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LibJS: Add a mode to parse JS as a module

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In a module strict mode should be enabled at the start of parsing and we
allow import and export statements.
This commit is contained in:
davidot 2021-08-14 17:30:37 +02:00 • committed by Linus Groh
parent d6d7d11590
commit 7613c22b06
8 changed files with 38 additions and 15 deletions
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16
Userland/Libraries/LibJS/Parser.cpp
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@ -208,10 +208,13 @@ private:
constexpr OperatorPrecedenceTable g_operator_precedence;
Parser::ParserState::ParserState(Lexer l)
Parser::ParserState::ParserState(Lexer l, Program::Type program_type)
: lexer(move(l))
, current_token(lexer.next())
, current_token(TokenType::Invalid, {}, {}, {}, {}, 0, 0, 0)
{
if (program_type == Program::Type::Module)
lexer.disallow_html_comments();
current_token = lexer.next();
}
Parser::Scope::Scope(Parser::Scope::Type type, RefPtr<Parser::Scope> parent_scope)
@ -232,8 +235,9 @@ RefPtr<Parser::Scope> Parser::Scope::get_current_function_scope()
return result;
}
Parser::Parser(Lexer lexer)
: m_state(move(lexer))
Parser::Parser(Lexer lexer, Program::Type program_type)
: m_state(move(lexer), program_type)
, m_program_type(program_type)
{
}
@ -282,8 +286,8 @@ NonnullRefPtr<Program> Parser::parse_program(bool starts_in_strict_mode)
{
auto rule_start = push_start();
ScopePusher scope(*this, ScopePusher::Var | ScopePusher::Let, Scope::Function);
auto program = adopt_ref(*new Program({ m_filename, rule_start.position(), position() }));
if (starts_in_strict_mode) {
auto program = adopt_ref(*new Program({ m_filename, rule_start.position(), position() }, m_program_type));
if (starts_in_strict_mode || m_program_type == Program::Type::Module) {
program->set_strict_mode();
m_state.strict_mode = true;
}