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LibJS: Convert can_declare_global_var() to ThrowCompletionOr

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This commit is contained in:
Linus Groh 2021-12-29 15:54:44 +01:00
parent 1817c1f83c
commit 215a56b0e4
4 changed files with 15 additions and 10 deletions
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5
Userland/Libraries/LibJS/AST.cpp
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@ -3650,9 +3650,10 @@ ThrowCompletionOr<void> Program::global_declaration_instantiation(Interpreter& i
if (declared_function_names.contains(name))
return IterationDecision::Continue;
auto var_definable = global_environment.can_declare_global_var(name);
if (interpreter.exception())
auto var_definable_or_error = global_environment.can_declare_global_var(name);
if (var_definable_or_error.is_error())
return IterationDecision::Break;
auto var_definable = var_definable_or_error.release_value();
if (!var_definable) {
interpreter.vm().throw_exception<TypeError>(global_object, ErrorType::CannotDeclareGlobalVariable, name);

12
Userland/Libraries/LibJS/Runtime/AbstractOperations.cpp
View file

@ -660,9 +660,12 @@ ThrowCompletionOr<void> eval_declaration_instantiation(VM& vm, GlobalObject& glo
if (global_var_environment) {
if (global_var_environment->has_lexical_declaration(function_name))
return IterationDecision::Continue;
auto var_definable = global_var_environment->can_declare_global_var(function_name);
if (vm.exception())
auto var_definable_or_error = global_var_environment->can_declare_global_var(function_name);
if (var_definable_or_error.is_error())
return IterationDecision::Break;
auto var_definable = var_definable_or_error.release_value();
if (!var_definable)
return IterationDecision::Continue;
}
@ -697,9 +700,10 @@ ThrowCompletionOr<void> eval_declaration_instantiation(VM& vm, GlobalObject& glo
declaration.for_each_bound_name([&](auto const& name) {
if (!declared_function_names.contains(name)) {
if (global_var_environment) {
auto variable_definable = global_var_environment->can_declare_global_var(name);
if (vm.exception())
auto variable_definable_or_error = global_var_environment->can_declare_global_var(name);
if (variable_definable_or_error.is_error())
return IterationDecision::Break;
auto variable_definable = variable_definable_or_error.release_value();
if (!variable_definable) {
vm.throw_exception<TypeError>(global_object, ErrorType::CannotDeclareGlobalVariable, name);
return IterationDecision::Break;

6
Userland/Libraries/LibJS/Runtime/GlobalEnvironment.cpp
View file

@ -197,21 +197,21 @@ ThrowCompletionOr<bool> GlobalEnvironment::has_restricted_global_property(FlyStr
}
// 9.1.1.4.15 CanDeclareGlobalVar ( N ), https://tc39.es/ecma262/#sec-candeclareglobalvar
bool GlobalEnvironment::can_declare_global_var(FlyString const& name) const
ThrowCompletionOr<bool> GlobalEnvironment::can_declare_global_var(FlyString const& name) const
{
// 1. Let ObjRec be envRec.[[ObjectRecord]].
// 2. Let globalObject be ObjRec.[[BindingObject]].
auto& global_object = m_object_record->binding_object();
// 3. Let hasProperty be ? HasOwnProperty(globalObject, N).
bool has_property = TRY_OR_DISCARD(global_object.has_own_property(name));
bool has_property = TRY(global_object.has_own_property(name));
// 4. If hasProperty is true, return true.
if (has_property)
return true;
// 5. Return ? IsExtensible(globalObject).
return TRY_OR_DISCARD(global_object.is_extensible());
return global_object.is_extensible();
}
// 9.1.1.4.16 CanDeclareGlobalFunction ( N ), https://tc39.es/ecma262/#sec-candeclareglobalfunction

2
Userland/Libraries/LibJS/Runtime/GlobalEnvironment.h
View file

@ -34,7 +34,7 @@ public:
bool has_var_declaration(FlyString const& name) const;
bool has_lexical_declaration(FlyString const& name) const;
ThrowCompletionOr<bool> has_restricted_global_property(FlyString const& name) const;
bool can_declare_global_var(FlyString const& name) const;
ThrowCompletionOr<bool> can_declare_global_var(FlyString const& name) const;
bool can_declare_global_function(FlyString const& name) const;
void create_global_var_binding(FlyString const& name, bool can_be_deleted);
void create_global_function_binding(FlyString const& name, Value, bool can_be_deleted);