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serenity/Userland/js.cpp
Matthew Olsson dd08c992e8 LibJS: Simplify and normalize publicly-exposed Object functions 
Previously, the Object class had many different types of functions for
each action. For example: get_by_index, get(PropertyName),
get(FlyString). This is a bit verbose, so these methods have been
shortened to simply use the PropertyName structure. The methods then
internally call _by_index if necessary. Note that the _by_index
have been made private to enforce this change.

Secondly, a clear distinction has been made between "putting" and
"defining" an object property. "Putting" should mean modifying a
(potentially) already existing property. This is akin to doing "a.b =
'foo'".

This implies two things about put operations:
    - They will search the prototype chain for setters and call them, if
      necessary.
    - If no property exists with a particular key, the put operation
      should create a new property with the default attributes
      (configurable, writable, and enumerable).

In contrast, "defining" a property should completely overwrite any
existing value without calling setters (if that property is
configurable, of course).

Thus, all of the many JS objects have had any "put" calls changed to
"define_property" calls. Additionally, "put_native_function" and
"put_native_property" have had their "put" replaced with "define".

Finally, "put_own_property" has been made private, as all necessary
functionality should be exposed with the put and define_property
methods.
2020-05-27 13:17:35 +02:00

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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/ByteBuffer.h>
#include <AK/NonnullOwnPtr.h>
#include <AK/StringBuilder.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/File.h>
#include <LibJS/AST.h>
#include <LibJS/Console.h>
#include <LibJS/Interpreter.h>
#include <LibJS/Parser.h>
#include <LibJS/Runtime/Array.h>
#include <LibJS/Runtime/Date.h>
#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/Function.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/Object.h>
#include <LibJS/Runtime/PrimitiveString.h>
#include <LibJS/Runtime/Shape.h>
#include <LibJS/Runtime/Value.h>
#include <LibLine/Editor.h>
#include <signal.h>
#include <stdio.h>
Vector<String> repl_statements;
class ReplObject : public JS::GlobalObject {
public:
ReplObject();
virtual void initialize() override;
virtual ~ReplObject() override;
static JS::Value load_file(JS::Interpreter&);
private:
virtual const char* class_name() const override { return "ReplObject"; }
static JS::Value exit_interpreter(JS::Interpreter&);
static JS::Value repl_help(JS::Interpreter&);
static JS::Value save_to_file(JS::Interpreter&);
};
static bool s_dump_ast = false;
static bool s_print_last_result = false;
static RefPtr<Line::Editor> s_editor;
static int s_repl_line_level = 0;
static bool s_fail_repl = false;
static String prompt_for_level(int level)
{
static StringBuilder prompt_builder;
prompt_builder.clear();
prompt_builder.append("> ");
for (auto i = 0; i < level; ++i)
prompt_builder.append(" ");
return prompt_builder.build();
}
String read_next_piece()
{
StringBuilder piece;
do {
auto line_result = s_editor->get_line(prompt_for_level(s_repl_line_level));
if (line_result.is_error()) {
s_fail_repl = true;
return "";
}
auto& line = line_result.value();
s_editor->add_to_history(line);
piece.append(line);
auto lexer = JS::Lexer(line);
for (JS::Token token = lexer.next(); token.type() != JS::TokenType::Eof; token = lexer.next()) {
switch (token.type()) {
case JS::TokenType::BracketOpen:
case JS::TokenType::CurlyOpen:
case JS::TokenType::ParenOpen:
s_repl_line_level++;
break;
case JS::TokenType::BracketClose:
case JS::TokenType::CurlyClose:
case JS::TokenType::ParenClose:
s_repl_line_level--;
break;
default:
break;
}
}
} while (s_repl_line_level > 0);
return piece.to_string();
}
static void print_value(JS::Value value, HashTable<JS::Object*>& seen_objects);
static void print_array(const JS::Array& array, HashTable<JS::Object*>& seen_objects)
{
fputs("[ ", stdout);
for (size_t i = 0; i < array.elements().size(); ++i) {
print_value(array.elements()[i], seen_objects);
if (i != array.elements().size() - 1)
fputs(", ", stdout);
}
fputs(" ]", stdout);
}
static void print_object(const JS::Object& object, HashTable<JS::Object*>& seen_objects)
{
fputs("{ ", stdout);
for (size_t i = 0; i < object.elements().size(); ++i) {
if (object.elements()[i].is_empty())
continue;
printf("\"\033[33;1m%zu\033[0m\": ", i);
print_value(object.elements()[i], seen_objects);
if (i != object.elements().size() - 1)
fputs(", ", stdout);
}
if (!object.elements().is_empty() && object.shape().property_count())
fputs(", ", stdout);
size_t index = 0;
for (auto& it : object.shape().property_table_ordered()) {
printf("\"\033[33;1m%s\033[0m\": ", it.key.characters());
print_value(object.get_direct(it.value.offset), seen_objects);
if (index != object.shape().property_count() - 1)
fputs(", ", stdout);
++index;
}
fputs(" }", stdout);
}
static void print_function(const JS::Object& function, HashTable<JS::Object*>&)
{
printf("\033[34;1m[%s]\033[0m", function.class_name());
}
static void print_date(const JS::Object& date, HashTable<JS::Object*>&)
{
printf("\033[34;1mDate %s\033[0m", static_cast<const JS::Date&>(date).string().characters());
}
static void print_error(const JS::Object& object, HashTable<JS::Object*>&)
{
auto& error = static_cast<const JS::Error&>(object);
printf("\033[34;1m[%s]\033[0m", error.name().characters());
if (!error.message().is_empty())
printf(": %s", error.message().characters());
}
void print_value(JS::Value value, HashTable<JS::Object*>& seen_objects)
{
if (value.is_empty()) {
printf("\033[34;1m<empty>\033[0m");
return;
}
if (value.is_object()) {
if (seen_objects.contains(&value.as_object())) {
// FIXME: Maybe we should only do this for circular references,
// not for all reoccurring objects.
printf("<already printed Object %p>", &value.as_object());
return;
}
seen_objects.set(&value.as_object());
}
if (value.is_array())
return print_array(static_cast<const JS::Array&>(value.as_object()), seen_objects);
if (value.is_object()) {
auto& object = value.as_object();
if (object.is_function())
return print_function(object, seen_objects);
if (object.is_date())
return print_date(object, seen_objects);
if (object.is_error())
return print_error(object, seen_objects);
return print_object(object, seen_objects);
}
if (value.is_string())
printf("\033[32;1m");
else if (value.is_number())
printf("\033[35;1m");
else if (value.is_boolean())
printf("\033[33;1m");
else if (value.is_null())
printf("\033[33;1m");
else if (value.is_undefined())
printf("\033[34;1m");
if (value.is_string())
putchar('"');
printf("%s", value.to_string_without_side_effects().characters());
if (value.is_string())
putchar('"');
printf("\033[0m");
}
static void print(JS::Value value)
{
HashTable<JS::Object*> seen_objects;
print_value(value, seen_objects);
putchar('\n');
}
bool file_has_shebang(AK::ByteBuffer file_contents)
{
if (file_contents.size() >= 2 && file_contents[0] == '#' && file_contents[1] == '!')
return true;
return false;
}
StringView strip_shebang(AK::ByteBuffer file_contents)
{
size_t i = 0;
for (i = 2; i < file_contents.size(); ++i) {
if (file_contents[i] == '\n')
break;
}
return StringView((const char*)file_contents.data() + i, file_contents.size() - i);
}
bool write_to_file(const StringView& path)
{
int fd = open_with_path_length(path.characters_without_null_termination(), path.length(), O_WRONLY | O_CREAT | O_TRUNC, 0666);
for (size_t i = 0; i < repl_statements.size(); i++) {
auto line = repl_statements[i];
if (line.length() && i != repl_statements.size() - 1) {
ssize_t nwritten = write(fd, line.characters(), line.length());
if (nwritten < 0) {
close(fd);
return false;
}
}
if (i != repl_statements.size() - 1) {
char ch = '\n';
ssize_t nwritten = write(fd, &ch, 1);
if (nwritten != 1) {
perror("write");
close(fd);
return false;
}
}
}
close(fd);
return true;
}
bool parse_and_run(JS::Interpreter& interpreter, const StringView& source)
{
auto parser = JS::Parser(JS::Lexer(source));
auto program = parser.parse_program();
if (s_dump_ast)
program->dump(0);
if (parser.has_errors()) {
auto error = parser.errors()[0];
auto hint = error.source_location_hint(source);
if (!hint.is_empty())
printf("%s\n", hint.characters());
interpreter.throw_exception<JS::SyntaxError>(error.to_string());
} else {
interpreter.run(*program);
}
if (interpreter.exception()) {
printf("Uncaught exception: ");
print(interpreter.exception()->value());
interpreter.clear_exception();
return false;
}
if (s_print_last_result)
print(interpreter.last_value());
return true;
}
ReplObject::ReplObject()
{
}
void ReplObject::initialize()
{
GlobalObject::initialize();
define_native_function("exit", exit_interpreter);
define_native_function("help", repl_help);
define_native_function("load", load_file, 1);
define_native_function("save", save_to_file, 1);
}
ReplObject::~ReplObject()
{
}
JS::Value ReplObject::save_to_file(JS::Interpreter& interpreter)
{
if (!interpreter.argument_count())
return JS::Value(false);
String save_path = interpreter.argument(0).to_string_without_side_effects();
StringView path = StringView(save_path.characters());
if (write_to_file(path)) {
return JS::Value(true);
}
return JS::Value(false);
}
JS::Value ReplObject::exit_interpreter(JS::Interpreter& interpreter)
{
if (!interpreter.argument_count())
exit(0);
auto exit_code = interpreter.argument(0).to_number(interpreter);
if (interpreter.exception())
return {};
exit(exit_code.as_double());
}
JS::Value ReplObject::repl_help(JS::Interpreter&)
{
printf("REPL commands:\n");
printf(" exit(code): exit the REPL with specified code. Defaults to 0.\n");
printf(" help(): display this menu\n");
printf(" load(files): Accepts file names as params to load into running session. For example load(\"js/1.js\", \"js/2.js\", \"js/3.js\")\n");
return JS::js_undefined();
}
JS::Value ReplObject::load_file(JS::Interpreter& interpreter)
{
if (!interpreter.argument_count())
return JS::Value(false);
for (auto& file : interpreter.call_frame().arguments) {
String file_name = file.as_string().string();
auto js_file = Core::File::construct(file_name);
if (!js_file->open(Core::IODevice::ReadOnly)) {
fprintf(stderr, "Failed to open %s: %s\n", file_name.characters(), js_file->error_string());
}
auto file_contents = js_file->read_all();
StringView source;
if (file_has_shebang(file_contents)) {
source = strip_shebang(file_contents);
} else {
source = file_contents;
}
parse_and_run(interpreter, source);
}
return JS::Value(true);
}
void repl(JS::Interpreter& interpreter)
{
while (!s_fail_repl) {
String piece = read_next_piece();
if (piece.is_empty())
continue;
repl_statements.append(piece);
parse_and_run(interpreter, piece);
}
}
void enable_test_mode(JS::Interpreter& interpreter)
{
interpreter.global_object().define_native_function("load", ReplObject::load_file);
}
static Function<void()> interrupt_interpreter;
void sigint_handler()
{
interrupt_interpreter();
}
class ReplConsoleClient final : public JS::ConsoleClient {
public:
ReplConsoleClient(JS::Console& console)
: ConsoleClient(console)
{
}
virtual JS::Value log() override
{
puts(interpreter().join_arguments().characters());
return JS::js_undefined();
}
virtual JS::Value info() override
{
printf("(i) %s\n", interpreter().join_arguments().characters());
return JS::js_undefined();
}
virtual JS::Value debug() override
{
printf("\033[36;1m");
puts(interpreter().join_arguments().characters());
printf("\033[0m");
return JS::js_undefined();
}
virtual JS::Value warn() override
{
printf("\033[33;1m");
puts(interpreter().join_arguments().characters());
printf("\033[0m");
return JS::js_undefined();
}
virtual JS::Value error() override
{
printf("\033[31;1m");
puts(interpreter().join_arguments().characters());
printf("\033[0m");
return JS::js_undefined();
}
virtual JS::Value clear() override
{
printf("\033[3J\033[H\033[2J");
fflush(stdout);
return JS::js_undefined();
}
virtual JS::Value trace() override
{
puts(interpreter().join_arguments().characters());
auto trace = interpreter().get_trace();
for (auto& function_name : trace) {
if (function_name.is_empty())
function_name = "<anonymous>";
printf(" -> %s\n", function_name.characters());
}
return JS::js_undefined();
}
virtual JS::Value count() override
{
auto label = interpreter().argument_count() ? interpreter().argument(0).to_string_without_side_effects() : "default";
auto counter_value = m_console.counter_increment(label);
printf("%s: %u\n", label.characters(), counter_value);
return JS::js_undefined();
}
virtual JS::Value count_reset() override
{
auto label = interpreter().argument_count() ? interpreter().argument(0).to_string_without_side_effects() : "default";
if (m_console.counter_reset(label)) {
printf("%s: 0\n", label.characters());
} else {
printf("\033[33;1m");
printf("\"%s\" doesn't have a count\n", label.characters());
printf("\033[0m");
}
return JS::js_undefined();
}
};
int main(int argc, char** argv)
{
bool gc_on_every_allocation = false;
bool disable_syntax_highlight = false;
bool test_mode = false;
const char* script_path = nullptr;
Core::ArgsParser args_parser;
args_parser.add_option(s_dump_ast, "Dump the AST", "dump-ast", 'A');
args_parser.add_option(s_print_last_result, "Print last result", "print-last-result", 'l');
args_parser.add_option(gc_on_every_allocation, "GC on every allocation", "gc-on-every-allocation", 'g');
args_parser.add_option(disable_syntax_highlight, "Disable live syntax highlighting", "no-syntax-highlight", 's');
args_parser.add_option(test_mode, "Run the interpreter with added functionality for the test harness", "test-mode", 't');
args_parser.add_positional_argument(script_path, "Path to script file", "script", Core::ArgsParser::Required::No);
args_parser.parse(argc, argv);
bool syntax_highlight = !disable_syntax_highlight;
OwnPtr<JS::Interpreter> interpreter;
interrupt_interpreter = [&] {
auto error = JS::Error::create(interpreter->global_object(), "Error", "Received SIGINT");
interpreter->throw_exception(error);
};
if (script_path == nullptr) {
s_print_last_result = true;
interpreter = JS::Interpreter::create<ReplObject>();
ReplConsoleClient console_client(interpreter->console());
interpreter->console().set_client(console_client);
interpreter->heap().set_should_collect_on_every_allocation(gc_on_every_allocation);
if (test_mode)
enable_test_mode(*interpreter);
s_editor = Line::Editor::construct();
signal(SIGINT, [](int) {
if (!s_editor->is_editing())
sigint_handler();
s_editor->interrupted();
});
signal(SIGWINCH, [](int) {
s_editor->resized();
});
s_editor->on_display_refresh = [syntax_highlight](Line::Editor& editor) {
auto stylize = [&](Line::Span span, Line::Style styles) {
if (syntax_highlight)
editor.stylize(span, styles);
};
editor.strip_styles();
size_t open_indents = s_repl_line_level;
auto line = editor.line();
JS::Lexer lexer(line);
bool indenters_starting_line = true;
for (JS::Token token = lexer.next(); token.type() != JS::TokenType::Eof; token = lexer.next()) {
auto length = token.value().length();
auto start = token.line_column() - 1;
auto end = start + length;
if (indenters_starting_line) {
if (token.type() != JS::TokenType::ParenClose && token.type() != JS::TokenType::BracketClose && token.type() != JS::TokenType::CurlyClose) {
indenters_starting_line = false;
} else {
--open_indents;
}
}
switch (token.type()) {
case JS::TokenType::Invalid:
case JS::TokenType::Eof:
stylize({ start, end }, { Line::Style::Foreground(Line::Style::XtermColor::Red), Line::Style::Underline });
break;
case JS::TokenType::NumericLiteral:
stylize({ start, end }, { Line::Style::Foreground(Line::Style::XtermColor::Magenta) });
break;
case JS::TokenType::StringLiteral:
case JS::TokenType::TemplateLiteralStart:
case JS::TokenType::TemplateLiteralEnd:
case JS::TokenType::TemplateLiteralString:
case JS::TokenType::RegexLiteral:
case JS::TokenType::UnterminatedStringLiteral:
stylize({ start, end }, { Line::Style::Foreground(Line::Style::XtermColor::Green), Line::Style::Bold });
break;
case JS::TokenType::BracketClose:
case JS::TokenType::BracketOpen:
case JS::TokenType::Comma:
case JS::TokenType::CurlyClose:
case JS::TokenType::CurlyOpen:
case JS::TokenType::ParenClose:
case JS::TokenType::ParenOpen:
case JS::TokenType::Semicolon:
case JS::TokenType::Period:
break;
case JS::TokenType::Ampersand:
case JS::TokenType::AmpersandEquals:
case JS::TokenType::Asterisk:
case JS::TokenType::DoubleAsteriskEquals:
case JS::TokenType::AsteriskEquals:
case JS::TokenType::Caret:
case JS::TokenType::CaretEquals:
case JS::TokenType::DoubleAmpersand:
case JS::TokenType::DoubleAsterisk:
case JS::TokenType::DoublePipe:
case JS::TokenType::DoubleQuestionMark:
case JS::TokenType::Equals:
case JS::TokenType::EqualsEquals:
case JS::TokenType::EqualsEqualsEquals:
case JS::TokenType::ExclamationMark:
case JS::TokenType::ExclamationMarkEquals:
case JS::TokenType::ExclamationMarkEqualsEquals:
case JS::TokenType::GreaterThan:
case JS::TokenType::GreaterThanEquals:
case JS::TokenType::LessThan:
case JS::TokenType::LessThanEquals:
case JS::TokenType::Minus:
case JS::TokenType::MinusEquals:
case JS::TokenType::MinusMinus:
case JS::TokenType::Percent:
case JS::TokenType::PercentEquals:
case JS::TokenType::Pipe:
case JS::TokenType::PipeEquals:
case JS::TokenType::Plus:
case JS::TokenType::PlusEquals:
case JS::TokenType::PlusPlus:
case JS::TokenType::QuestionMark:
case JS::TokenType::QuestionMarkPeriod:
case JS::TokenType::ShiftLeft:
case JS::TokenType::ShiftLeftEquals:
case JS::TokenType::ShiftRight:
case JS::TokenType::ShiftRightEquals:
case JS::TokenType::Slash:
case JS::TokenType::SlashEquals:
case JS::TokenType::Tilde:
case JS::TokenType::UnsignedShiftRight:
case JS::TokenType::UnsignedShiftRightEquals:
break;
case JS::TokenType::BoolLiteral:
case JS::TokenType::NullLiteral:
stylize({ start, end }, { Line::Style::Foreground(Line::Style::XtermColor::Yellow), Line::Style::Bold });
break;
case JS::TokenType::Class:
case JS::TokenType::Const:
case JS::TokenType::Debugger:
case JS::TokenType::Delete:
case JS::TokenType::Function:
case JS::TokenType::In:
case JS::TokenType::Instanceof:
case JS::TokenType::Interface:
case JS::TokenType::Let:
case JS::TokenType::New:
case JS::TokenType::TemplateLiteralExprStart:
case JS::TokenType::TemplateLiteralExprEnd:
case JS::TokenType::Throw:
case JS::TokenType::Typeof:
case JS::TokenType::Var:
case JS::TokenType::Void:
stylize({ start, end }, { Line::Style::Foreground(Line::Style::XtermColor::Blue), Line::Style::Bold });
break;
case JS::TokenType::Await:
case JS::TokenType::Case:
case JS::TokenType::Catch:
case JS::TokenType::Do:
case JS::TokenType::Else:
case JS::TokenType::Finally:
case JS::TokenType::For:
case JS::TokenType::If:
case JS::TokenType::Return:
case JS::TokenType::Switch:
case JS::TokenType::Try:
case JS::TokenType::While:
case JS::TokenType::Yield:
stylize({ start, end }, { Line::Style::Foreground(Line::Style::XtermColor::Cyan), Line::Style::Italic });
break;
case JS::TokenType::Identifier:
stylize({ start, end }, { Line::Style::Foreground(Line::Style::XtermColor::White), Line::Style::Bold });
default:
break;
}
}
editor.set_prompt(prompt_for_level(open_indents));
};
auto complete = [&interpreter](const Line::Editor& editor) -> Vector<Line::CompletionSuggestion> {
auto line = editor.line(editor.cursor());
JS::Lexer lexer { line };
enum {
Initial,
CompleteVariable,
CompleteNullProperty,
CompleteProperty,
} mode { Initial };
StringView variable_name;
StringView property_name;
// we're only going to complete either
// - <N>
// where N is part of the name of a variable
// - <N>.<P>
// where N is the complete name of a variable and
// P is part of the name of one of its properties
auto js_token = lexer.next();
for (; js_token.type() != JS::TokenType::Eof; js_token = lexer.next()) {
switch (mode) {
case CompleteVariable:
switch (js_token.type()) {
case JS::TokenType::Period:
// ...<name> <dot>
mode = CompleteNullProperty;
break;
default:
// not a dot, reset back to initial
mode = Initial;
break;
}
break;
case CompleteNullProperty:
if (js_token.is_identifier_name()) {
// ...<name> <dot> <name>
mode = CompleteProperty;
property_name = js_token.value();
} else {
mode = Initial;
}
break;
case CompleteProperty:
// something came after the property access, reset to initial
case Initial:
if (js_token.is_identifier_name()) {
// ...<name>...
mode = CompleteVariable;
variable_name = js_token.value();
} else {
mode = Initial;
}
break;
}
}
bool last_token_has_trivia = js_token.trivia().length() > 0;
if (mode == CompleteNullProperty) {
mode = CompleteProperty;
property_name = "";
last_token_has_trivia = false; // <name> <dot> [tab] is sensible to complete.
}
if (mode == Initial || last_token_has_trivia)
return {}; // we do not know how to complete this
Vector<Line::CompletionSuggestion> results;
Function<void(const JS::Shape&, const StringView&)> list_all_properties = [&results, &list_all_properties](const JS::Shape& shape, auto& property_pattern) {
for (const auto& descriptor : shape.property_table()) {
if (descriptor.key.view().starts_with(property_pattern)) {
Line::CompletionSuggestion completion { descriptor.key, Line::CompletionSuggestion::ForSearch };
if (!results.contains_slow(completion)) { // hide duplicates
results.append({ descriptor.key });
}
}
}
if (const auto* prototype = shape.prototype()) {
list_all_properties(prototype->shape(), property_pattern);
}
};
switch (mode) {
case CompleteProperty: {
auto maybe_variable = interpreter->get_variable(variable_name);
if (maybe_variable.is_empty()) {
maybe_variable = interpreter->global_object().get(FlyString(variable_name));
if (maybe_variable.is_empty())
break;
}
auto variable = maybe_variable;
if (!variable.is_object())
break;
const auto* object = variable.to_object(*interpreter);
const auto& shape = object->shape();
list_all_properties(shape, property_name);
if (results.size())
editor.suggest(property_name.length());
break;
}
case CompleteVariable: {
const auto& variable = interpreter->global_object();
list_all_properties(variable.shape(), variable_name);
if (results.size())
editor.suggest(variable_name.length());
break;
}
default:
ASSERT_NOT_REACHED();
}
return results;
};
s_editor->on_tab_complete = move(complete);
repl(*interpreter);
} else {
interpreter = JS::Interpreter::create<JS::GlobalObject>();
ReplConsoleClient console_client(interpreter->console());
interpreter->console().set_client(console_client);
interpreter->heap().set_should_collect_on_every_allocation(gc_on_every_allocation);
if (test_mode)
enable_test_mode(*interpreter);
signal(SIGINT, [](int) {
sigint_handler();
});
auto file = Core::File::construct(script_path);
if (!file->open(Core::IODevice::ReadOnly)) {
fprintf(stderr, "Failed to open %s: %s\n", script_path, file->error_string());
return 1;
}
auto file_contents = file->read_all();
StringView source;
if (file_has_shebang(file_contents)) {
source = strip_shebang(file_contents);
} else {
source = file_contents;
}
if (!parse_and_run(*interpreter, source))
return 1;
}
return 0;
}
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