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