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LibJS: Update AST to use completions :^)

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This is another major milestone on our journey towards removing global
VM exception state :^)
Does pretty much exactly what it says on the tin: updating
ASTNode::execute() to return a Completion instead of a plain value. This
will *also* allow us to eventually remove the non-standard unwinding
mechanism and purely rely on the various completion types.
This commit is contained in:
Linus Groh 2022-01-02 21:37:50 +01:00
parent 95acb1ce88
commit da856d7742
11 changed files with 507 additions and 692 deletions
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10
Userland/Libraries/LibJS/Runtime/ShadowRealm.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
* Copyright (c) 2021-2022, Linus Groh <linusg@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -117,13 +117,7 @@ ThrowCompletionOr<Value> perform_shadow_realm_eval(GlobalObject& global_object,
// TODO: Optionally use bytecode interpreter?
// FIXME: We need to use evaluate_statements() here because Program::execute() calls global_declaration_instantiation() when it shouldn't
// a. Set result to the result of evaluating body.
auto result_value = program->evaluate_statements(vm.interpreter(), eval_realm.global_object());
if (auto* exception = vm.exception())
result = throw_completion(exception->value());
else if (!result_value.is_empty())
result = normal_completion(result_value);
else
result = Completion {}; // Normal completion with no value
result = program->evaluate_statements(vm.interpreter(), eval_realm.global_object());
}
// 21. If result.[[Type]] is normal and result.[[Value]] is empty, then