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#pragma once
#include <cstddef>
#include <sstream>
#include <string>
#include <utility>
#include <vector>
#include <openvic-dataloader/ParseData.hpp>
#include <openvic-dataloader/ParseError.hpp>
#include <lexy/input_location.hpp>
#include <lexy/visualize.hpp>
#include <lexy_ext/report_error.hpp>
namespace ovdl::detail {
template<typename OutputIterator>
struct _ReportError {
OutputIterator _iter;
lexy::visualization_options _opts;
const char* _path;
struct _sink {
OutputIterator _iter;
lexy::visualization_options _opts;
const char* _path;
std::size_t _count;
std::vector<ParseError> _errors;
using return_type = std::vector<ParseError>;
template<typename Input, typename Reader, typename Tag>
void operator()(const lexy::error_context<Input>& context, const lexy::error<Reader, Tag>& error) {
_iter = lexy_ext::_detail::write_error(_iter, context, error, _opts, _path);
++_count;
// Convert the context location and error location into line/column information.
auto context_location = lexy::get_input_location(context.input(), context.position());
auto location = lexy::get_input_location(context.input(), error.position(), context_location.anchor());
std::basic_stringstream<typename Reader::encoding::char_type> message;
// Write the main annotation.
if constexpr (std::is_same_v<Tag, lexy::expected_literal>) {
auto string = lexy::_detail::make_literal_lexeme<typename Reader::encoding>(error.string(), error.length());
message << "expected '" << string.data() << '\'';
} else if constexpr (std::is_same_v<Tag, lexy::expected_keyword>) {
auto string = lexy::_detail::make_literal_lexeme<typename Reader::encoding>(error.string(), error.length());
message << "expected keyword '" << string.data() << '\'';
} else if constexpr (std::is_same_v<Tag, lexy::expected_char_class>) {
message << "expected " << error.name();
} else {
message << error.message();
}
_errors.push_back(
ParseError {
ParseError::Type::Fatal, // TODO: distinguish recoverable errors from fatal errors
std::move(message.str()),
0, // TODO: implement proper error codes
ParseData {
context.production(),
context_location.line_nr(),
context_location.column_nr(),
},
location.line_nr(),
location.column_nr(),
});
}
return_type finish() && {
if (_count != 0)
*_iter++ = '\n';
return _errors;
}
};
constexpr auto sink() const {
return _sink { _iter, _opts, _path, 0 };
}
/// Specifies a path that will be printed alongside the diagnostic.
constexpr _ReportError path(const char* path) const {
return { _iter, _opts, path };
}
/// Specifies an output iterator where the errors are written to.
template<typename OI>
constexpr _ReportError<OI> to(OI out) const {
return { out, _opts, _path };
}
/// Overrides visualization options.
constexpr _ReportError opts(lexy::visualization_options opts) const {
return { _iter, opts, _path };
}
};
constexpr auto ReporError = _ReportError<lexy::stderr_output_iterator> {};
}
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