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#include "openvic-dataloader/v2script/Parser.hpp"
#include <iostream>
#include <memory>
#include <optional>
#include <string>
#include <utility>
#include <vector>
#include "SimpleGrammar.hpp"
#include "detail/DetectUtf8.hpp"
#include "detail/Errors.hpp"
#include "detail/LexyReportError.hpp"
#include "detail/NullBuff.hpp"
#include "detail/Warnings.hpp"
#include <lexy/action/parse.hpp>
#include <lexy/encoding.hpp>
#include <lexy/input/buffer.hpp>
#include <lexy/input/file.hpp>
#include <lexy/lexeme.hpp>
#include <lexy/visualize.hpp>
#include <openvic-dataloader/ParseError.hpp>
#include <openvic-dataloader/ParseWarning.hpp>
#include <openvic-dataloader/v2script/AbstractSyntaxTree.hpp>
using namespace ovdl::v2script;
/// BufferHandler ///
class Parser::BufferHandler {
public:
bool is_valid() const {
return _buffer.size() != 0;
}
std::optional<ParseError> load_buffer(const char* data, std::size_t size) {
_buffer = lexy::buffer(data, size);
return std::nullopt;
}
std::optional<ParseError> load_buffer(const char* start, const char* end) {
_buffer = lexy::buffer(start, end);
return std::nullopt;
}
std::optional<ParseError> load_file(const char* path) {
auto file = lexy::read_file(path);
if (!file) {
return errors::make_no_file_error(path);
}
_buffer = file.buffer();
return std::nullopt;
}
constexpr bool is_exclusive_utf8() const {
return detail::is_utf8_no_ascii(_buffer);
}
template<typename Node, typename ErrorCallback>
std::optional<std::vector<ParseError>> parse(const ErrorCallback& callback) {
auto result = lexy::parse<Node>(_buffer, callback);
if (!result) {
return result.errors();
}
// This is mighty frustrating
_root = std::unique_ptr<ast::Node>(result.value());
return std::nullopt;
}
std::unique_ptr<ast::Node>& get_root() {
return _root;
}
private:
lexy::buffer<lexy::default_encoding> _buffer;
std::unique_ptr<ast::Node> _root;
};
/// BufferHandler ///
Parser::Parser()
: _buffer_handler(std::make_unique<BufferHandler>()),
_error_stream(detail::cnull) {
set_error_log_to_stderr();
}
Parser::Parser(Parser&&) = default;
Parser& Parser::operator=(Parser&& value) = default;
Parser::~Parser() = default;
Parser Parser::from_buffer(const char* data, std::size_t size) {
Parser result;
return std::move(result.load_from_buffer(data, size));
}
Parser Parser::from_buffer(const char* start, const char* end) {
Parser result;
return std::move(result.load_from_buffer(start, end));
}
Parser Parser::from_file(const char* path) {
Parser result;
return std::move(result.load_from_file(path));
}
///
/// @brief Executes a function on _buffer_handler that is expected to load a buffer
///
/// Expected Use:
/// @code {.cpp}
/// _run_load_func(&BufferHandler::<load_function>, <arguments>);
/// @endcode
///
/// @tparam Args
/// @param func
/// @param args
///
template<typename... Args>
inline void Parser::_run_load_func(std::optional<ParseError> (BufferHandler::*func)(Args...), Args... args) {
_warnings.clear();
_errors.clear();
_has_fatal_error = false;
if (auto error = (_buffer_handler.get()->*func)(args...); error) {
_has_fatal_error = error.value().type == ParseError::Type::Fatal;
_errors.push_back(error.value());
_error_stream.get() << "Error: " << _errors.back().message << '\n';
}
}
Parser& Parser::load_from_buffer(const char* data, std::size_t size) {
_run_load_func(&BufferHandler::load_buffer, data, size);
return *this;
}
Parser& Parser::load_from_buffer(const char* start, const char* end) {
_run_load_func(&BufferHandler::load_buffer, start, end);
return *this;
}
Parser& Parser::load_from_file(const char* path) {
_file_path = path;
_run_load_func(&BufferHandler::load_file, path);
return *this;
}
void Parser::set_error_log_to_null() {
set_error_log_to(detail::cnull);
}
void Parser::set_error_log_to_stderr() {
set_error_log_to(std::cerr);
}
void Parser::set_error_log_to_stdout() {
set_error_log_to(std::cout);
}
void Parser::set_error_log_to(std::basic_ostream<char>& stream) {
_error_stream = stream;
}
bool Parser::simple_parse() {
if (!_buffer_handler->is_valid()) {
return false;
}
struct ostream_output_iterator {
std::reference_wrapper<std::ostream> _stream;
auto operator*() const noexcept {
return *this;
}
auto operator++(int) const noexcept {
return *this;
}
ostream_output_iterator& operator=(char c) {
_stream.get().put(c);
return *this;
}
};
if (_buffer_handler->is_exclusive_utf8()) {
_warnings.push_back(warnings::make_utf8_warning(_file_path));
}
auto errors = _buffer_handler->parse<grammar::File>(ovdl::detail::ReporError.path(_file_path).to(ostream_output_iterator { _error_stream }));
if (errors) {
_errors.reserve(errors->size());
for (auto& err : errors.value()) {
_has_fatal_error |= err.type == ParseError::Type::Fatal;
_errors.push_back(err);
}
return false;
}
_file_node.reset(static_cast<ast::FileNode*>(_buffer_handler->get_root().release()));
return true;
}
bool Parser::has_error() const {
return !_errors.empty();
}
bool Parser::has_fatal_error() const {
return _has_fatal_error;
}
bool Parser::has_warning() const {
return !_warnings.empty();
}
const std::vector<ovdl::ParseError>& Parser::get_errors() const {
return _errors;
}
const std::vector<ovdl::ParseWarning>& Parser::get_warnings() const {
return _warnings;
}
const FileNode* Parser::get_file_node() const {
return _file_node.get();
}
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zaaarf