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LibJS: Initial class implementation; allow super expressions in object

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literal methods; add EnvrionmentRecord fields and methods to
LexicalEnvironment

Adding EnvrionmentRecord's fields and methods lets us throw an exception
when |this| is not initialized, which occurs when the super constructor
in a derived class has not yet been called, or when |this| has already
been initialized (the super constructor was already called).
This commit is contained in:
Jack Karamanian 2020-06-08 13:31:21 -05:00 • committed by Andreas Kling
parent a535d58cac
commit 7533fd8b02
18 changed files with 967 additions and 92 deletions
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8
Libraries/LibJS/Parser.h
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@ -46,7 +46,7 @@ public:
NonnullRefPtr<Program> parse_program();
template<typename FunctionNodeType>
NonnullRefPtr<FunctionNodeType> parse_function_node(bool check_for_function_and_name = true);
NonnullRefPtr<FunctionNodeType> parse_function_node(bool check_for_function_and_name = true, bool allow_super_property_lookup = false, bool allow_super_constructor_call = false);
NonnullRefPtr<Statement> parse_statement();
NonnullRefPtr<BlockStatement> parse_block_statement();
@ -80,6 +80,9 @@ public:
NonnullRefPtr<NewExpression> parse_new_expression();
RefPtr<FunctionExpression> try_parse_arrow_function_expression(bool expect_parens);
RefPtr<Statement> try_parse_labelled_statement();
NonnullRefPtr<ClassDeclaration> parse_class_declaration();
NonnullRefPtr<ClassExpression> parse_class_expression(bool expect_class_name);
NonnullRefPtr<Expression> parse_property_key();
struct Error {
String message;
@ -126,6 +129,7 @@ private:
bool match_statement() const;
bool match_variable_declaration() const;
bool match_identifier_name() const;
bool match_property_key() const;
bool match(TokenType type) const;
bool done() const;
void expected(const char* what);
@ -151,6 +155,8 @@ private:
Vector<NonnullRefPtrVector<FunctionDeclaration>> m_function_scopes;
UseStrictDirectiveState m_use_strict_directive { UseStrictDirectiveState::None };
bool m_strict_mode { false };
bool m_allow_super_property_lookup { false };
bool m_allow_super_constructor_call { false };
explicit ParserState(Lexer);
};