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LibJS: Move {Import,Export}Entry out of {Import,Export}Statement

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By making these be standalone instead of nested structs, we can forward
declare them. This will allow us to stop including AST.h in some places.
This commit is contained in:
Andreas Kling 2022-11-23 12:16:51 +01:00 committed by Linus Groh
parent 27e0f56c90
commit e0916dbb35
Notes: sideshowbarker 2024-07-17 04:12:27 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/e0916dbb35
Pull-request: https://github.com/SerenityOS/serenity/pull/16153
Reviewed-by: https://github.com/linusg
5 changed files with 106 additions and 107 deletions
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184
Userland/Libraries/LibJS/AST.h
View File

@ -298,33 +298,33 @@ struct ModuleRequest {
Vector<Assertion> assertions; // [[Assertions]]
};
// ImportEntry Record, https://tc39.es/ecma262/#table-importentry-record-fields
struct ImportEntry {
FlyString import_name; // [[ImportName]] if a String
FlyString local_name; // [[LocalName]]
bool is_namespace { false }; // [[ImportName]] if `namespace-object`
ImportEntry(FlyString import_name_, FlyString local_name_, bool is_namespace_ = false)
: import_name(move(import_name_))
, local_name(move(local_name_))
, is_namespace(is_namespace_)
{
VERIFY(!is_namespace || import_name.is_null());
}
ModuleRequest const& module_request() const
{
VERIFY(m_module_request);
return *m_module_request;
}
private:
friend class ImportStatement;
ModuleRequest* m_module_request; // [[ModuleRequest]]
};
class ImportStatement final : public Statement {
public:
// ImportEntry Record, https://tc39.es/ecma262/#table-importentry-record-fields
struct ImportEntry {
FlyString import_name; // [[ImportName]] if a String
FlyString local_name; // [[LocalName]]
bool is_namespace { false }; // [[ImportName]] if `namespace-object`
ImportEntry(FlyString import_name_, FlyString local_name_, bool is_namespace_ = false)
: import_name(move(import_name_))
, local_name(move(local_name_))
, is_namespace(is_namespace_)
{
VERIFY(!is_namespace || import_name.is_null());
}
ModuleRequest const& module_request() const
{
VERIFY(m_module_request);
return *m_module_request;
}
private:
friend ImportStatement;
ModuleRequest* m_module_request; // [[ModuleRequest]]
};
explicit ImportStatement(SourceRange source_range, ModuleRequest from_module, Vector<ImportEntry> entries = {})
: Statement(source_range)
, m_module_request(move(from_module))
@ -348,77 +348,77 @@ private:
Vector<ImportEntry> m_entries;
};
// ExportEntry Record, https://tc39.es/ecma262/#table-exportentry-records
struct ExportEntry {
enum class Kind {
NamedExport,
ModuleRequestAll,
ModuleRequestAllButDefault,
// EmptyNamedExport is a special type for export {} from "module",
// which should import the module without getting any of the exports
// however we don't want give it a fake export name which may get
// duplicates
EmptyNamedExport,
} kind;
FlyString export_name; // [[ExportName]]
FlyString local_or_import_name; // Either [[ImportName]] or [[LocalName]]
ExportEntry(Kind export_kind, FlyString export_name_, FlyString local_or_import_name_)
: kind(export_kind)
, export_name(move(export_name_))
, local_or_import_name(move(local_or_import_name_))
{
}
bool is_module_request() const
{
return m_module_request != nullptr;
}
static ExportEntry indirect_export_entry(ModuleRequest const& module_request, FlyString export_name, FlyString import_name)
{
ExportEntry entry { Kind::NamedExport, move(export_name), move(import_name) };
entry.m_module_request = &module_request;
return entry;
}
ModuleRequest const& module_request() const
{
VERIFY(m_module_request);
return *m_module_request;
}
private:
ModuleRequest const* m_module_request { nullptr }; // [[ModuleRequest]]
friend class ExportStatement;
public:
static ExportEntry named_export(FlyString export_name, FlyString local_name)
{
return ExportEntry { Kind::NamedExport, move(export_name), move(local_name) };
}
static ExportEntry all_but_default_entry()
{
return ExportEntry { Kind::ModuleRequestAllButDefault, {}, {} };
}
static ExportEntry all_module_request(FlyString export_name)
{
return ExportEntry { Kind::ModuleRequestAll, move(export_name), {} };
}
static ExportEntry empty_named_export()
{
return ExportEntry { Kind::EmptyNamedExport, {}, {} };
}
};
class ExportStatement final : public Statement {
public:
static FlyString local_name_for_default;
// ExportEntry Record, https://tc39.es/ecma262/#table-exportentry-records
struct ExportEntry {
enum class Kind {
NamedExport,
ModuleRequestAll,
ModuleRequestAllButDefault,
// EmptyNamedExport is a special type for export {} from "module",
// which should import the module without getting any of the exports
// however we don't want give it a fake export name which may get
// duplicates
EmptyNamedExport,
} kind;
FlyString export_name; // [[ExportName]]
FlyString local_or_import_name; // Either [[ImportName]] or [[LocalName]]
ExportEntry(Kind export_kind, FlyString export_name_, FlyString local_or_import_name_)
: kind(export_kind)
, export_name(move(export_name_))
, local_or_import_name(move(local_or_import_name_))
{
}
bool is_module_request() const
{
return m_module_request != nullptr;
}
static ExportEntry indirect_export_entry(ModuleRequest const& module_request, FlyString export_name, FlyString import_name)
{
ExportEntry entry { Kind::NamedExport, move(export_name), move(import_name) };
entry.m_module_request = &module_request;
return entry;
}
ModuleRequest const& module_request() const
{
VERIFY(m_module_request);
return *m_module_request;
}
private:
ModuleRequest const* m_module_request { nullptr }; // [[ModuleRequest]]
friend ExportStatement;
public:
static ExportEntry named_export(FlyString export_name, FlyString local_name)
{
return ExportEntry { Kind::NamedExport, move(export_name), move(local_name) };
}
static ExportEntry all_but_default_entry()
{
return ExportEntry { Kind::ModuleRequestAllButDefault, {}, {} };
}
static ExportEntry all_module_request(FlyString export_name)
{
return ExportEntry { Kind::ModuleRequestAll, move(export_name), {} };
}
static ExportEntry empty_named_export()
{
return ExportEntry { Kind::EmptyNamedExport, {}, {} };
}
};
ExportStatement(SourceRange source_range, RefPtr<ASTNode> statement, Vector<ExportEntry> entries, bool is_default_export, ModuleRequest module_request)
: Statement(source_range)
, m_statement(move(statement))

4
Userland/Libraries/LibJS/Forward.h
View File

@ -163,6 +163,8 @@ class Environment;
class Error;
class ErrorType;
struct ExecutionContext;
struct ExportEntry;
class ExportStatement;
class Expression;
class ForStatement;
class FunctionEnvironment;
@ -172,6 +174,8 @@ class GlobalObject;
class HandleImpl;
class Heap;
class HeapBlock;
struct ImportEntry;
class ImportStatement;
class Interpreter;
class Intrinsics;
class Module;

14
Userland/Libraries/LibJS/Parser.cpp
View File

@ -556,7 +556,7 @@ void Parser::parse_module(Program& program)
if (export_statement.has_statement())
continue;
for (auto& entry : export_statement.entries()) {
if (entry.is_module_request() || entry.kind == ExportStatement::ExportEntry::Kind::EmptyNamedExport)
if (entry.is_module_request() || entry.kind == ExportEntry::Kind::EmptyNamedExport)
return;
auto const& exported_name = entry.local_or_import_name;
@ -4162,7 +4162,7 @@ NonnullRefPtr<ImportStatement> Parser::parse_import_statement(Program& program)
bool continue_parsing = true;
struct ImportWithLocation {
ImportStatement::ImportEntry entry;
ImportEntry entry;
Position position;
};
@ -4203,7 +4203,7 @@ NonnullRefPtr<ImportStatement> Parser::parse_import_statement(Program& program)
if (match_imported_binding()) {
auto namespace_position = position();
auto namespace_name = consume().value();
entries_with_location.append({ ImportStatement::ImportEntry({}, namespace_name, true), namespace_position });
entries_with_location.append({ ImportEntry({}, namespace_name, true), namespace_position });
} else {
syntax_error(String::formatted("Unexpected token: {}", m_state.current_token.name()));
}
@ -4271,7 +4271,7 @@ NonnullRefPtr<ImportStatement> Parser::parse_import_statement(Program& program)
auto module_request = parse_module_request();
Vector<ImportStatement::ImportEntry> entries;
Vector<ImportEntry> entries;
entries.ensure_capacity(entries_with_location.size());
for (auto& entry : entries_with_location) {
@ -4293,8 +4293,6 @@ NonnullRefPtr<ImportStatement> Parser::parse_import_statement(Program& program)
NonnullRefPtr<ExportStatement> Parser::parse_export_statement(Program& program)
{
using ExportEntry = ExportStatement::ExportEntry;
// We use the extended syntax which adds:
// ExportDeclaration:
// export ExportFromClause FromClause [no LineTerminator here] AssertClause ;
@ -4572,7 +4570,7 @@ NonnullRefPtr<ExportStatement> Parser::parse_export_statement(Program& program)
consume_or_insert_semicolon();
}
Vector<ExportStatement::ExportEntry> entries;
Vector<ExportEntry> entries;
entries.ensure_capacity(entries_with_location.size());
for (auto& entry : entries_with_location) {
@ -4582,7 +4580,7 @@ NonnullRefPtr<ExportStatement> Parser::parse_export_statement(Program& program)
}
for (auto& new_entry : entries) {
if (new_entry.kind != ExportStatement::ExportEntry::Kind::EmptyNamedExport && new_entry.export_name == entry.entry.export_name)
if (new_entry.kind != ExportEntry::Kind::EmptyNamedExport && new_entry.export_name == entry.entry.export_name)
syntax_error(String::formatted("Duplicate export with name: '{}'", entry.entry.export_name), entry.position);
}

8
Userland/Libraries/LibJS/SourceTextModule.cpp
View File

@ -168,7 +168,7 @@ Result<NonnullGCPtr<SourceTextModule>, Vector<Parser::Error>> SourceTextModule::
VERIFY(export_statement.has_statement());
auto const& entry = export_statement.entries()[0];
VERIFY(entry.kind == ExportStatement::ExportEntry::Kind::NamedExport);
VERIFY(entry.kind == ExportEntry::Kind::NamedExport);
VERIFY(!entry.is_module_request());
VERIFY(import_entries.find_if(
[&](ImportEntry const& import_entry) {
@ -182,7 +182,7 @@ Result<NonnullGCPtr<SourceTextModule>, Vector<Parser::Error>> SourceTextModule::
// Special case, export {} from "module" should add "module" to
// required_modules but not any import or export so skip here.
if (export_entry.kind == ExportStatement::ExportEntry::Kind::EmptyNamedExport) {
if (export_entry.kind == ExportEntry::Kind::EmptyNamedExport) {
VERIFY(export_statement.entries().size() == 1);
break;
}
@ -220,7 +220,7 @@ Result<NonnullGCPtr<SourceTextModule>, Vector<Parser::Error>> SourceTextModule::
}
}
// b. Else if ee.[[ImportName]] is all-but-default, then
else if (export_entry.kind == ExportStatement::ExportEntry::Kind::ModuleRequestAllButDefault) {
else if (export_entry.kind == ExportEntry::Kind::ModuleRequestAllButDefault) {
// i. Assert: ee.[[ExportName]] is null.
VERIFY(export_entry.export_name.is_null());
// ii. Append ee to starExportEntries.
@ -564,7 +564,7 @@ ThrowCompletionOr<ResolvedBinding> SourceTextModule::resolve_export(VM& vm, FlyS
auto imported_module = TRY(vm.host_resolve_imported_module(NonnullGCPtr<Module>(*this), entry.module_request()));
// ii. If e.[[ImportName]] is all, then
if (entry.kind == ExportStatement::ExportEntry::Kind::ModuleRequestAll) {
if (entry.kind == ExportEntry::Kind::ModuleRequestAll) {
// 1. Assert: module does not provide the direct binding for this export.
// FIXME: What does this mean? / How do we check this

3
Userland/Libraries/LibJS/SourceTextModule.h
View File

@ -20,9 +20,6 @@ class SourceTextModule final : public CyclicModule {
JS_CELL(SourceTextModule, CyclicModule);
public:
using ImportEntry = ImportStatement::ImportEntry;
using ExportEntry = ExportStatement::ExportEntry;
static Result<NonnullGCPtr<SourceTextModule>, Vector<Parser::Error>> parse(StringView source_text, Realm&, StringView filename = {}, Script::HostDefined* host_defined = nullptr);
Program const& parse_node() const { return *m_ecmascript_code; }