0; i < interpreter.argument_count() - 1; ++i) {
parameters.append(interpreter.argument(i).to_string(interpreter));
if (interpreter.exception())
return {};
}
StringBuilder parameters_builder;
parameters_builder.join(',', parameters);
parameters_source = parameters_builder.build();
body_source = interpreter.argument(interpreter.argument_count() - 1).to_string(interpreter);
if (interpreter.exception())
return {};
}
auto source = String::format("function anonymous(%s) { %s }", parameters_source.characters(), body_source.characters());
auto parser = Parser(Lexer(source));
auto function_expression = parser.parse_function_node<FunctionExpression>();
if (parser.has_errors()) {
auto error = parser.errors()[0];
interpreter.throw_exception<SyntaxError>(error.to_string());
return {};
}
return function_expression->execute(interpreter, global_object());
}
}
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