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LibMain: Add a new library for more ergonomic userspace entry functions
By linking with LibMain, your program no longer needs to provide main(). Instead, execution begins in this function: ErrorOr<int> serenity_main(Main::Arguments); This allows programs that link with LibMain to use TRY() already in their entry function, without having to do manual ErrorOr unwrapping. This is very experimental, but it seems like a nice idea so let's try it out. :^)
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Userland/Libraries/LibMain/Main.cpp
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Userland/Libraries/LibMain/Main.cpp
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/*
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* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Format.h>
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#include <AK/StringView.h>
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#include <AK/Vector.h>
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#include <LibMain/Main.h>
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int main(int argc, char** argv)
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{
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Vector<StringView> arguments;
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arguments.ensure_capacity(argc);
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for (int i = 0; i < argc; ++i)
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arguments.unchecked_append(argv[i]);
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auto result = serenity_main({
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.argc = argc,
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.argv = argv,
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.arguments = arguments.span(),
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});
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if (result.is_error()) {
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warnln("Runtime error: {}", result.error());
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return 1;
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}
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return result.value();
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}
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